Library, K,W. Bldg

APR 2 1 1965

NBS MONOGRAPH 77

Sound Insulation of Wall,

Floor, and Door Constructions

\^\ sj

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

1
THE NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards is a principal focal point in the Federal Government for

assuring maximum application of the physical and engineering sciences to the advancement of

technolog;^ in industry and commerce. Its responsibilities include development and maintenance

of the national standards of measurement, and the provisions of means for making measurements

consistent with those standards; determination of physical constants and properties of materials;

development of methods for testing materials, mechanisms, and structures, and making such tests as may be necessary, particularly for government agencies; cooperation in the establishment of

standard practices for incorporation in codes and specifications; advisory service to government

agencies on scientific and technical problems; invention and development of devices to serve

special needs of the Government; assistance to industry, business, and consumers in the development and acceptance of commercial standards and simplified trade practice recommendations;

administration of programs in cooperation with United States business groups and standards

organizations for the development of international standards of practice; and maintenance of a

clearinghouse for the collection and dissemination of scientific, technical, and engineering information. The scope of the Bureau's activities is suggested in the following listing of its four Institutes

and their organizational units.

Institute for Basic Standards. Electricity. Metrology. Heat. Radiation Physics. Mechanics.

Apphed Mathematics. Atomic Physics. Physical Chemistry. Laboratory Astrophysics. * Radio

Standards Laboratory: Radio Standards Physics; Radio Standards Engineering.** Office of

Standard Reference Data.

Institute for Materials Research. Analytical Chemistry. Polymers. Metalliu-gy. Inorganic

Materials. Reactor Radiations. Cryogenics.** Ofiice of Standard Reference Materials.

Central Radio Propagation Laboratory.** Ionosphere Research and Propagation. Troposphere and Space Telecommunications. Radio Systems. Upper Atmosphere and Space Physics.

Institute for Applied Technology. TextUes and Apparel Technology Center. Building Research. Industrial Equipment. Information Technology. Performance Test Development.

Instrumentation. Transport Systems. Office of Technical Services. Office of Weights and

Measures. Office of Engineering Standards. Ofiice of Industrial Services.

•NBS Group, Joint Institute for Laboratory Astrophysics at the University of Colorado. "Located at Boulder, Colorado.
UNITED STATES DEPARTMENT OF COMMERCE . Luther H. Hodges, Secreta, NATIONAL BUREAU OF STANDARDS • A. V. Astin, Director

Sound Insulation of Wall,

Floor, and Door Constructions

Raymond D. Berendt and George E. Winzer

National Bureau of Standards Monograph 77

Consolidated Supplement to Building Materials and Structures Report 144

(Supersedes Supplements 1 and 2 of BMS Report 144)

Issued November 30, 1964

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C., 20402 - Price 40 cents
Library of Congress Catalog Card Number : 64-60044
Foreword

The increasing concentration of dwellings in lu-ban areas, along with the current trend toward lightweight structures, has recently placed emphasis upon

noise control problems in multifamily dwellings. To erect buildings with good

sound insvdation, architects and builders need to know the acoustic properties

of various building materials and structm-es. This pubUcation, containing

acoustical test results on over 100 building constructions, was prepared to meet their needs.

The National Bineau of Standards has investigated the sound insulating

properties of building structures for many years and continues to strive toward

improvement of the measuring techniques employed in these investigations.

In 1939, the Bureau's first summary report oq sound insulation of building structures was pubUshed as NBS Building Materials and Structures Report

17, Sound Insulation of Wall and Floor Constructions. Supplements to BMS 17, were issued in 1940 and 1947. These earher pubhcations were superseded by

BMS 144, Sound Insulation oj Wall and Floor Constructions (1955), to which

supplemeats were issued in 1956 and 1958.

The present Monograph supersedes the first and second supplements to BMS 144. It includes all the information contained in these supplements as well as additional data obtained through January 1964. New single-figure

ratings are given for airborne sound transmission (STC) and impact sound

transmission (INK). Octave-frequency band spectra of impact noise are in- cluded as additional information.

A. V. AsTiN, Director.

Ill

Contents

Page

1. Introduction 1 2. Measurement of sound transmission loss 1 3. Discussion of the single-figure ratings of airborne sound insulation 2

4. Sound transmission class (STC) 2

5. Measurement of impact sound pressure levels 2

6. Discussion of single-figure ratings of impact sound insulation 4

7. Impact noise ratings (INR) 4

List of Tables

1. Airborne sound transmission loss—doors 7 1-A. Airborne sound transmission loss—miscellaneous structures 17

2. Airborne sound transmission loss—walls 25

3. Sound transmission loss and impact sound pressure levels of floorceiUng constructions 37

Index I. Numerical index of test panels 44

Index II. Sound transmission class index of test panels

A. Doors 45

B. Walls 46

C. Floor-ceUing constructions 48

D. Miscellaneous structures 48

Index III. Impact noise rating index of floor-ceUing constructions 49

Appendix: Conversion of units to international system units 48

V
II
Sound Insulation of Wall, Floor, and Door Constructions

Raymond D. Berendt and George E. Winzer

The data obtained at the National Bureau of Standards on the sound insulating properties of building structures are summarized. The results of the two previous Supplements

to BMS Report 144 (1955) are included, together with later results obtained through January

1964. Single figure ratings, STC and INR, for airborne sound transmission and impact

sound transmission, respectively, as well as the octave frequency band spectra of impact

noise, are included as additional information. A brief description of the sound-measuring

techniques is given.

1. Introduction

Building Materials and Structures Report 144,'

issued February 1955, and its two supplements,

issued in February 1956 and December 1958 re-

: spectively, included the results of sound insulation

measvirements made at the National Bureau of Standards through December 1957. This Monograph is designed to supersede Supplements 1 and

; 2 by including aU the information contained in

! them as well as aU results obtained in the period

January 1958 through January 1964. In recent years, the increasing severity of the

noise control problem in multifamUy dwellings ha's placed an emphasis upon impact sound insulation.

Therefore, the octave band analyses of impact

sound pressiu-e level measurements (ISPL) are included in the results reported in this publication. In addition, the Sound Transmission Class ^ (STC) values have been included as a guide to

classification of the sound insulation of walls,

floors, and doors.

The authors express their sincere appreciation

to the members of the Soimd Section StaflF, past

and present, who performed the measurements

cited here, and to the members of the section's

Mechanical Support Group who produced the

drawings of the test specimens.

Special thanks are due to Gary R. Kahler, who

checked the data, and to David R. DeAngelis,

whose drawings have greatly added to the clarity

of the descriptions contained herein. The coI operation of Mrs. LaHoma Cloeren, who typed the

I manuscript, is sincerely appreciated.

2. Measurement of Sound Transmission Loss

Measurements are made in accordance with

ASTM E90-61T.2

Figure 1 shows the test rooms in which most of

the results contained in this report were obtained.

Rooms A, B, and C are reverberant rooms which

' For sale by the Superintendent of Documents, U.S. Government Printing

Office, Washington, D.C., 20402. Price, 40 cents. 'American Society for Testing and Materials "Tentative Recommended

Practice for Laboratory Measurement of Airborne Sound Transmission Loss

of BuUding Floors and Walls." ASTM Designation: E90-61T, issued 1961.

have volumes of approximately 1213, 1691, and

1631 cubic feet, respectively. Wall test panels,

usually buUt into a 2X8-in. wood frame with outside dimensions of 71X88 in., are installed in the

test opening between rooms A and B. Floorceiling test panels of the same size are installed in

the test opening between rooms C and A.

The method of test employs an interchange of source and receiving rooms, wherein first the A

room is the source room and the B room the

receiving room, and then vice versa. The results

of the two tests are averaged. The sound source

consists of four boxed loudspeakers placed in the

lower trihedral corners of the room. In each

room, six microphones, selectively placed at dis- tances no less than one-quarter wavelength for the lowest test frequency from aU reflecting surfaces, space-average the sound pressure levels which are automatically recorded by a sound

level recorder.

The eleven test frequencies used are 125, 175,

250, 350, 500, 700, 1000, 1500, 2000, 3000, and

4000 hertz (Hz) . * The test signals are frequency

modulated at a rate of 8 times per second to give

bands of frequencies; approximate bandwidths are

•One hertz=one cycle per second. This new symbol was adopted by the Eleventh General Conference on Weights and Measures, Paris, October

11-20, 1960.

CONTROL ROOM

I I

I

I ^TEST WALL PANEL

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I

!

Figure 1. Vertical section of NBS sound transmission

facilities.

1
as follows: ±20 percent of the nominal test fre- quency at 125 Hz, ±15 percent at 175 Hz, ±13

percent at 350 Hz, ±7 percent at 3000 Hz, ±5

percent at 4000 Hz, and ±10 percent at the other

frequencies. The signal received is filtered to improve the signal-to-noise ratio. The sound

transmission loss (STL) is defined by the expression: ^ STL=Z,-Z2 + 10 logio (^-j^ in decibels,

where:

Zi=time-space average sound pressure level in

the source room,

Z2 = time-space average sound pressure level in

the receiving room,

5*= area of sound transmitting surface of the

test specimen,

^2 =total absorption of the receiving room, in

sabins.

3. Discussion of the Single- Figure Ratings of Airborne Sound Insulation

Since the beginning of investigations of the

acoustic properties of architectmal structures,

several methods have been proposed and employed

to classify such structures by means of a singlevalue rating as to their sound insulating properties.

These ratings have all been based upon the physical measurements of STL at various frequencies.

The nine-frequency arithmetic average was

reported in BMS Report 144 (1955), and in the

interim, we have used single-figure ratings, such

as the eleven-frequency arithmetic average and

the energy average. These early ratings have

been superseded by the sound transmission class (STC) in the present publication. It is commonly

acknowledged that a single figiue classification

does serve a useful purpose in categorizing struc- tures with similar soimd insulation properties.

It should be emphasized that the sound transmission

loss spectra should be studied in order to choose the proper construction to meet the sound insulation

requirements of a particular installation. The sound transmission class, which is based on

a minimum performance concept patterned after European rating systems, makes an attempt to rank-order panels with some regard to insulation

from annoying frequencies. Since the methods

of obtaining the various single figures differ,

caution must be exercised to avoid using different single figure classification values interchangeably;

i.e., a test panel whose arithmetic or energy

average is 45 dB will not necessarily have an STC of 45; more than likely it will differ. If comparison of present results with earlier residts

' E. Buckingham, "Theory and Interpretation of Experiments on the Transmission of Sound through Partition Walls," BS Sci. Pap. iO, 193-

219 (1925) S506.

is desired, suSicient data are reported to enable one to readily obtain any of the other averages.

4. Sound Transmission Class (STC)*

In this classification system a test specimen is

^ rated by comparing its sound transmission losses at the eleven test frequencies with the soimd

transmission class contours. STC contom-s may j be constructed on conventional semi-logarithmic

paper as follows:* a horizontal line segment from!

1400 to 4000 Hz, at a soimd transmission loss

value corresponding to the sound transmission i class; a middle line segment decreasing 6 dB in ^ the interval 1400 to 350 Hz; a low-frequency

segment decreasing 14 dB in the interval 350 to 125 Hz (see fig. 2). The soimd transmission

class for the specimen corresponds to the higher

STC contour (to the nearest decibel) that fits the

sound transmission loss measurements according

to the following rules :

j (1) The sound transmission loss values must be on or above the STC contour in the frequency

range 350 to 1400 Hz.

(2) An average deviation of 1 dB or less is permitted in each of the frequency ranges below | 350 and above 1400 Hz; (in calculating the average

deviation in these ranges, points lying above the

contour are assumed to lie on the contour).

Three examples are given in figure 2; the STC

of Curve A is 50 as determined by the STL at 175 Hz; the STC of Curve B is 40 as determined

by the STL at 500 Hz; and the STC of Curve C

is 30 as determined by the STL values at 2000

and 3000 Hz. The foregoing examples illustrate,

the use of the rules for determining the STC, and

also point up the advantage of having a single,

figure which drastically reduces the number of! sound transmission loss spectra which have to be

examined in order to choose a construction which:.

wUl meet specific sound insulation requirements.!

The STC values (indicated by *) in the tables

for panels 608-629, 237-238, 313-319, 438, and.

711-712 were obtained from measurements at nine rather than eleven frequencies and should be j regarded with caution since it is difficult to pre-;

diet the behavior of test specimens at 1500 and

3000 Hz without actual measurements. j

5. Measurement of Impact Sound > Pressure Levels

The assessment of impact sound transmission)

through a floor-ceUing structure begins with the

measurement of the sound pressure levels in the ) room below, which are generated by a standard

tapping machine in operation on the test floors

(see fig. 1). 1 Impact sound pressure level measurements are made in accordance with the ISO Recommenda- i

* ASTM E90-61T; A4., p. 1131. 'f » ASTM E90-61T; Note 2., p. 1131. 2
60

50

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- 40

FiGTJBE 2. Sound Transmission Class {STC) contours with three typical spectra illustrating use of STC rating.

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tion R140-1960 (E).^ The impact sound is generated by a tapping machine, figure 3, placed

successively in at least three positions on the

test floor. For floors which are nonhomogeneous,

the tapping machine position is carefully specified; e.g., for joist constructions the machine is placed with the line of hammers striking (a) between joists, (b) on a joist, and (c) across a

joist with only the center hammer striking on the

joist.

T^e tapping machine is constructed in accord- ance with the cited specification, as follows:

(a) Five hammers placed in a line, with the

center to center distance, of the two end hammers

about 40 cm.

(b) The time between successive impacts should

be 100± 5 msec.

(c) The effective mass of each hammer should

be 0.5 kg (within 2.5 percent).

(d) The drop of the hammer on a flat floor shoidd be equivalent to a free drop without

friction of 4 cm (within 2.5 percent).

(e) The part of the hammer which strikes the

floor shoiilcl be a cylinder of brass or steel, 3 cm

125 250 500 1000 2000 4000

FREQUENCY, Hz

in diameter, with a spherical siu-face having a radius of about 50 cm.

(f) The hammer should strike the floor only

' International Organization for Standardization Recommendation R140, "Field and Laboratory Measiarements of Airborne and Impact Sound Transmission," 1st ed., Jan. 1960.

Figure 3. Tapping machine used for generating sound

field for impact sound transmission measurements.

The five 0.5 kg hammers fall 4 cm to the floor and produce 10 impacts per second.

731-163 O—64 2
once each time it is released and should always

fall through an effective height of 4 cm.

(g) In the case of a fragile floor covering, hammers should be used which have the striking part

coated with a layer of rubber, of which the di- mensions, composition and vulcanization are specified.^ The space average sound pressure levels in the room below the floor-ceUing test panel are determined in octave wide frequency bands from 75 to 4800 Hz, with a reference sound pressure of 0.0002

dyne/cm^, and are adjusted to a reference absorption of Ao=10 m^ or 107.6 ft^ by the addition of

which depended upon the sound pressure level in

the room containing the tapping machine. That

method of measurement has been superseded by

the method described in the preceding section.

The differences in the methods of measuring the

impact sound pressure levels and the tapping loss are such that the conversion of numerical values

from one to the other is not feasible. In this Monograph, a computed overall value

(OA), which is the sum total of the energy contributions of each frequency band, is reported. In

addition, an impact noise rating (INR) is reported

as wiU be described in the next section.

10 logio (jWo) measured levels, where A 7. Impact Noise Ratings (INR)

is the absorption in the receiving room expressed

in sabins.

6. Discussion of Single- Figure Ratings

of Impact Sound Insulation

Impact test results presented as tapping loss in. BMS Report 144, were obtained by a method

The Federal Housing Administration has pubUshed a guide to impact noise control in multifamily dwellings.* The guide contains a curve of

the recommended maximum impact sound pressure

levels (ISPL) as measured in the room below

floor-ceiling constructions, and a single figure,

impact noise rating (INR) indicating the degree

' International Organization for Standardization Recommendation R140, "Field and Laboratory Measurements of Airborne and Impact Sound

Transmission," 1st ed., Jan. 1960.

, 8 "Impact Noise Control in Multifamily Dwellings," FHA No. 750, for sale by the Superintendent of Documents, U.S. Government Printing

Office, Washington, D.C., 20402, price 50 cents.

80 -

INR = -3

C: INR = -5

Figure 4. FHA Recommendation Curve

with the measured impact sound pressure

levels (ISPL) of four typical constructions and their single figure impact noise

rating (INR).

[FHA curve should be raised 5 dB for use with octave- band data.]

I I I

I l_l I l_l l_L

100 160 250 4 00 630 1000 1600 2500

125 200 315 500 800 1250 2000 3150

4

l/3-OCTAVE BAND CENTER FREQUENCY, Hz
of acceptance or nonacceptance, as well as

I descriptions and data of many constructions.

Figure 4 shows the FHA Recommendation Curve

along with the measured ISPL values of four

iljj typical constructions and their INR ratings.

,n In accordance with these recommendations,

! ,i acceptability of a construction would be deterj'j mined by the following rules:

,1,1 (1) The measured ISPL curve may not exceed

the recommended curve by more than 8 dB at any

frequency.

„; (2) The mean deviation in the unfavorable

I i sense may not exceed 2 dB as averaged over the

j i sixteen 1/3-octave bands between 100 and 3150 Hz.

The impact noise rating (INR) may be determined by moving the FHA curve up or down until

the measured ISPL curve meets the above re- quirements. To further illustrate these points,

: consider construction "A" in figure 4; it obviously

meets the recommendation, and in fact, the FHA ' curve may be shifted downward 4 dB without

' exceeding the allowable deviation ; thus the conj struction is given an INR =+4. Construction

•"B" meets the recommendation with a mean

excess ISPL of less than 2 dB and does not exceed

; 8 dB at any frequency, hence an INR =0. Con-

'struction "C" has a mean excess ISPL (reading

from left to right) of

4 +7 +8+9 + 10+9 +9-^8+6+4+2 76 „ ,^

16 =16^-^^

and the construction fails on several counts

(1) the ISPL exceeds 8 dB at several frequencies and (2) the mean deviation is greater than 2 dB.

However, if the FHA recommended curve were moved 5 dB upward, the measured ISPL would

be within the tolerances, and the structure rates INR= — 5. The measured ISPL of construction

"D" exceeds the FHA curve by more than 8 dB

at some frequencies, and consequently is given an INR=-3.

Since the measured sound pressure levels are a

function of the absorption of the receiving room,

the data in the tables are normalized to a reference

absorption of Ao=10 m^ or 107.6 ft^ In the FHA No. 750 Guide, the data are nor- malized to a reference reverberation time To=0.5

sec. The distinction between the two normahzation methods becomes significant with large

departures from a receiving room volume of 1100

ft^; however, the laboratory test results reported

m this Monograph were obtained in a 1200 ft^ room, in which case the two normahzation methods

yield results agreeing within 0.5 dB.

5
PANEL 616

Panel 616. S- by SO- by 8^-in. solid wooden door; sponge rubber gaskets, approximately }i by }i in., around sides and top

of door jamb; sponge rubber drop closure was installed in bottom of door.

PANEL 617

Panel 617. zy-i- by 36- by 84-in. solid wooden door; 2 felt drop closures installed in bottom of door; two cylindrical foam

rubber gaskets Yi-in. diam, covered with a plasticized fabric, mounted on door jamb, provided a double seal along top and sides. Panel 618. ^H- by 36- by 84--in. wooden door with SSYt,- by 70%-in. panels set into Yi-in. resilient rubber which separated

the panels from the door frame {similar to panel 620) . Gaskets and drop closures similar to those used with panel 617. Panel 619. 1%- by 36- by 84-in. wooden door similar to panel 620. Rectangular sponge rubber gaskets % by Yie in. on

door stops, Yi-in. surface making contact with the door, provided seal at top and sides; sponge rubber drop

closure was installed in bottom of the door.

PANEL 620

Panel 620. 2Y- by 36- by 84-in. wooder. door with Y- by 25y»- by IQYi-in. plywood panels set into Yi-in. resilient rubber which separated the panels from the door frame. The plywood panels ivere backed with a laminated layer of damping material. The seals and drop closure were similar to those used with panel 619. Panel 621. 3- by 36- by 84-in. wooden door similar to panel 620. Rectangular hard rubber gaskets used instead of sponge

rubber on doorstops. A sponge rubber drop closure was installed in bottom of door. Panel 622. Same as panel 621, except cracks between the door and doorjamb were completely sealed around the

four edges on the side opposite the gaskets with a soft clay caulking compound.

Panel 623. Same as panel 621, except the hard rubber gaskets were replaced by soft sponge rubber gaskets.
Table 1. Airborne Sound Transmission Loss—doors

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

lb/ft"

616 31 27 32 30 33 31 29 37 41 *30 7. 0

617 28 31 27 22 28 27 28 34 32 *28 5. 6

618 27 32 33 31 36 35 32 39 34 *33 6. 8

619 28 36 31 30 32 31 32 37 37 *33 4. 3

620 26 31 30 30 33 32 29 36 38 *30 6. 8

621 30 38 34 33 40 36 34 43 42 *35 7. 3

622 32 40 35 38 44 44 46 49 55 *44 7. o

623 30 38 36 35 41 38 37 45 46 *38 7. 3 *STC based upon nine test frequencies.

7
PANEL 624

Panel 624. 3- by 36- by 84-in. wooden door similar to panel 621, except the gasket was corrugated sponge rubber and glued

to the doorstop with a lap joint, as illustrated. A sponge rubber drop closure was installed in bottom of door. Panel 625. 2y2- by 36- by 84--in. wooden door similar to panel 620, with same type gaskets as those used with panel 624. A sponge rubber drop closure was installed m bottom of door. The door was completely sealed

around the edges on both sides with a soft clay caulking compound.

Panel 626. /%- by 36- by 84-in. wooden door similar to panel 626, including gaskets and drop closure. The door was completely sealed around the edges on both sides with a soft clay caulking compound.

Panel 630.

Panel 631.

Panel 632.

PANEL 630

2y2- by 36- by 84-in. wooden door with a lYi-in.-thick core; on each side, Y^-in. seven-ply panels with Y^-in. sponge

rubber centers; panels backed with laminated layer of damping material. Corrugated sponge rubber gaskets similar to those of panel 624 were used, and a sponge rubber drop closure was installed in bottom of the door. The door was completely sealed around the edges on the side opposite the gaskets with a soft clay caulking compound.

PANEL

2^2- by 36- by 84-in. wooden door with a lYi-in. core; on each side, Yi-in. panels installed in rubber gaskets and

recessed Y» if-- below face of core; panels backed with laminated layer of damping material; Ys-in. plywood

panels applied to both sides of core assembly, with Ys-in. cork between inner and outer panels. Corrugated sponge rubber gaskets on doorstops, such as with panel 624, and a sponge rubber drop closure were used. The

edges of the door on side opposite gasket were completely sealed with a soft clay caulking

compound.

lYi- by 36- by 84-in. wooden door with a solid core. Corrugated sponge rubber gaskets on doorstops, similar

to panel 624, and a sponge rubber drop closure were used. The edges of the door on side opposite

gasket were completely sealed with a soft clay caulking compound.

Panel 633. lYi- by 36- by 84-in., veneer face flush type, wooden door with hollow core installed in conventional manner, i.e., Yi-in. airspace at bottom, no drop closure, and no gaskets on Yie-in. wooden doorstop.

Panel 634. Same door as panel 633, except all edges on side opposite doorstops were completely sealed with a

soft clay caulking compound.
Table 1. Airborne Sound Transmission Loss—doors—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

lb/ft2

i. ' ^ 0\J\J 1 0\J\J 9000 4.000

28 32 34 34 38 38 37 42 43 *38 7. 3

625 25 32 36 35 38 39 43 48 54 *41 6. 8

28 30 31 30 31 29 32 39 45 *32 4 3

630 32 33 36 36

' 37 34 34 36 38 35 38 35 7. 7

631 35 32 36 24 36 36 39 44 43 38 40 30 8. 2

632 30 34 30 29 30 28 29 33 38 41 44 30 4. 6

633 14 18 19 17 23 17 18 18 17 16 21 18 1. 9

634 19 22 22 19 24 19 1 19 1 20 20 21 29 20 1 1.

9

*STC based upon nine test frequencies.
Panel 635.

Panel 636.

Panel 637. Panel 638.

2y2- by 36- by 84-in. wooden door similar to panel 631, except Ys-in. cork layer omitted between inner and outer panels. Door mounted in conventional manner, i.e., %-in. airspace at bottom, no drop closure, and no gaskets on wooden doorstops.

Same as panel 635, except corrugated sponge rubber gaskets were applied to doorstops, and the edges on

side opposite gaskets were sealed with a soft clay caulking compound at the top and two sides;

yi-in. airspace at bottom.

PANEL 637

Same as panel 636, except a sponge rubber drop closure was installed in bottom of door. Same as panel 637, except all four edges on side opposite gaskets were sealed with a soft clay caulking compound.

Panel 639.

Panel 640. Panel 641. Panel 642.

PANEL 639

^Yi- by 36- by 84--in. wooden door of double construction with two interlocking frames separated by }i-in.-ihick

felt sheet; a viscous damping material applied to inner panel faces. Two cylindrical foam rubber gaskets,

Ys-in. diam, covered with a plasticized fabric, provided a double seal along top and sides; similar gaskets closed onto a tapered wooden threshold to provide seal at bottom.

PANEL 640

2Ys- by 36- by 84-in. wooden door similar td panel 639, except seals at bottom were replaced with two felt drop

closures which closed onto a flat wooden threshold, as shown.

4- by 36- by 84-in. wooden door; construction and seals similar to panel 640. Same as panel 641, except door was completely sealed on both aides with plaster.

10
Table 1. Airborne Sound Transmission Loss—doors—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

26 26 24 20 27 26 25 24 26 24 22 24 7. 8

636 27 26 30 25 31 29 30 31 31 26 24 26 7. 8

637 31 29 30 26 36 34 35 38 38 36 38 32 7. 8 638 31 30 32 24 38 35 36 36 40 37 38 30 7. 8

639 31 30 35 29 36 34 36 39 44 47 48 35 7. 3

640 34 30 35 30 32 32 33 36 42 42 38 34 6. 6

641 34 32 37 26 39 43 42 45 51 53 53 42 12. 3

642 39 37 41 40 45 47 50 54 56 58 62 46 12. 3

11

731-163 O—64 3
PANEL 643

Panel 643. 5%- by 56- by TSYi-in. metal-clad door. Front panel consists of Yi-in. plywood, Ym-in. asbestos paper, and 16

gage steel; back panel has ^-tn. plywood, a layer of damping material, and 16 gage steel; cork fill in 4-in. space between panels. Half-oval molding at top and sides of door closed against a Ya- by 2- by 2-in. steel angle lined with Yi-in. neoprene foam rubber gasket; two neoprene tubular gaskets attached to door helped to provide seal around all four edges; in addition, at the bottom of the door a by 2-in. neoprene foam rubber

gasket closed against a half-oval metal threshold.

PANEL 644

Panel 644. Metal-clad double door, 5% by 55Y2 by 73% in. overall; door construction and seals similar to panel 6^3, except

the two tubular gaskets at bottom were replaced by a Yi-in.-thick foam rubber drop closure. The seal between

the two doors was provided by a neoprene tubular gasket and a by 4-in. neoprene foam rubber gasket; a

Yi- by 2-in. neoprene foam rubber gasket attached to overlapping flange sealed joint.

PANEL 645

Panel 645. iYi- by 29Y2- by 77y2-in. door with unperforated sheet metal faces, mounted in a metal frame; void between faces

filled with sound-absorptive material. Frame Hanged with Yie- by lY\f,-in. sponge rubber gaskets around top and sides; door similarly Hanged with rubber around four edges; additional seal at bottom provided by %-in.

solid rubber strip, held by an adjustable retainer, closing onto a metal threshold.

12
Table 1. Airborne Sound Transmission Loss—doors—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

lb/ft2 125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

643 41 35 40 43 49 50 52 54 57 60 64 49 23. 8

fi44 36 32 41

•

44 48 52 53 54 56 58 61 50 30. 7

645 33 30 31 28 31 31 33 38 38 42 42 1 3* 13. 0
Panel 646.

PANEL 646

60- by llrin. accordion-type folding door. On each side, 20 vertical panels, forming 10 pleats, made of five-ply

laminated material, i.e., outside ply of vinyl, three composition board core plys, and inner ply of impregnated

sheeting; panels held on vertical steel pantographs. Liners of Yg-in. composition board covered with thin felt attached inside of panels. Rubber sweep strips attached to external covers at top and bottom on both sides, and a half-round rubber bumper on vertical edge, which closed into two Yi-in. sponge rubber strips on frame

molding, sealed the door.

PANEL 646-A

Panel 646-A. Same as panel 646 except the liners were removed, as well as the sweep strips at top and bottom on one side only.

Panel 651.

PANEL 651

2)4- by 35%- by TSYi-in. wooden door with Yi- by ^SYs- by 66Yi-in. panels mounted in rubber similar to panel 620,

p. 6. Seals similar to those illustrated with panel 624, p. 8. Sponge rubber drop closure installed in

bottom of door; rubber was % in. high and Ys in. wide with a concave bottom surface.

Panel 652. by 36- by 84-in. door constructed of two panels held in a solid wooden frame; panels were Ys-in.-thick particle

j board composed of wood, silicates, and binder; density approximately 4-1 -2 Ib/ft^. The inner faces of the panels were coated with a bedding compound and Yin-in. felt building paper which extended around all four

edges of each panel; approximately Yi6-in. airspace between panels; the outer faces finished with Y»-in.-thick hardwood veneer. Tubular soft rubber gaskets, Yn thick and approximately Y2 in. in diameter, stapled to

y2- by lYu-in. wooden doorstops provided seal around top and sides; a sponge rubber drop closure with Y^-ii^- concave surface installed in bottom of door. 14
Table 1. Airborne Sound Transmission Loss—doors—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

lb/ft2 125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

646 20 18 18 19 24 29 31 31 32 32 35 25 2. 0

646-A 18 16 15 15 16 20 25 26 27 29 32 21 1. 1

651 30 30 28 31 33 36 36 40 42 45 46 37 6.9

652 29 31 29 29 31 30 29 29 1 30 35 1 40 29 6. 0

15
PANEL 653

Panel 653. 2- by 36- by 84.-in. metal door mounted in a 2- by jyi-in. "U" channel frame backed with l-in.-thick fiberglass

padding. The door was constructed of 18 gage sheet metal coated on the inside surfaces with an asphaltic

compound and strengthened with vertical "Z" stiffening members, 7 in. on centers; %-in.-thick fiberglass insulation held by 24 gage perforated sheet metal liner on each side; \'2-in. airspace between inner liners;

Ys- by 2-in. asbestos strip at each edge. The door closed against soft sponge rubber gaskets, Ys- by 2-in., held by metal angle retainer at top and sides; two %- by ^^7171. sponge rubber drop closures installed in bottom of

door.

PANEL 654

Panel 654. 6-in.-thick metal door with lapped closure, such that hinge side area was 4^}^ by 84}i in. and doorstop side area was 42 by 81 in., mounted in }i- by 8-in. steel lap closure channel frame. The door was constructed of 18 gage

metal sheets held by an inner wooden frame at the edges; 14 ga,ge septum sheet placed between the two faces formed two chambers which contained mineral wool fill, density approximately 10.5 Ibjft^; Ys-in.-thick felt liner along edges of one face separated it from the other face. The door closed against two vinyl-covered soft rubber gaskets mounted on lap closure at top and sides; inner gasket P/i by Yi in., and outer gasket IY2 by Yi in.; bottom seal provided by a double layer of Yi-in.-thick rubber held in an adjustable metal housing.

PANEL 608

Panel 608. ^e- and Yi6-in.-thick steel plates separated by Yi-in.-thick cork, under compression, in a panel with outside dimensions 59 by 77 by lYs in.; Yi^-in.-diam steel studs penetrated Yi-in. cork and were welded to both steel plates; studs were placed approximately I2Y2 in. on centers vertically and llYs in. horizontally.

Panel 609. Similar to panel 608, except the cork was replaced with an insulating material of polyvinyl acetate with cork

granules, approximate density 0.6 Ib/ft^. 16
Panel No.

653.

654.

Table 1. Airborne Sound Transmission Loss—doors—Continued

125

36

36

Airborne sound transmission loss (in dB) at frequencies (Hz)

175

36

37

250

39

43

350

40

44

500

35

50

700

36

48

1000 1500

38

46

2000

36

52

3000

57

4000

37 43

61

STC

Weight

lb/ft2

44

61

36 3. 4

47 23. 0

Table 1-A. Airborne Sound Transmission Loss—miscellaneous structures

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

lb/ft2 125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

608 46

46

42

42

45

45

44

44

50

48

46

48

42

46

48

51

53

55

*43

*47

36. 7

609 37. 0

*STC based upon nine test frequencies.

17
PANEL 610

Panel 610. Similar to panel 608, except the outside dimensions of the panel were 71 by 89 in., and a 2- by ^2- by 42-in. glass

window was, placed in the panel center. The window was mounted in rubber gaskets and held in place with a metal retaining frame screwed to the panel.

Panel 611. Double-wall construction with a 4-in. airspace. One wall was panel 610 and the other wall consisted of Yiq- and Yis-in.-thick steel plates separated by Yi-in.-thick cork, under compression, in a panel with outside dimensions of 59 by 77 in.; a 2- by 42- by 42-in. glass window was placed in the panel center, as in panel 610.

PANEL 614

Panel 614. Double-wall construction with a 4-in. airspace. One wall consisted of Yt- by 59- by 77-in. steel plate with a Ys- b', 42- by 42-in. glass window in the panel center. The other wall, with outside dimensions 71 by 89 in., con

sisted of YiQ-in. and Yzi-in. steel plates separated by Yie-in. insulating material of polyvinyl acetate with cor. granules; Yu-i''^ --diameter studs, 12 in. on centers, penetrated the insulator and were welded to both plates a Yi- by 4^- by 42-in. glass window was placed in the panel center. (Glass windows mounted as in pane

610.)

Panel 615.

Panel 627.

PANEL 615

Double-wall construction with %-m. airspace. One wall consisted of a Yie-in. steel plate with lYi- by lY*- b\ Yi-in. angle welded to it. The other wall was a Yi6-in. steel plate held in a channel, lined with by %-in. rubber under compression, formed by welding two pieces of steel 2 by %6-*Vi. to the angle.

PANEL 627

Section of outer part of aircraft fuselage ; 0.090-in. -thick aluminum alloy skin,

ing members not shown in drawing.

The panel included some stiffen18
Table 1-A. Airborne Sound Transmission Loss—miscellaneous structxjees—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

610.

611.

614.

615.

627.

44

58

54

38

22

40

50

51

34

16

42

53

50

40

14 *STC based upon nine test frequencies.

7ai-l«3<

44

58

56

42

18

45

58

55

46

24

45

59

58

45

23

47

64

60

44

23

52

64

62

51

23

55

66

67

23

*48

*62

*59

47 *45

*23

19
PANEL 628

Panel 628. Section of outer part of aircraft fuselage; 0.090-in.-thick aluminum alloy skin. The panel included some Stiffen- ing members not shown in drawing.

PANEL 629

Panel 629. Section of outer part of aircraft fuselage; outer skin 0.080-in.-thick and inner layer 0. 063-in. -thick aluminum

alloy. The panel included some stiffening members not shown in drawing.

Panel 647.

Panel 648.

PANEL 647

Zy-rin.-thick movable partition composed of 36- by 88-in. tongue-and-groove panels set into a steel "U" channel frame Yia in. thick, in. wide, and 1 in. deep. Each panel was constructed of two ^Yi^-in. -thick layers of

particle board composed of wood, silicates, and binder, approximate density 41.2 lb/ft ^, separated by a Y^-in. airspace; both sides of particle board veneered with jis-in. -thick birch. The particle board layers were secured

to an internal wooden frame of interlocking members separated by a Yi-in.-thick layer of felt; also an "L"-

shaped strip of Ys-in.-thick felt was attached to all four edges of one particle board layer; a laminated layer of damping material applied to inner faces adjoining the airspace. The "U" channel frame sealed in

test opening with plaster.

PANEL 648

lYrin.-lhick movable partition composed of 36- by SSyi-in. panels. The panels were made of lYi-in.-thick

particle board composed of wood, silicates, and binder, approximate density 31.2 Ib/ft^; the particle board

panels were connected with a }{- by ^Yit-in. wooden spline backed with a Yw by Yi-in. felt strip; the seam

was caulked on both sides, and the edges sealed in test opening with plaster.

Panel 649. lYi-in.-thick movable partition composed of 55%- hy 84-in. panels set into an aluminum "U" channel frame Yi thick, 2 in. wide, and lY* in. deep, lined with two Ytr by Ys-in. sponge rubber strips. Each panel was constructed

of two layers of Yi-in.-thick particle board, approximate density 41.2 Ib/ft^, separated by J^e-Mi. airspace; the opposing internal faces were coated with bedding compound and a Yu-in.-thick layer of 55-lb felt building paper

which extended around all four edges of the particle board layers, l-in.-wide metal runners were screwed to inner edges of the panels and lYi-in.-wide metal bridging strips, placed 15 in. on centers vertically, locked the panels together; the space between the runners was filled with mineral wool; Ys- by lYv by 84-in. plywood strips, held to runnels with spring clips, covered the joint. The bottom edges of the panels were supported by leveling screws leaving a 4-i'n- space which was filled with mineral wool and covered with Y»- by 5-in. plastic base plates screwed to external faces of partition.

20
Table 1-A. Airborne Sound Transmission Loss—miscellaneous structures—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz) w eiguii

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

lb/ft2

628 23 17 15 20 19 18 23 24 26 *21 2. 6

629 23 17 13 20 25 22 24 29 27 *25 2. 5

647 28 25 31 31 35 34 34 32 37 45 52 32 7. 4

648 25 25 24 26 26 26 24 24 28 31 34 24 4. 0

649 30 27 28 31 33 • 36 32 33 35 41 46 1 33 6. 0

*STC based upon nine test frequencies. 21
71

PANEL 650

Panel 650. S-in.-thick movable partition consisting of ^yi-in. metal studs placed 24 in. on centers and braced with horizontal metal bridging members, approximately 20 in. apart. 24- by 79-in. §20 gage steel panels backed with Yi-in.- thick insulation board snap-fitted to the studs; each side of the partition was finished with a S%-in. metal cornice

section at the top; the 5}i-in. airspace at the bottom covered on both sides with 6-in.-wide base sections clipped to the stud bases. The perimeter edges of the partition were sealed on both sides with a soft clay

caulking compound.

PANEL 655 PANEL 656

Panel 655.

Panel 656.

4y»-in.-thick movable partition consisting of 3%-in. metal studs placed 24 in. on centers and braced with horizontal metal bridging members, approximately 24 in. on centers. On each side, Y«- by 48- by 84-in. gypsum wallboard

panels screwed, 8 in. on centers, to studs; all joints taped and finished. The partition was finished with

2-in.-wide metal cornices at the ceiling edge.

SYi-in.-thick movable partition similar to panel 665 except 2)4rin. metal studs were used, and Y»- by ^4- by 84-in. gypsum wallboard panels were attached to the studs with lYi-in.-wide metal "T" bar batten strips. Both sides of the partition were finished with 2-in.-wide metal cornices at the ceiling edge and 6-in.-wide metal base cover

plates. Panel 657. 3-in.-thick movable partition similar to panel 656 except the gypsum wallboard was replaced with Yv by 24- by

79-in. asbestos-cement board panels; the 5-in. airspace at the bottom was covered by 6-in. base cover plates.

PANEL 658

Panel 658. SYs-in.-thick partition of "shadow-box" construction consisting of Yi^- by 2Y4-in. aluminum framing vnth Yte-in. thick transparent plastic panels bonded to both sides. 22
Table 1-A. Airborne Sound Transmission Loss—miscellaneous structures—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

lb/ft2

21 25 31 37 43 48 50 51 51 54 58 41 4. 6

25 30 27 30 34 37 39 39 36 37 41 36 6. 1

656 24 28 26 28

' 32 38 42 43 36 37 42 34 6. 4

657 22 24 18 20 24 33 35 30 31 29 31 26 5.8

658 14 18 25 28 28 33 40 43 46 49 51 32 2. 9
PANEL 250

Panel 250. by 23- by 23-in. hollow plastic panels with Yii-in.-thick skin, supported and joined with 2-in. aluminum

and hardboard "H" beams; ea^h panel surface contained 800 horn-shaped depressions of two sizes arranged in

alternating rows l}i in. on centers, one size depression tapered in diameter from % in. to % in. with a depth of % in., and the other tapered in diameter from }i in. to %6 in. with a depth of ]4 in.

PANEL 237 PANEL 238

Panel 237. Staggered 2- by 4-in. wood studs, each set 16 in. on centers and spaced 8 in. on centers with )4 in. offset from the other set. On each side Vs-in. plain gypsum lath nailed to studs, Yi-in. gypsum vermiculite plaster, machineapplied, and a hand-applied white-coat finish. Panel 238. Same as panel 237 except space between studs contained vermiculite fill. Density of fill was 6.3 lb/ft \

PANEL 239 PANEL 240

Panel 239. 2- by Ji.-in. wood studs 16 in. on centers; Ys-in. perforated gypsum lath nailed to studs, }i-in. sanded gypsum

plaster with white-coat finish. Panel 240. 2- by 4-in. wood studs 16 in. on centers; tapered-edge gypsum wallboard nailed 7 in. on centers; joints

taped and finished.

PANEL 241

Panel 241. 2- by I^-in. wood studs 16 in. on centers; two layers of ^-m. tapered-edge gypsum wallboard, first layer nailed 7 in. on centers and second layer 14 in. on centers; joints taped and finished.

24
Table 1-A. Airborne Sound Transmission Loss—miscellaneous steuctures—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

lb/ft2 125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

250 20 18 16 19 24 26 32 36 32 28 29 25 1. 7

Table 2. Airborne Sound Transmission Loss—walls

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

lb/ft2

237 36 37 33 39 42 40 42 41 51 *43 11. 1

238 37 37 37 42 49 49 50 52 66 *48 12. 8

239 42 34 32 38 42 47 49 46 50 58 62 44 14. 2

240 30 22 31 30 37 39 44 43 39 45 52 36 7. 2

241 33 28 30 36 37 40 45 42 44 50 57 41 12. 9

*STC based upon nine test frequencies.

25
^ ^ ^ V V V"

PANEL 242

Panel 242. 2- by 3-in. wood studs 16 in. on centers, staggered; Yi-in. tapered-edge gypsum wallboard nailed 7 in. on centers; joints taped and finished. Panel 243. 2- by 3-in. wood studs 16 in. on centers, staggered; y«-in. tapered-edge gypsum wallboard nailed 7 in. on centers; joints taped and finished.

PANEL 244

Panel 244. 2- by S-in. wood studs 16 in. on centers, staggered; two layers of y«-in. tapered-edge gypsum wallboard, first layer nailed 7 in. on centers and second layer 16 in. on centers; joints taped and finished.

\ \ \ \ \ \ \ \ \ \ \ A \ A \ A' \ \ 5 K V.V V \ A \ \' V A \ \ \ V \ \ \ \ V

Panel 245. 2-

PANEL 245

by 3-in. wood studs 16 in. on centers, staggered; by 16- by 1,8-in. perforated gypsum lath, )i-in. sanded

gypsum planter including white-coat finish.

PANEL 251

Panel 251. 2- by ^-in. wood studs 16 in. on centers, Ys-in. plain gypsum lath nailed to studs, Yrin. sanded gypsum plaster with white-coat finish.

1

PANEL 247

Panel 247. sy^-in. steel studs, 16 in. on centers, attacfiedlo top and bottom by stud shoes, starter clips, and stud tracks; gypsum

wallboard (backer board) %- by 24-in. clipped to studs with galvanized wire clips; edges of wallboard held

together by galvanized steel clips [see "D clip, p. 44 of BMS Report 144]; Yr by 48-in. gypsum wallboard laminated to the inner layer with joint cement.

26
Table 2. Airborne Sound Transmission Loss—walls—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

lb/ft2 125 175 250 350 500 700 lOOO 1500 2000 3000 4000 STC

36 31 36 40 40 46 47 50 52 41 45 44 6. 2

43 44 37 38 40 46 48 47 41 44 50 44 7. 7

244 41 41 41 43 46 48 49 45 41 49 54 44 13. 4

245 48 48 46 47 48 47 48 43 48 55 59 43 15. 6

30 34 42 41 40 44 48 39 39 44 51 39 13. 4

247 . 35 34 39 43 44 49 50 51 50 47 51 48 7. 5

27
PANEL 438

Panel 438. ^Yr- by Y-rin. steel studs placed 16 in. on centers with stud shoes urire-tied to steel runners. Galvanized wire clips attached to studs on both sides, held Ys-in. plain gypsum lath, joined with sheet metal clips, Yu-in. gypsum

vermiculite plaster, and Yirin. white-coat finish. {Sheet metal clip similar to "D" clip, p. 44^ of BMS

Report 144-)

PANEL 313

Panel 313. 3- by 12- by SO-in. hollow gypsum blocks cemented together, }i-in. mortar joints. On one side Yn-in. sanded gypsum plaster; on the other side resilient clips, spaced 18 in. on centers vertically and 16 in. on centers horizontally, held %-in. metal channels 16 in. on centers, to which expanded metal lath was wire-tied; 'J^e-iVi. sanded gypsum plaster. Y^-in. white-coat finish applied to both sides. {Clip similar to one illustrated with panel 428, p. 22 of BMS Report 144.) Panel 317. Similar to panel 313, except 4- by 12- by SO-in. gypsum blocks were used.

PANEL 314

Panel 314. 3- by 12- by 30-in. hollow gypsum blocks cemented together, Yi-in. mortar joints. On one side Yi^-in. sanded gypsum plaster; on the other side resilient clips, attached with 2-in. staples 16 in. on centers both vertically and horizontally, Ys-in. plain gypsum lath and Via-in. sanded gypsum plaster; Yi6-in. white-coat finish applied

to both sides. Panel 318. Similar to panel 314, except 4- by 12- by 30-in. gypsum, blocks were used.

PANEL 315

Panel 315. 3- by 12- by 30-in. hollow gypsum blocks cemented together, ]4-in. mortar joints. On one side lii-in. sanded gypsum plaster; on the other side resilient clips, attached with 2-in. staples placed 21 in. on centers horizontally

and 28% in. on centers vertically, held Y^-in. horizontal metal channels wire-tied 28Yi in. on centers to clips,

Yi-in. "V" edge long-length gypsum lath wire-tied to channels, and 'J^e-in. sanded gypsum plaster; Yi6-in. white-coat finish applied to both sides. {Clip similar to one illustrated with Panel 4^S, p. 22 of BMS Report 144-) 28
Table 2. Airborne Sound Transmission Loss—walls—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

lb/ft' 125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

438 27 26 28 32 39 41 44 38 49 *38 9

313 38 40 37 40, 44 48 51 56 59 *46 27

317 45 44 44 47 50 53 55 56 59 *53 31

314 42 41 43 46 48 51 53 56 60 *52 24

318 43 41 42 46 52 52 56 55 61 *52 26

315 48 43 41 43 47 48 44 55 62 *45 27

*STC based upon nine test frequencies.

29
PANEL 316

Panel 316. S- by 12- by 30-in. hollow gypsum blocks cemented together, Yi-in. mortar joints. On one side Vie-in. sanded

gypsum plaster; on the other side slotted resilient metal furring runners placed 25 in. on centers, nailed to mortar joints 12 in. on centers, yi-in. long-length gypsum lath wire-tied to the runners, and ^Yie-in. of sanded gypsum plaster; Yu-in. white-coat finish applied to both sides. Panel 319. Similar to panel 316, except 4- by 12- by 30-in. gypsum blocks were used.

PANEL 439

Panel 439. 2- by 4-in. wood studs 16 in. on centers; sheet metal resilient clips, nailed to studs on both sides, held Yi-in. gypsum

lath, Yw-in. sanded gypsum plaster, and Y^-in. white-coat finish. 2

PANEL 440

Panel 440. Five layers of %-m. cold-rolled steel channel, wire-tied together, formed core of panel. The center layer consisted of two pieces of channel 2 in. long placed vertically J^O in. apart and wire-tied between two horizontal

lengths of channel. Vertical channels 16 in. on centers were wire-tied to the horizontal channels; Yi-in. plain

gypsum lath, 16 in. wide, was wire-tied to vertical channels, with lath joints held by sheet metal clips; J'i-m. sanded gypsum plaster with white-coat finish applied to both sides. (See "D" clip illustration on p. 44 of BMS Report 144-)

PANEL 441

Panel 441. 2Yi-in. steel trusses, 16 in. on centers; on each side resilient clips fastened to studs 16 in. on centers, Yi-ii^- metal

rod wire-tied to clips, and metal lath wire-tied to metal rods. %-m. sanded gypsum plaster, including whitecoat finish, applied to both sides. (Similar to panel 429, p. 50 of BMS Report 144-) Panel 442. 2- by 4-in. wood studs placed 16 in. on centers. On each side resilient clips, nailed to studs, held Yi-in. plain

gypsum lath, Vn-in. sanded gypsum plaster, and Yia-in. white-coat finish. (Similar to panel 439, above.)

30
Table 2. Airborne Sound Transmission Loss—walls—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weieht

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

lb/ft2

316 41 40 40 43 46 44 46 58 61 *47 26

319 41 41 40 43 49 49 49 57 62 *49 26

439 43 38 41 47 48 48 50 44 42 51 56 44 14. 4

440 46 42 44 48 54 55 55 48 50 57 62 48 13. 5

441 49 48 49 51 53 56 59 53 58 63 63 53 18. 6

442 47 47 46 45 52 55 55 44 42 52 57 44 12. 4

*STC based upon nine test frequencies.

31
PANEL 443

Panel 443. Similar to panel 44^ with different resilient clips, as illustrated.

PANEL 444

Panel 444. ^J^-in. steel studs held 16 in. on centers by stud tracks and stud shoes at top and bottom. On each side, resilient clips held Yt-in.-diameter pencil rods with 3.4 Ib/ft^ diamond-mesh metal lath wire-tied to rods, ^Yie-in. sanded gypsum plaster, and Yia-in. white-coat finish.

PANEL 445

Panel 445. 2- by 4-in. wooden studs, 16 in. on centers, with resilient clips nailed to both sides. The clips held by 24-in. gypsum backer board, mounted horizontally with opposing joints staggered, and yi-in. wallboard laminated

to backer board with joint cement; all joints taped and finished.

PANEL 446

Panel 446. ji-in. steel channel studs spaced 16 in. on centers. On one side resilient clips, attached 16 in. on centers to studs, held Yi-in.-diameter pencil rods with 3-4 Ib/ft^ diamond-mesh metal lath wire-tied to rods. On the other side,

the metal lath was wire-tied directly to the steel channel studs, '^le-in. sanded gypsum plaster and Me-JWwhite-coat finish applied to both sides. Panel 447. lYs- by Y-in. steel studs held 16 in. on centers top and bottom by metal tracks; studs held Ys-in. gypsum backer board with sheet metal clips joining the edges. }4-zn. gypsum wallboard was laminated to the backer board

with joint cement, and all joints were taped and finished. A sheet metal base, 2Y2 in. wide, was attached to the bottom on both sides. (Clips and studs similar to those illustrated with panel 438, p. 28.) 32
Table 2. Airborne Sound Transmission Loss—walls—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weight

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

Ib/ft^

443 46 46 44 46 52 55 57 46 43 51 60 46 12. 5

444 45 43 47 49 51 51 48 41 48 54 60 41 21. 7

445 39 36 41 47 48 52 53 55 53 49 54 52 9. 3

446 32 32 40 41 46 47 44 36 42 46 51 36 18. 9

447 21 24 33 35 41 42 46 49 46 47 51 41 8. 4

33
'^y////// j 1 ...//////,

(Cs.ii.ui

PANEL 448

Panel 448. 1%-in. steel channel studs placed 16 in. on centers in ceiling and floor tracks; studs had P/s-in.-diameter holes ' | 4 in. on centers. Galvanized wire loop clips, attached 16 in. on centers to both sides of the studs, held %- by

16- by 48-in. perforated gypsum lath; edges of lath joined with sheet metal clips. Jia-in. sanded gypsum

plaster and Yu-in. white-coat finish applied to both sides. The airspace between lath faces measured approximately lYi in., and the completed panel about SY in. thick.

PANEL 449

Panel 449. Similar to panel 448, except ^^i-in. truss type metal studs replaced channel studs; the gypsum lath was held by

resilient clips. The airspace between lath faces measured approximately SYt. in., and the completed panel

about 6Yi in. thick.

PANEL 450

Panel 450. 2- by 4-in. wooden studs, 16 in. on centers, with resilient runners nailed horizontally to the studs 24 in. on centers.

Yi-in. gypsum wallboard screwed, 12 in. on centers, to resilient runners; all joints taped and finished.

34
Table 2. Airborne Sound Transmission Loss—walls—Continued

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

Weiesnt

lb/ft2 125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

448 34 33 33 37 41 42 44 36 38 46 51 36 13. 1

449 47 44 41 46 44 49 49 38 40 50 54 38 14. 4

31 32 32 33 39 45 51 47 42 40 45 39 6. 8

35
PANEL 711 PANEL 712

Panel 711. 2- by 10-in. wooden joists 16 in. on centers, cross-braced with 1- by 3- by 18-in. wooden bridging strips bisecting

length of panel between joists. On ceiling side, Yz-in. gypsum wallboard nailed 8 in. on centers, with all joints

taped and finished. On floor side, %- by 3-in. subflooring, rosin paper, and floating floor consisting of J^- by

2-in. flberboard strips placed 16 in. on centers in line with joists, trapezoidal (lYs in. wide at top, 2 in. at

bottom, lYi in. thick) sleepers nailed 16 in. on centers to fiberboard strips, and in. oak flooring.

Panel 712. Same as panel 711, except space in floating floor contained vermiculite fill. Density of fill was 7.3 Ib/ft^.

PANEL 713 PANEL 714

Panel 713. 2- by 10-in. joists, 16 in. on centers; 1- by 6-in. tongue-and-groove subfioor; 2^2- by 4-in. fir finish floor; ceiling

side, two layers of %-i"n. gypsum wallboard, first layer nailed 6 in. on centers and second layer 12 in. on centers; joints taped and finished. Panel 714. Same as panel 713, except on ceiling side fi-in. perforated gypsum lath; J^-m. sanded gypsum plaster.

PANEL 715

Panel 715. 2- by 8-in. wood joists, 16 in. on centers; Yi-in. subfioor, building paper, and Yi-in. tongue-and-groove fir finish

fioor; ceiling side ji-in. gypsum wallboard nailed to furring strips held by spring clips, the latter nailed to the fioor joists; all joints taped and finished. Panel 716. Same as panel 715, except the Yi-in. wallboard was nailed directly to the fioor joists. Panel 717. 2- by 8-in. wooden joists spaced 16 in. on centers. On the floor side, Yi-in. wood subfloor, a layer of building paper, and tongue-and-groove flr finish fiooring. On the ceiling side, resilient runners bridged across

joists and nailed 12 in. on centers to the joists; ^^-m. gypsum wallboard screwed to resilient runners, with all joints taped and finished. {Resilient runner similar to one illustrated with panel 450, p. 34.)

36
Table 3. Sound Transmission Loss and Impact Sound Pressure Levels (ISPL)—floor-ceiling constructions

Panel No.

Airborne sound transmission loss (in dB) at frequencies (Hz)

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

ISPL (in dB re: 0.0002 dyn»/cm2) normalized to Ao=10 m2 in octave frequency bands (Hz)

75

I 150

150

I 300

300

I 600

600

I 1200

1200

I 2400

2400

I 4800 OA

(dB) INK

Wt.

Ib/ft2

715.

716.

717.

30

24

20

21

29

30

30

33

37

40

28

33

47

34

43

27

32

28

26

40

25

44

34

32

40

24

41

45

30

41

40

41

42

46

50

52

56

58

*36

•=39

32 36

33

52

36

41

39

44

41

51

39

49

48

45

52

48

51

56

54

42

52

58

48

53

58

51

50

59

55

62

36

37

63

51 56

56 60

51

36

45 70 75 72 64 62 57 78

11. 4

12. 6

12. 4

15. 6

9. 8

9. 6

10. 1

*STC based upon nine test frequencies.

37
PANEL

718

PANEL

719

PANEL

720

Panel 718. 2- by 6-in. wooden floor joists spaced 16 in. on centers. On the floor side, Ys-in. plyscore nailed to joists, yi-in. porous wood^flber board {approximate density 20.0 lb/ft stapled to subfloor, yi-in. plywood underlayment

glued to fiber board, and vinyl floor covering glued to underlayment board. On the ceiling side, resilient clips 24 in. on centers held 1- by 2-in. furring strips,' parallel with joists, to which Ys-in. gypsum wallboard was screwed 12 in. on centers; all joints and screwheads taped and flnished. Panel 719. Similar to panel 718, except the ^i-in. plywood underlayment board and the }i-in. wood-fiber board were nailed

directly to the %-in. plyscore subfloor. Panel 720. Similar to panel 718, except the resilient clips were omitted and the %-in. gypsum wallboard was nailed, 7 in. on centers, directly to the floor joists. All joints and nailheads were taped and finished.

TZZZZZZ^^ZZZZZZZZZZZZZZZ^ZZZZZZZZZZZZZZZZZZZZZZZZZc

PANEL 721-A PANEL 721-B

Panel 721-A. 8-in. steel joists spaced 16 in. on centers. {Joists had 2-in.-wide support flanges at top and bottom, 2}i-in. holes SO in. on centers in }ii-in. thick body.) On the ceiling side, J^-i'n. gypsum wallboard nailed 12 in. on

centers, with all joints taped and finished. On the floor side, 2')^2- by 2S}i-in. compressed homogeneous

paper pulp building board {approximate density 26.1 Ib/ft^) nailed 8 in. on centers perpendicular to the

joists, %-in. hardboard glued to building board, a single layer of 15 lb felt building paper glued to hardboard,

and }i- by 9- by 9-in. vinyl asbestos tile glued to felt paper. Panel 721-B. Similar to panel 721-A, except the compressed paper pulp building board was covered with a foam rubber

carpet pad and nylon carpet. The carpet pad had an uncompressed thickness of Yi in., backed with a woven

jute fiber cloth; the rubber was perforated to approximately half its depth with holes y» in. in diameter and

spaced % in. on centers. The nylon carpet had Yi-in. woven backing and }i-in. looped pile spaced seven

loops per inch with a total carpet thickness of % in. Panel 722-A. Similar to panel 721-A, except the steel joists were spaced 24 in. on centers and compressed paper pulp building board was l^Yi2 in. thick. Panel 722-B. Similar to panel 721-B, except the steel joists were spaced 24 in. on centers and the building board was PY32 in. thick. Panel 723-A. Similar to panel 721-A, except the steel joists were replaced with 2- by lO-in. wooden joists. Panel 723-B. Similar to panel 721-B, except the steel joists were replaced with 2- by 10-in. wooden joists. Panel 724-A. Similar to panel 722-A, except the steel joists were replaced with 2- by 10-in. wooden joists. Panel 724-B. Similar to panel 722-B, except the steel joists were replaced with 2- by 10-in. wooden joists.

38
Table 3. Sound Transmission Loss and Impact Sound Pressure Levels (ISPL)—floor-ceiling constructions—Con. —

Airborne sound transmission loss (in dB) at frequencies (Hz) ISPL (in dB re: 0.0002 dyne/cm^) normalized to Ao=10 ni2 in octave frequency bands (Hz) Wt.

Panel No.

125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

75

1 150

150

1 300

300

1 600

600

1 1200

1200

1 2400

2400

1 4800 OA

(dB) INK

Ib/ft3

718 39 40 43 48 48 54 59 57 54 56 59 52 72 73 69 61 55 46 77 -2 9. 6

719 39 34 39 47 47 52 52 51 49 53 58 50 74 75 69 60 58 49 78 -3 9. 3

720 29 23 25 36 35 42 48 49 49 51 55 38 82 88 83 73 63 52 90 -15 9. 5

82 82 78 66 55 51 so i i

64 54 45 30 27 24 65 + 10

73 75 75 68 56 51 80 -5

59 47 39 26 20 12 59 + 15

723-A 24 17 33 29 34 41 39 44 41 41 49 ^35 83 82 80 66 53 48 87 -12 8o. 4^

723-B . . 27 20 33 33 38 44 44 50 49 54 60 38 65 56 47 32 26 14 66 + 9 9. 2

78 79 75 62 50 46 83 -8

65 52 43 28 22 11 65 + 9 'STL measured w/o hardboard, felt paper, and tile. 39
PANEL 725 PANEL 726 PANEL 727

Panel 725. 7-in. steel bar joists spaced 27 in. on centers. On the floor side, Ys-in. metal rib lath attached to top of joists, and 2-in.-thick poured concrete floor. On the ceiling side, resilient clips attached to joists held %-in. metal furring channels 16 in. on centers; %- by 16- by 48-in. plain gypsum lath held with wire clips and sheet metal end joint clips; Vw-in. sanded gypsum plaster and Yi^-in. white-coat finish. Panel 726. Similar to panel 725, except different resilient clips held the Yi-in. metal furring channels. Panel 727. Similar to panel 725, except the Y^-in. metal furring channels were wire-tied directly to the bottom of the joists. Panel 727-A. Similar to panel 727, except Ys-in.-thick vinyl asbestos tile was glued to concrete floor. Panel 727-B. Similar to panel 727, except }i-in.-thick foam rubber pad and Yi-in.-thick nylon loop carpet were placed on

concrete floor. {Same carpet and pad as with panel 721-B.)

Panel 727-C. Similar to panel 727, except Yz-in.-thick compressed homogeneous paper pulp building board was glued to concrete floor. Panel 727-D. Similar to panel 727, except yi-in.-thick cork tile was glued to concrete floor.

PANEL 728-A PANEL 728-B

Panel 728-A. 2- by 10-in. wooden floor joists spaced 16 in. on centers. Yi-in. flr plywood subfloor nailed to joists 8 in. on

centers; ]4-in. plywood underlayment nailed to subfloor with joints staggered to miss joints of the subfloor;

Ys- by 9- by 9-in. vinyl asbestos tile glued to underlayment. On the ceiling side, Y-in. gypsum wallboard

nailed 12 in. on centers with all joints and nailheads taped and flnished. Panel 728-B. Similar to panel 728-A, except a Yi-in.-thick foam rubber pad and Y»-in.-thick nylon loop carpet replaced

vinyl asbestos tile. (Same carpet and pad as used with panel 721-B.)

Panel 806.

Panel 807.

2-in. concrete slab, reinforced with 6- by 6-in. wire mesh, on Yi-in. metal lath; 12-in. open-web metal joists spaced 24 in. on centers; nailing channels wire-tied to joists; gypsum wallboard nailed to channels 6 in. on centers with fettering barbed nails; all joints taped and flnished.

3-in.-thick solid concrete wall poured in situ in test opening. All surface cavities were sealed with thin mortar

mix. 1 to 2 in. slump concrete mixture consisted of 611 lb cement, 1480 lb sand, 1603 lb gravel, and 38 gal water per cubic yard.

40
Iable 3. Sound Transmission Loss and Impact Sound Pressure Levels {ISPL) —flooh-ceiling constructions Con.

Airborne sound transmission loss (in dB) at frequencies (Hz) ISPL (In dB re: 0.0002 dyne/cm2) normalized to Ao=10 m2 in octave frequency bands (Hz) wt.

Ib/ft2 Panel No. 125 175 250 OOU 1 fW\ lUUU 1lOuU /uuu 3000 4000

75

1 150

150

300

300

600

600

1200

1200

2400

2400

4800 OA(dB) INR

43 41 41 44 45 49 53 48 53 58 60 48 67 68 71 74 78 69 81 -17

726 43 43 48 52 49 57 56 51 52 60 60 51 65 65 65 71 74 66 77 -13 39. 2 727 42 41 44 43 44 47 51 51 51 58 61 48 66 67 73 76 77 68 81 -16 38. 2 727-A 64 65 73 74 72 58 78 -10

727-B 39 41 43 40 44 48 52 53 52 61 65 46 48 39 35 27 20 9 49 + 26 39. 0

727-C 66 64 68 59 46 32 71 + 3

727-D 62 67 72 70 59 42 75 -2

72&-A — 30 19 38 32 36 38 43 47 48 46 49 37 87 85 86 82 70 64 92 -17 9. 0

69 57 52 40 34 19 69 + 5

40 38

39

40

37

43

39

46

45

48

50

51

51

54

54

53

59

51

61

54

62

49 34. 2

807 38 45 (ConCrete Wa11) 39. 4
PANEL 808

Panel 808. 4-'in.-thick reinforced concrete floor, isolated from support structure with fiberglass. , Concrete mix the same as

for panel 807; reinforcement consisted of 6- by 6-in. number 6 AWG reinforcing mesh placed at the centerline horizontal plane of the concrete slab. All surface cavities were sealed with a thin mortar mix. Panel 808-A. Panel 808 with a floor covering of Ys- by 9- by 9-in. vinyl tile with an approximate density of 1.4 Ib/ff^. Panel 808-B. Panel 808 with a floor covering of ]{- by 9- by 9-in. laminated oak wood blocks with an approximate density of

1.8 lb/ft K Panel 808-C. Panel 808-B with carpeting and foam rubber pad. The carpeting was of %-in. wool loop pile with a }i-in. woven jute backing and had an approximate density of 0.49 Ib/ft^. The pad was }i-in. thick and had an

approximate density of 0.53 Ib/ff^. Panel 808—D. Panel 808 with same carpeting and pad as with panel 808—C. Panel 809. Similar to panel 808-B, except different trowel was used which spread approximately 1.6 times more mastic

per unit area. Panel 809-A. Panel 809 with an underlayment of yi-in.-thick polystyrene closed-cell foam, with an approximate density

of 2 Ib/ft^, sandwiched between two layers of kraft liner board facings, each having an approximate weight of 0.042 IblfP. Panel 809-B. Similar to panel 809-A, except the polystyrene closed-cell foam was in. thick with an approximate density of 4.5 lblft\ Panel 809-C. Similar to panel 809-A, except the underlayment was Yt-in.-thick rigid polyurethane, approximate density

2.5 Ib/ft^, between liner board facings.

Panel 809-D. Panel 809 with an underlayment of yi-in.-thick fiber board having a density of approximately 21 Ib/ft^. Panel 809-E. Panel 809 with an underlayment of }i-in.-thick semi-rigid polyurethane foam having an approximate density

of 2.2 IblftK Panel 809-F. Panel 809 with an underlayment of Yi-in.-thick milling grade cork of mesh 8-I4 to 1 in. having a density of approximately 24 Ib/ft^. Panel 809-G. Similar to panel 809-F, except the cork was Y» in. thick. Panel 809-H. Panel 809 with an underlayment of Y»-in.-thick molded corrugated pulp material of sulfate fibers, having

approximately 33 corrugations per linear foot and an area density of approximately 0.05 Ib/ft^.

42
Table 3. Sound Transmission Loss and Impact Sound Pressure Levels (ISPL) —flook-cbilinq constructions Con.

Panel No.

Airborne sound transmission loss (In dB) at frequencies (Hz) ISPL (In dB re: 0.0002 dyne/cm2) normaUzed to Ao=10 m2 In octave frequency bands (Hz) wt.

lb/ft» 125 175 250 350 500 700 1000 1500 2000 3000 4000 STC

75

1 150

150

1 300

300

1 600

600

1 1200

1200

1 2400

2400

1 4800 OA

(dB) INR

808 48 43 42 38 45 46 56 51 57 65 66 44 63

61

61

44

49

65

65

66

64

6562

64

65

65

69

6766

33

42

70

68

70

70

67

66

87

67

67

79

7774

34

40

77

76

76

76

75

71

76

75

76

81

80

72

21

29

76

66

74

72

72

53

75

68

76

82

79

63

12

23

68

53

54

58

54

36

57

49

58

80

7650

"54

39

48

48

44

22

45

37

46

87

84

77

45

50

80

77

79

78

78

73

79

77

80

•'-26

b_22

b_6

"+33

" + 29 "-9

b-2

b_7

"-5

"-5

" + 1 "-7

b_2

b-8

53. 2

808-A

808- D

809

809-C

809-D

809-E

809-F

809-G

809-H

b INR based upon >^-octave frequency band data.

43
Indices

As a convenience, several indices of the combined results of both publications are given here.

All entries in bold-faced type refer to information

contained in this monograph, and conversely.

light-faced type entries refer to information in

the BMS Report 144 (1955). All STC values

given for the results reported in the BMS Report

144 are based upon nine test frequencies.

Index I. Numerical Index of Test Panels.

Panel No. STC Pag

13 6-54 52 136-B 61 52

137 51 52 137-A 53 52 137-B 56 52

144 46 14 145 45 14 146 33 12 147-A 41 12 147-B 49 12

148 40 36

149 48 36

150 50 38

151 50 38

152 50 38

153 47 38

154 38 26

155 44 14 156 53 62

157 55 62

158 55 62

159 34 50

160-56 50 160-B 55 50 160-C 55 50 160-D 52 50 160-E 51 50 160-F 50 50 160-G 50 50 160-H 47 50

160-1 47 50

161 39 18 162 43 32

163 31 32

164 45 32

ICC 1D0_ 37 32 iDD-A OA39 A O 48

loo-±$ 39 A O 48

167 51 38

168 57 38

170 35 26 171-A 37 26 171-B 34 26 171-C 33 26

172 39 26 173-A 38 14 173-B 35 14 173-C 12 14 174 36 32

175 51 34

176 49 40

177 38 40

178 47 40 179-

33 28

179-B 36 28

Panel No.

179-C. 179-D

180-A. 180-B.

180-C. 180-D

180-E.

180-F_ 181- -- 182_..

201- -- 202- -. 203. -- 204. -- 205...

206...

207.-.

208--.

209...

210-.-

211..-

212...

213...

214.--

215- -- 216- .- 217...

218...

219.--

220...

221...

222..-

223.--

224---

225...

226...

227. -- 228. -- 229---

232---

233...

234. -. 235. -- 236- -- 237- -. 238- -. 239- .. 240...

241...

242.,.

243. -- 244. -- 245. -- 247-..

250.--

251---

STC

3536

37

5150

52

46

49

27

27

34

32

3135

42

32

32

24

40

27

25

43

5328

5036

4038

415349

57

5638

40

4040

41

4134

4337

42

46

*43

*48

44

36

4144

44

4443

48

25

39

Page

28

28

56

56

56

56

56

56

1010

3236

36

3630

3030

30

30

3028

28

30

2828

28

28

2830

30

5048

48

34

34

36

36

32

48

12

1234

34

36

24

24

2424

2426

2626

26

26

2426

Panel No.

«301

302^ 303.

304.

305.

306. 307.

308.

309.

310.

311. 312

313

314.

315

316

317

318

319

401. 402.

403.

404. 405.

406.

407.

408.

409.

410.

411.

412.

413. 414.

415.

416.

417. 418.

419.

420.

421.

422.

423.

424.

425.

426- 427.

428.

429.

430.

STC

3838

38

40

4239

5648

37

48

2145

*46

*52

*45

*47

*53 *52

*49

4243

41

4143

41

4144

4146

42

4746

4742

4544

4948

52

5150

53

5153

4346

4354

45

Page

18

16

16

18

18

1220

14

18

18

14

1428

28

28

30

282830

38

38

38

38

38

38

38

38

38

38

3838

40

40

40

42

42

42

42

42

42

42

4244

34

4646

22

50

26

Panel No.

431.

433.

434- 435-

436-

437- 438-

439- 440-

441-

442-

443. 444-

445- 446-

447- 448-

449-

450.

501-

502.

503. 504.

505-

506- 507-

508- 509-

510.

511.

512. 513. 514.

515.

516.

517. 518.

519-

520.

521.

522. 523-

524.

525-

526.

527-

528-

STC

45

47

45

4247

42

*38

4448

53

4446

4152

36

41

36

38

39

2935

34

34

35

37

41

4149

34

38

3938

4238

3630

36

3142

32

38

37

38

31

3138

32

*STC based upon nine test frequencies.

•= All entries in light-faced type refer to BMS Report 144

(1955) with STC values based upon nine test frequencies.

44
Index I. Numerical Index of Test Panels—Continued

Panel No.

= 601. 602.

603- 604.

605.

606. 607.

608.

609.

610.

611. 612.

613. 614-

615.

616-

617-

618.

619. 620.

621-

622.

623-

624-

625-

626-

627- 628-

629.

630.

STC Pag

27 10 31 12 37 12 37 12 30 10

19 10 38 10 *43 16 *47 16 *48 18 *62 18 35 10

41 10 *59 18 *45 18 *30 6 *28 6 *33 6 *33 6 *30 6 *35 6 *44 6 *38 6 *38 8

*41 8 *32 8 *23 18

*21 20

*25 20

35 8

Panel No. STC

631 - _ 632- . 633- - 634.-

635- -

636- - 637 _. 638.. 639..

640.-

641 _. 642_-

643_.

644__

645..

646.

_

646-A

647..

648--

649_-

650- _ 651- . 652- - 653- . 654...

655..

656-

.

657..

658..

rage

ou^0 QO ou^0 Qo

18 8 20 8 24 10

26 10 32 10 30 10 So 10 34 10

42 10 46 10 49 12 oo

34 12

25 14 21 14 32 20

33 20

41 22

37 14 29 14 36 16- 47 16

36 22

34 22 26 22

32 22

Panel O i O

TTVTT) IJN K Page Panel STC INR Page

No. No.

c 701 54

< _ A 147 54 727 48 — 16 40

/ Uo 4o 54 727-A — 10 40

i U'± 54 727-B 46 +26 40

/ uo K70/ 58 7Z7-L + 3 40 727-D.. — 2 40

/ UD . 04 58 707 700 A 7Z8-A 37 — 17 40

/Uo A r\ 40 52 728-B +5 40

/ U9 0/ 58 710 52 58

"801 42 60

•71 1 36 802 48 60

/ IZ fie OO 47 60 713 36 36 804... . 48 60 714 37 36 805___ . 49 60

/ lo 51 36 806 . 49 40

71 C < Id oeOO OD 807 45 40

71 7 A C 45 — 50£OD QAQ OOO _ 44 — 26 42

71 fi /lo . 5Z — 2

oooo

71 Q /IS 5U o o o OS OAO A sOs-A — 22 42

7 OA /ZU 38 — 15 38 808-B.-_ — 6 42 808-C + 33 42

701 A

/ Zl—A — 11 ooOS OAo + 29 42

701 D 7Z1—B + 10 38 809 — 9 42 700 A /ZZ—A — 5

o o oo OAA A — 2A O 4^ 700 T> + 15 o o OS

700 A 723—A — 12 38 OAA I > oOa-tJ — 7A O 4Z

OAA t ^ — 5A O 42

723-B... 38 + 9 38 809-D-_ -5 42 724-A... — 8 38 809-E_-_ + 1 42

724-B... + 9 38 809-F__- -7 42 725 48 -17 40 809-G-- -2 42 726 51 -13 40 809-H-- -8 42

*STC based upon nine test frequencies.

"= All entries in light^faced type refer to BMS Report 144

(1955) with STC values based upon nine test frequencies.

Index IIA. Sound Transmission Class Index of Test Panels

A. DOOBS—Type code: a. solid core

b. hollow core

c. special construction

d. metal

e. folding

f. w/drop closure

STC

50

49

47. 46

*44.

42. "41.

*41. *38.

*38.

3736

35. *353535

34

34 *33 *33

Panel No.

644 643

654 642

622

641 613

625 623

624

651 653

612

621 630

639

640

645

618

619

d, c, f

d, c d, c

c. f

c. f

c, f c,f

c, f

c, f

c, f

c, f d, c, f

c, f c, f

c, f

c

c, f

d, c

c, f

c, f

12

12

16

10

6

10

108

6

8

1416

10

68

10

10

12

66

STC Panel Type Page

No.

*32 626 c, f 8

32 637 c, f 10

*30 616 a,f 6 *30 620 c, f 6 30 631 c, f 8 30 632 a, f 8

30 638 c, f 10

29 652 c, f 14 *28 617 a, f 6 27 181 a, f 10 27 182 a, f 10 26 636 c 10

25 646 e 14 24 635 c 10

21 646-A e 14 20 634 b 8

18 633 b 8

*STC based upon nine test frequencies.

° All entries in light-faced type refer to BMS Report 144 (1965) with STC

values based upon nine test frequencies. 45
Index IIB. Sound Transmission Class Index of Test Index IIB. Sound Transmission Class Index of Test Panels Panels—Continued

B. WALLS—Type code:

a. wood stud

b. metal stud

c. masonry

d. concrete

e. staggered stud

f. lath & plaster

g. gypsum wallboard

h. w/resilient element

i. movable partition

j. wooden panel

B. WALLS—Type code:

a. wood stud

b. metal stud

c. masonry

d. concrete

e. staggered stud

f. lath & plaster

g. gypsum wallboard

h. w/resilient element

i. movable partition

j. wooden panel

STC

<=57

57.

56.

56.

56.

55.

55.

54.

53.

53. *53

53. 53. 53

52. *52.

*52.

52. 52.

51.

51.

51.

51.

51.

50.

50.

50.

50.

50.

50.

50.

49.

49. *49.

49.

49.

48. *48.

48.

48.

48.

48. 48

47.

47.

47.

47. *47.

47.

47.

47.

47.

Panel No.

168 222

160-

223

307

160-B

160-C

429

213

220

317

423

425

441 160-D

314

318

420 445

160-E

167 175

421 424

150

151 152 160-F

160-G

215

422

176

221 319

418

509

149 238

247

308

310

419

440

153 160-H

160-1

178 316

412 414

433

436

a, f, h

b, f b, f b, f c

b, f b, f b, f, h

a, f a, f c, f, h

a, f, h

a, f, h

b, f, h

b, f c, f, h

c, f, h

a, f, h

a, g, h

b, f a, f, h

a, e, f a, f, h

b, f

a, f, h

a, f, h

a, f, h

b, f b, f a, e, g, j a, f, h

a, f, h

b, f c, f, h

a, f, h

f

a, f a, e, f b, g

c

c, f, h

a, f, h

b, f

a, f b, f b, f a, f

c, f, h

a, f, h

a, f, h

b, f b, f, h

Page

38

48

5048

20

50

50

50

303028

4234

30

502828

4232

5038

34

42

44

38

38

38

50

5028

42

40

5030

4224

36

24

26

141842

30

38

50

5040

30

38

40

44

46

Panel Type Page

No.

-=46 144 c 14 46 236 a, e, g, h 36

*46 313 c, f, h 28

46 410 a, f, h 38

46 413 a, f, h 40 46 427 b, f 46

AC A AO

a, I, n 32

45 145 c 14 45 164 a, f 32

45 312 c 14 *45 315 c, f, h 28

45 416 a, f 42

45 430 f 26

45 431 f 26

45 434 b, f 44

o07 d 40

44 155 c 14 44 239 a, f 24

44 242 a, e, g 26

44 243 a, e, g 26

44 244 a, e, g 26

44 408 a, f, h 38 44 417 a, f 42

AA A OO a, I, nonoO 44 442 a, f, h 30 43 162 a, f 32

43 212 a, g, j 28 *43 237 a, e, f 24

43 245 a, e, f 26

43 402 a, f, h 38

43 405 a, f, h 38

43 426 b, f 46

43 428 g, h 22

42 205 a, f 30 42 235 a, e, g 34

42 305 c 18 42 401 a, f, h 38

42 411 a f, h 38

42 415 a, f, h 40

42 435 b, e, f 46

42 437 b, f 44 42 514 f 24

42 520 f 22

41 219 a, j 30

41 228 a, f 32

41 229 b, f 48

41-- - 241 a, g 24

41 403 a, f, h 38

41 404 a, f, h 38

41 406 a, f, h 38

41 407 a, f, h 38

41 409 a, f, h 38

41 444 b, f, h 32

41 447 b, g 32

41 507 f 24

41 508 f 24

41 650 i. b 22 *STC based upon nine test frequencies.

-= All entries in light-faced type refer to EMS Report 144

(1955) with STC values based upon nine test frequencies.

46
Sound Transmission Class Index of Test Panels—Continued

Index IIB. Sound Transmission Class Index of Test Panels—Contiiiued

B. WALLS—Type code;

a. wood stud

b. metal stud

c. masonry

d. concrete

e. staggered stud

f. lath & plaster

g. gypsum wallboard

h. w/resilient element

1. movable partition

j. wooden panel

B. WALLS—Type code:

a. wood stud

b. metal stud

c. masonry

d. concrete

e. staggered stud

f. lath & plaster

g. gypsum wallboard

h. w/resilient element

i. movable partition

j. wooden panel

Panel No.

148 209

217

225 226

227

304

161 166-A

166-B

172

251 306 450

512

154 173-

A

177 218

224

301 302

303 438

449

511 513 515

522 524

527

165 171-A

234

309

506

523

174 179-B

179-D

216

240 446

448

516 518

655

a, f a, g

a, j a, g

a, f a, f c

cb, f b, f b, f a, f

c

a, g, h

f

b, f c

a, f a, g, j a, g

c

c

c

b, f b, f, h

f

f

fg

b, f

f

a, f b, f a, g

c

fb, f

a, f a, j a, j a, g, j a, g

b, f, h

b, f

fb, f

i, b, g

Page

3630

28

34

36

36

18

184848

2626

1234

22

26

144028

34

18

16

16

28

34

2224

24

2226

20

32

26

34

1822

26

32

28

28

28

2432

34

22

2622

STC Panel No. Type Page

=35 170 b, f 26 35 173-B c 14 35 179-C a, j 28

Q K OO zu4 a, I OO

35 502 b, f 26

35 505 f 24

61 1 CO b, I OU 34 171-B b, f 26

34 201 a, f 32 34 503 f 20 34 504 f 22 34 510 f 22 34 656 i, b, g 22

33 171-C b,f 26

33 179-

A

a, j 28

33 649 i 20

32 202 a, f 36 Mo a, i oK) 32 207 a, j 30 32 521 f 22 32 528 g 22 32 647 i 20

Q 1 loc> a, I 31 203 a, f 36

31 519 b, f 26

31 525 b, f 26

31 526 f 20

30 517 f 22

29 501 b, f 26 28 214 a, e, j 28

27 210 a, j i. b

30

26 657 22

25 211 a, j 28

24 208 a, g 30

24 648 i 20

21 311 c 14 12 173-C c 14

*STC based upon nine test frequencies.

-= All entries in light-faced type refer to BMS Report 144

(1955) with STC values based upon nine test frequencies.

47
Index IIC. Sound Transmission Class Index of Test Panels

C. FLOOB-CEILING CONSTRUCTIONS—Type code:

a. wood joist d. lath & plaster

b. metal joist e. gypsum board

c concrete f- w/resilient elements

STC Panel No. Type INK Page

c 61 136-B b, c, d 52

57 705 a, d, f 58

56 137-B b, c, d 52

55 157 c, d, f 62

55 158 c, d, f 62

54 136-

b, c, d 52 54 706 a, d 58

53 137-A b, c, d 52

53 156 c, d, f 62

52 180-D a, d, f 56

52 709 a, d, f 58

52 710 a, d, f 58

52 718 a, e, f — 2 38

51 137 b, c, d 52

51 180-B a, d, f 56

51- 715 a, e, f 36

51 726 b, c, d, f — 13 40

50 180-C a, d, f 56 50 719 a, e, f — 3 38

49 180-F a, d, f 56

49 805 c 60

49.- - 806 b, c, e 40

48 725 b, c, d, f — 17 40

48 727 b, c, d — 16 40

48 802 c, d 60

48 804 c 60

47 702 a, d 54 47 803 c, d 60

46 180-E a, d, f 56

46 704 a, d 54

46 727-B b, c, d + 26 40

45. -- 717 a, e, f -5 36

44 808 c —26 42

43 701 a, d 54

43 703 a d 54

42 707 a 52 42 801 c, d 60

40 - - 708 a, d 52

*39 712 a, e, f 36

38 720 a* e — 15 38

38 723-B a, e + 9 38

37 180-A a, d 56

37 714 a. d 36

37 728-A a, e -17 40

*36 711 a, e, f 36

36 713 a, e 36

36 716 a, e 36

35 723-A a, e -12 38

*STC based upon nine test frequencies.

« All entries In light-faced type refer to BMS Report 144 (1955) with STC

values based upon nine test frequencies.

Index IID. Sound Transmission Class Index of Test Panels

D. MISCELLANEOUS—Type code:

a. plastic panels c. ship structures

b. aircraft fuselage d. single layer of material

Panel No. iype rage

611 c IS 614 c

1 QIB 147-B 1 O *48 610 c 18 *47 609 c 16

615 c

1 fi 'tO- 233

608 c ID

41 147-

12 38 607 10

603 1 9

ot 604 1 9 34 232 d 12 33 146 12

t>5o a

Oi 602 1xZ9 30 605 d 10 27 601 10 25 250 a 24

*25 629 b 20

*23 627 b 18

*21 628 b 20

19 606 d 10

*STC based upon nine test frequencies.

0 All entries In light-faced type refer to BMS Report 144 (1955) with STC

values based upon nine test frequencies.

Appendix : Conversion of Units to

International System Units

The following table gives the conversion factors

necessary to convert the units of the various

quantities given in this publication in units other

than the International System to the units of that

system which were adopted by the Eleventh

General Conference on Weights and Measures,

Paris, October 11-20, 1960.

Area: 1 sq foot (ft 2) =0.092903 sq meter (m^)

Area density: 1 pound per sq foot (lb/ft ^) =4.88243

kilogram per sq meter (kg/m^)

Frequency: 1 cycle per second (c/s) = l hertz (Hz)

Length: 1 inch (in.) =0.0254 meter (m)

1 foot (ft) =0.3048 meter (m)

Pressure: 1 dyne per sq centimeter (dyne/cm^) =

0.1 newton per sq meter (N/m^)

Volume: 1 cubic foot (ft^) =0.0283168 cubic meter

(m=')

48
Index III. Impact Noise Rating Index of Floor-Ceiling Constructions Type code:

a. wood joist e. gypsum board ceiling b. metal joist f. w'resilient ceiling element

c. concrete g. w/resilient floor element

d. lath & plaster ceiling h. w/carpetlng

iJN K

-NT Fanel JNo. iype Fage

+ 33 808-C c, h 42

+ 29 808-D c, h 42

H-2d 0, c, a, n

A A + 15 '700 I> D, e, n

9QOO +1 1 A10 / Zl—D K #v k D, e, n OO + 9 723-B a, e, h 38 38 + 9 724-B a, e, h 38 + 5 a, e, h /in + 3 D, c, a

y4 A + 1 GAO 1? c. g -2 718 a, e, f, g 52 38 -2 727-D b, c, d 40 — o4- oU5*—

A

c. g 194^ — o oU5»—vjr c, g 49 — oo _ 719 a, e, f, g

CIA oo -5 717 a, e, f 45 36 -5 722-A b, e 38 — tro_ c, g 42 — ero_ OVv—Lf c, g 42 — D OAQ U oO?V-i> c -7 809-B c, g 42 -7 809-F c, g 42 — oS 7iS4—

A

a, e — oO

Q AO TT c, g 42 — 9 - . o0» c 42 -10 727-A b, c, d 40 — 11 721-A b, e 38 -12 723-A a, e 35 38 -13 726 b, c, d, f 51 40

-15 720 a, e, g 38 38 -16 727 b, c, d 48 40

-17 725 b, c, d, f 48 40

-17 728-A a, e 37 40

-22 808-A c 42 -26 808 c 44 42

49

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