December 2001

NASA/CR-2001-211255

Binaural Simulation Experiments in the

NASA Langley Structural Acoustics Loads

and Transmission Facility

Ferdinand W. Grosveld

Lockheed Martin Engineering and Sciences, Hampton, Virginia
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December 2001

NASA/CR-2001-211255

Binaural Simulation Experiments in the

NASA Langley Structural Acoustics Loads

and Transmission Facility

Ferdinand W. Grosveld

Lockheed Martin Engineering and Sciences, Hampton, Virginia
Available from:

NASA Center for AeroSpace Information (CASI) National Technical Information Service (NTIS)

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Hanover, MD 21076-1320 Springfield, VA 22161-2171

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1

Introduction

Binaural simulation is the representation of sound as heard through the left and right ears of a listener

and includes interaural signal time and intensity differences and the acoustic scattering about the

head, pinnae and torso. The temporal differences occur naturally when a sound reaches the ears from

one specific direction and may be measured by placing small microphones in the ears of a replica of a

human head and torso. The relation between the two signals is preserved throughout the data

acquisition and analysis process. The ambisonic B-format representation of sounds, including

direction, consists of four signals. These signals represent the zero and first order spherical

harmonics in three dimensions. The zero order harmonic (denoted W) is a sphere with an amplitude

that is independent of direction. The three first order harmonics consist of dipoles in three mutually

orthogonal directions. These are front-back (X), left-right (Y) and up-down (Z). The basic B-format

representation of a reference and three vectors is mathematically simple to produce and is easily

transcoded into other formats. Binaural simulation studies of sound radiating from structures are

being pursued by the Virginia Polytechnic Institute and State University and NASA Langley

Research Center under NASA cooperative agreement NCC-1-01029, “Development of an Efficient

Binaural Simulation for the Analysis of Structural Acoustic Data.” The purpose of the current work

is to report on a matrix of binaural simulation measurements in a controlled acoustic environment to

assist in the validation of these studies.

Test Facility

The measurements were conducted in the NASA Langley Research Center Structural Acoustic

Loads and Transmission (SALT) facility. The arrangement of the anechoic chamber, the transmission

loss (TL) window and the reverberation chamber is depicted in Figure 1. The anechoic chamber

measures 4.57-m high, 7.65-m wide and 9.63-m long, measured from wedge tip to wedge tip for a

volume of 337 m3

. More than 4850 open-cell, polyether-polyurethane acoustic wedges cover the

walls, the ceiling and the floor in the anechoic chamber. The movable partition (Figure 1) in front of

the TL window was removed to accommodate the binaural simulation measurements. A 4.9-mm

thick aluminum test panel, with an exposed area of 1.415- by 1.415-m, was installed in the TL

window. Four 12.7-mm thick steel bars along the four edges of the panel provided an even

distribution of the clamping forces applied to 56 bolts evenly spaced along the perimeter. The 278-m3

reverberation chamber is structurally isolated from the rest of the building and measures

approximately 4.5 m by 6.5 m by 9.5 m. A cross-sectional view of the anechoic chamber showing the

transmission loss window is presented in Figure 2. More detailed information on the SALT facility is

provided in Reference 1. A location and positioning system was developed and implemented in the

anechoic chamber of the SALT to accurately determine the coordinates of points in threedimensional space. The method uses four reflective ball bearings, mounted onto the frame of the

transmission loss window, as fixed reference points. The four reference points are in a plane parallel

to the window frame. The system was extended to include reference points on the vertical side rail of

the existing traverse system and the frame of the SALT facility entrance door. A trilateration

procedure was formulated to calculate the coordinates for any specified location from the nonredundant distances to three calibrated reference points. A laser distance meter and a self-leveling

laser vector alignment instrument were used for the distance measurements. Accuracy of the

calculated coordinates, based on the measured distances, was within four millimeters.
2

Binaural Simulation Experiments

Measurements were made of the excitation, dynamic response and radiated sound field from the

aluminum panel mounted in the transmission loss window of the SALT facility. Three basic sets of

measurements were acquired in the anechoic room with and without the presence of a hard wall

reflective surface:

1. Transfer functions were measured between a shaker source at two different panel locations and

the vibrational response distributed over the panel surface using a scanning laser vibrometer.

2. Transfer functions, auto spectra and coherences were acquired between a shaker source at two

different panel locations and the radiated sound at a number of freestanding microphone,

B-format microphone and mannequin locations and for several positions and orientations of the

mannequin.

3. The excitation time histories, panel response time histories at five locations, and the radiated

sound time histories for a reference, a freestanding microphone, a B-format and two mannequin

microphones were measured for broadband random, and transient input sources.

The first set of tests included only structural measurements. During the second and third sets of

measurements acoustic as well as structural data was acquired and processed. Instrumentation was

set up, configured and calibrated. The instrumentation included a personal computer (PC) based

sound source generator, a shaker and signal amplifier, a force transducer, four panel-mounted

accelerometers, one reference accelerometer on the mounting frame, two microphones with signal

conditioners and power supplies, a band-pass filter, the Polytec laser vibrometer, the KEMAR

(Knowles Electronics Manikin for Acoustic Research) binaural recording mannequin with the two

microphones and signal conditioners, a B-format microphone with four output channels and the

Structural Dynamics Research Corporation (SDRC) I-DEAS test data analysis software using the

Hewlett Packard (HP) VXI ADC data acquisition system. The structural and acoustic data

acquisition and analysis equipment is listed in Table 1. The components of the Polytec scanning

vibrometer data acquisition and display system are summarized in Table 2. The components of the

SDRC/HP/National Instruments (NI) data acquisition and analysis system are listed in Table 3.

Measurements using the freestanding and the B-format microphones were made at the same

positions as those made using the mannequin to obtain directly comparable data. This makes it

possible to compare monaural recordings from the freestanding microphone with binaural recordings

from the mannequin and B-format microphones.

Structural transfer functions

The aluminum test panel mounted in the TL window as viewed from the reverberation chamber is

shown in Figure 3. The panel was instrumented with a shaker and four accelerometers. The shaker

included a force gauge and an acceleration transducer. One of the accelerometers was mounted on

the frame to detect possible flanking. The set up is shown in Figure 4. The coordinates of the

measurement locations on the panel are listed in Table 4. The positive X-axis points to the left, when

facing the panel from the reverberation chamber, while the Y-axis points up. One shaker location was

chosen in the center of the panel to excite the lower-order odd modes of the panel (panel location

ploc.1). The shaker location closer to one of the corner boundaries (panel location ploc.2) was

selected to excite as many modes as possible. A close up of the mini shaker attached to the panel at
3

location ploc.2 is presented in Figure 5. Figure 6 shows a close-up view of the three panel-mounted

accelerometers. The Cartesian panel coordinate system is shown in Figure 7 as viewed from the

anechoic chamber. The Z-axis is perpendicular to the panel and points into the anechoic chamber.

The Polytec scanning laser vibrometer (Figure 8) was positioned in the chamber at a stand-off

distance 3089 mm from the panel center. This distance was optimized for the vibrometer by choosing

n=15 in the formula 14 + n*205. The stand-off distance formula was supplied by the manufacturer.

The vibrometer measured the two-dimensional distribution of the vibrational velocities over the panel

surface. The highly reflective surface of the panel was treated with a very thin white film to diminish

scattering of the laser beam and increase the accuracy of the laser vibrometer measurements. The

location of the vibrometer in the anechoic chamber is depicted in Figure 9. A 23 by 23 mesh was

generated in the Polytec software and superimposed on the Polytec video image of the panel as

shown in Figure 10. The transfer functions between the shaker point force input and the velocity at

529 points on the panel grid were measured with the laser vibrometer for the two shaker locations

(ploc.1 and ploc.2) and pseudo-random noise input to the shaker. Related files were designated with

the names ‘Binpseudo2loc1Scan’ and ‘Binpseudo2loc2Scan’. The measurements were repeated for

chirp noise input to the shaker when attached to the center (location ploc.1) of the panel. Files

associated with these measurements were named ‘Binchirp2loc1Scan’. The velocity was measured by

the vibrometer with a sensitivity of 25 mm/s /V and a maximum range of 10V. The sensitivity factor

of the reference acceleration was 1 m/s2 /V with a maximum of 1V. Angle correction was

automatically applied by the Polytec system. Sample bitmap graphic files of the panel velocity grid,

with the extension ‘.bmp’, were archived on compact disk number 1 (Table 5). The binary data files,

which were acquired in Polytec software format with extensions ‘.svd’, were stored on compact disk

2 and are tabulated in Table 6. Other, non-essential, files were written to compact disks 3 and 4 but

are not listed here. The binary Polytec data files were converted to universal file format and archived

on compact disks 5-7 (Tables 7-9).

Acoustic and structural response experiments

Anechoic environment: The panel Cartesian coordinate system shown in Figure 7 was used to

identify microphone locations in the anechoic chamber, including the reference microphone (ref.mic),

the freestanding microphone (mic-1), the two microphones in the ears of the mannequin (manikin-left

and manikin-right), and the four transducers in the B-format (W, X, Y and Z) microphone. The

coordinates of the measurement locations (loc.1 through loc.7) are summarized in Table 10. Figure

11 shows the Knowles Electronics Manikin for Acoustic Research (KEMAR). The support structure

of the acoustic mannequin depicted in Figure 12 was designed to allow a range of rotational and

angular attitudes. The local coordinate system of the mannequin and the positive rotation directions

are indicated in Figure 12. The rotation about the Y-axis (phi.1) was measured with a torso-mounted

protractor. The angles of rotation about the X-axis (phi.2) and the Z-axis (phi.3) were measured with

a laser inclinometer. Accuracy of the measured angles was within ± 0.1 degree. The test matrix for

the binaural simulation measurements is presented in Table 11. The schedule included 43 test runs for

several locations of the measuring microphones, various attitudes of the mannequin, two locations of

the shaker excitation and three different shaker inputs including pulse, broadband random, and

pseudo-random. Measurements were taken for the 0-4000 Hz frequency band. Time histories were

acquired for pulse and broadband random input to the shaker (pulse and random files in Table 11).

The broadband random input was low-pass filtered at 2000 Hz. Transfer functions, auto spectra and
4

coherence functions were acquired for the pseudo-random excitation (transfer files in Table11). The

pseudo-random excitation was the same input from the arbitrary function generator as used for the

structural transfer function measurements with the Polytec laser vibrometer system. Special

measurement conditions for the binaural tests are listed in Table 12. An additional gain of 20 dB was

applied to the mannequin microphone output signals for test number 35 to increase the measured

dynamic response. The pulse input signal was changed from 4 V to 10 V for tests 39-43 and the

pseudo random time input signals were changed from 4 V to 10 V for tests 40-43 to increase the

output response levels. An additional gain of 20 dB was applied to the Y and Z channels of the Bformat microphone for tests 40 and 43. None of these additional gains were included in the

sensitivity factors of the IDEAS software and must be applied as corrections to the stored data. The

file names in Table 11 were chosen to reflect the test type, test number, microphone identification,

mannequin attitude if applicable, microphone location, and the shaker location on the panel. The

name r8f45-n45-0l1f2 in Table 11, for instance, indicates files with time histories for broadband

random noise excitation (r), test number 8 (8), rotation of the mannequin 45 degrees about Y-axis

and –45 degrees about the X-axis (f45-n45-0), placement of the mannequin at location loc.1 (l1) in

the anechoic chamber and mounting of the shaker at location ploc.2 (f2) on the panel. Each file

stores the signals from as many as fourteen channels (when all are active) including the shaker force

transducer channel, five accelerometer response channels and eight channels for the reference

microphone, the main microphone, the mannequin (two channels) and the B-format microphone

(four channels). The channel calibration settings are presented in Table 13. The microphones were

calibrated before each data run and were all within ± 0.1 dB of the initial calibration values. The

pressure reference microphone ref.mic was replaced by another pressure reference microphone after

test number 35 and recalibrated. The related sensitivity factor was changed in IDEAS. A pressure

microphone was used for the freestanding microphone, mic-1, in the first 35 tests to provide

additional reference data. This pressure microphone was replaced by a free-field microphone for tests

36-43 to accommodate comparison with the mannequin microphones and the B-format microphone

data at the same locations. The free-field microphone was calibrated and the sensitivity factor was

adjusted in IDEAS (Table 13). The initial data acquisition sampling, trigger, window, averaging,

filter and measurement conditions are tabulated in Table 14. Figure 13 shows the mannequin at

location loc.1, parallel to the panel with its positive local Z-axis pointing to the panel center

corresponding to the first test configuration in Table 11. The attitude of the mannequin for a

combination of a 45-degree rotation about the Y-axis and a rotation of minus 45 degrees about the

X-axis is depicted in Figure 14 and corresponds to test number 8 in Table 11.

Reflective panel installed: The tests were repeated after a 1473 mm by 1473 mm reflective panel

was installed along the left vertical edge of the test panel and perpendicular to the test panel surface.

The binaural simulation test matrix for the reflective panel is presented in Table 15. Figures 15, 16

and 17 show three attitudes of the mannequin at location loc.1 with the reflective panel installed. The

mannequin was positioned parallel with the panel in Figure 15 (Test 1a in Table 15), rotated 150

degrees about the Y-axis in Figure 16 (Test 25a in Table 15), and rotated 45 degrees about the

Z-axis in Figure 17 (Test 7a in Table 15). The actual rotation in Figure 17 was about an axis located

848 mm below and parallel with the Z-axis, which not only resulted in a rotation angle about the

Z-axis but also in an X and Y translation. The B-format microphone at measurement location loc.1 is

shown in Figure 18. The mannequin at measurement location loc.2 is depicted in Figure 19. The

mannequin was rotated minus 32.3 degrees about the Y-axis pointing directly with its nose to the
5

center of the test panel. The mannequin was then rotated 30 degrees about the X-axis to create test

configuration 34a. Figure 20 shows the B-format microphone at measurement location loc.1 with the

mannequin in the foreground at location loc.2. The distance from location loc.3 to the test panel was

too long relative to the dimensions of the reflective panel. The long distance prevented sound

reflections from reaching the microphones at location loc.3 and therefore no measurements were

conducted at that location. Four additional measurements were performed with the B-format

microphone at location loc.1. The B-format microphone was positioned with its manufacturer logo

facing the test panel and was rotated four times 90 degrees in clockwise direction (b.psi in Table 15)

to investigate the effect of its orientation on the directionality of the output signals.

Data Storage: The I-DEAS program could not retrieve the records in the files p5f0-30-0l1f2.ati,

p6f0-n30-0l1f2.ati, p39bml21f2input10v.ati, r5f0-30-0l1f2.ati and r41bml43f2input10v.ati. These

tests were set up again consistent with the original configuration and the data acquisition was

repeated. The tests requiring the B-format microphone were not repeated, as the B-format

microphone was no longer available. All the binary files were converted to the universal file format

and were archived, along with the original files, onto thirteen compact disks. All files on each disk

were compressed into one ZIP format file. The compressed ZIP files are available for download at

the Universal Resource Locator (URL) http://stab.larc.nasa.gov/PubData. The compact disk

numbers, the storage space on each disk required for the original files, the compressed file sizes and

the file names are listed in Tables 5-9 and 16-21. Non-pertinent files were omitted from the database.

Summary

A location and positioning system was developed and implemented in the anechoic chamber of the

SALT facility to accurately determine the coordinates of points in three-dimensional space. Transfer

functions were measured between a shaker source at two different panel locations and the vibrational

response distributed over the panel surface using a scanning laser vibrometer. The binaural simulation

test matrix included test runs for several locations of the measuring microphones, various attitudes of

the mannequin, two locations of the shaker excitation and three different shaker inputs including

pulse, broadband random, and pseudo-random. Transfer functions, auto spectra and coherence

functions were acquired for the pseudo-random excitation. Time histories were acquired for the

pulse and broadband random noise input to the shaker. The tests were repeated with a reflective

surface installed. Binary data files were converted to universal format and archived on compact disk.

Acknowledgements

The outstanding test support from Mr. Carlton Pike, Mr. Jay Moen and Mr. Bob Baals of the Gas,

Fluids and Acoustics Research Support Branch at the NASA Langley Research Center is gratefully

acknowledged. Discussions with Ms. Sherilyn Brown, Ms. Brenda Sullivan and Dr. Stephen Rizzi of

the Structural Acoustics Branch are appreciated. The author wishes to acknowledge Mr. Brad

Lunde, President of SoundField USA/TransAmerica Audio, Las Vegas, NV for providing the Bformat microphone system. This work was supported by the NASA Langley Research Center, SAMS

(NAS1-00135) PBC, Dr. Richard Silcox, Technical Monitor. Funding was provided by the Life

Cycle Simulation element of the Intelligent Synthesis Environment Program under the task entitled

“Structural Acoustic Simulation in Operational Environments.” Dr. Stephen Rizzi, Task Lead.
6

Reference

1. Grosveld, Ferdinand W., “Calibration of the Structural Acoustic Loads and Transmission (SALT) Facility at

NASA Langley Research Center,” INTER-NOISE 99, International Congress on Noise Control Engineering, Fort

Lauderdale, Florida, December 6-8, 1999.

Tables

Table 1. Structural and acoustic data acquisition and analysis equipment

1. Bruel & Kjaer Power Amplifier 2706

2. PCB Piezotronics 482A16 Signal Conditioner/Power supply

3. PCB 4-channel ICP Sensor Signal Conditioner/AC Power Supply 44A101

4. Bruel & Kjaer Mini Shaker Type 4810

5. PCB Piezotronics Shaker Force/Acceleration Transducer 288D01

6. Endevco Isotron PE Accelerometer Model 2250A-10

7. Krohn-Hite Model 3342R Band Pass Filter

8. Ithaco Amplifier Model 455/Power Supply Model P14

9. Larsen Davis Model 812 Type I Integrating Sound Level Meter

10. Bruel & Kjaer Two-channel Microphone Power Supply

11. Bruel & Kjaer Free-field Microphone Type 4165

12. Bruel & Kjaer Pressure Microphone Type 4134

13. General Radio Type 1562-A Sound Level Calibrator

14. GenRad 1986 Omnical Sound Level Calibrator

15. Polytec Scanning Vibrometer Data Acquisition and Display System

16. SDRC I-DEAS/Hewlett Packard/National Instruments Data Acquisition & Analysis

System

17. Knowles Electronics Manikin for Acoustic Research (KEMAR) Mannequin

18. SoundField ST250 Microphone System

Table 2. Components of the Polytec scanning vibrometer data acquisition and display system

1. Polytec Scanning Vibrometer PSV 300

2. Controller OFV-3001S

3. Scanning Head OFV-056

4. Polytec Junction Box PSV-Z-040

5. Prema Arbitrary Function Generator ARB 1000

6. Windows NT 4.0 Workstation, Pentium III – 700 MHz – 128 MB RAM

7. Polytec GmhB Scanning Vibrometer Software Version 7.1

8. Plexwriter 12/4/32 CD-R

Table 3. Components of the SDRC/HP/NI data acquisition and analysis system

1. Hewlett Packard E1421B Mainframe

2. Agilent 16-channel E1432A Front-end Module

3. National Instruments VXI-MXI-2 Plug & Play Interface Card

4. Windows NT 4.0 Workstation, Pentium III – 868 MHz – 256 MB RAM

5. SDRC I-DEAS Software Version 8 with OpenGL Graphics Driver

6. Hewlett Packard Laserjet Printer 4
7

Table 4. Coordinates of measurement locations on aluminum test panel

Panel location Transducer X-coordinate [mm] Y-coordinate [mm] Z-coordinate [mm]

ploc.1

ploc.2

ploc.3

ploc.4

ploc.5

force/accelerometer

accelerometer/force

accelerometer

accelerometer

accelerometer

0

-502

-353

-712

-118

0

-500

0

0

118

0

0

0

0

0

Table 5. Files archived on compact disk 1

Compact Disk 1: 4.5 MB (Compressed ZIP file: 302 KB)

Binpseudo2loc1Scan.bmp Binpseudo2loc2Scan.bmp Binchirp2loc1Scan.bmp

Table 6. Files archived on compact disk 2

Compact Disk 2: 478 MB (Compressed ZIP file: 431 MB)

Binpseudo2loc1Scan.svd Binpseudo2loc2Scan.svd Binchirp2loc1Scan.svd

Table 7. File archived on compact disk 5

Compact Disk 5: 640 MB (ZIP file: 207 MB)

Binpseudo2loc1Scan.unv

Table 8. File archived on compact disk 6

Compact Disk 6: 640 MB (ZIP file: 208 MB)

Bin pseudo2loc2Scan.unv

Table 9. File archived on compact disk 7

Compact Disk 7: 640 MB (ZIP file: 206 MB)

Binchirp2loc1Scan.unv

Table 10. Coordinates of measurement locations in the anechoic room of the SALT facility

Location Transducer X-coordinate

[mm]

Y-coordinate

[mm]

Z-coordinate

[mm]

Loc.1

Loc.2

Loc.3

Loc.4

Loc.5

Loc.6

Loc.7

mannequin/mic-1/B-format mic

mannequin/mic-1/B-format mic

mannequin/mic-1/B-format mic

mannequin/mic-1/B-format mic

reference microphone (ref.mic)

microphone 1 (mic-1)

reference microphone (ref.mic)

0

-1234

0

0

-1526

-1390

0

0

0

0

0

524

0

524

925

1953

3048

3229

1147

3270

3196
8

Table 11. Binaural test matrix for measurements in the anechoic room of the SALT facility

BINAURAL TEST MATRIX IN THE ANECHOIC ROOM OF THE SALT FACILITY

<------ anechoic chamber locations ------> shaker <--- mannequin ---> file names

test loc.1 loc.2 loc.3 loc.4 loc.5 loc.6 ploc. phi.1 phi.2 phi.3 pulse (.ati) random (.ati) transfer (.afu)

1 manikin ref.mic mic-1 2 0 0 0 p1f0-0-0l1f2 r1f0-0-0l1f2 t1f0-0-0l1f2

2 manikin ref.mic mic-1 2 30 0 0 p2f0-30-0l1f2 r2f0-30-0l1f2 t2f0-30-0l1f2

3 manikin ref.mic mic-1 2 90 0 0 p3f0-90-0l1f2 r3f0-90-0l1f2 t3f0-90-0l1f2

4 manikin ref.mic mic-1 2 150 0 0 p4f0-150-0l1f2 r4f0-150-0l1f2 t4f0-150-0l1f2

5 manikin ref.mic mic-1 2 0 30 0 p5f0-30-0l1f2 r5f0-30-0l1f2 t5f0-30-0l1f2

6 manikin ref.mic mic-1 2 0 -30 0 p6f0-n30-0l1f2 r6f0-n30-0l1f2 t6f0-n30-0l1f2

7 manikin ref.mic mic-1 2 0 0 45 p7f0-0-45l1f2 r7f0-0-45l1f2 t7f0-0-45l1f2

8 manikin ref.mic mic-1 2 45 -45 0 p8f45-n45-0l1f2 r8f45-n45-0l1f2 t8f45-n45-0l1f2

9 manikin ref.mic mic-1 2 -30 0 0 p9fn30-0-0l1f2 r9fn30-0-0l1f2 t9fn30-0-0l1f2

10 manikin ref.mic mic-1 2 -115 20 0 p10fn115-20-0l1f2 r10fn115-20-0l1f2 t10fn115-20-0l1f2

11 manikin ref.mic mic-1 2 -45 0 0 p11fn45-0-0l1f2 r11fn45-0-0l1f2 t11fn45-0-0l1f2

12 manikin ref.mic mic-1 2 45 -40 0 p12f45-n40-0l1f2 r12f45-n40-0l1f2 t12f45-n40-0l1f2

13 manikin ref.mic mic-1 2 0 -80 0 p13f0-n80-0l1f2 r13f0-n80-0l1f2 t13f0-n80-0l1f2

14 manikin ref.mic mic-1 2 180 0 0 p14f180-0-0l1f2 r14f180-0-0l1f2 t14f180-0-0l1f2

15 manikin ref.mic mic-1 2 -90 0 0 p15fn90-0-0l1f2 r15fn90-0-0l1f2 t15fn90-0-0l1f2

16 manikin ref.mic mic-1 2 -150 0 0 p16fn150-0-0l1f2 r16fn150-0-0l1f2 t16fn150-0-0l1f2

17 manikin ref.mic mic-1 2 45 0 0 p17f45-0-0l1f2 r17f45-0-0l1f2 t17f45-0-0l1f2

18 manikin ref.mic mic-1 2 -115 -20 0 p18fn115-n20-0l1f2 r18fn115-n20-0l1f2 t18fn115-n20

19 manikin ref.mic mic-1 2 45 20 0 p19f45-20-0l1f2 r19f45-20-0l1f2 t19f45-20-0l1f2

20 manikin ref.mic mic-1 2 45 -20 0 p20f45-n20-0l1f2 r20f45-n20-0l1f2 t20f45-n20-0l1f2

21 manikin ref.mic mic-1 1 0 0 0 p21f0-0-0l1f1 r21f0-0-0l1f1 t21f0-0-0l1f1

22 manikin ref.mic mic-1 1 0 30 0 p22f0-30-0l1f1 r22f0-30-0l1f1 t22f0-30-0l1f1

23 manikin ref.mic mic-1 1 30 0 0 p23f30-0-0l1f1 r23f30-0-0l1f1 t23f30-0-0l1f1

24 manikin ref.mic mic-1 1 90 0 0 p24f90-0-0l1f1 r24f90-0-0l1f1 t24f90-0-0l1f1

25 manikin ref.mic mic-1 1 150 0 0 p25f150-0-0l1f1 r25f150-0-0l1f1 t25f150-0-0l1f1

26 manikin ref.mic mic-1 1 0 -30 0 p26f0-n30-0l1f1 r26f0-n30-0l1f1 t26f0-n30-0l1f1

27 manikin ref.mic mic-1 1 0 0 45 p27f0-0-45l1f1 r27f0-0-45l1f1 t27f0-0-45l1f1

28 manikin ref.mic mic-1 1 45 -45 0 p28f45-n45-0l1f1 r28f45-n45-0l1f1 t28f45-n45-0l1f1

29 manikin ref.mic mic-1 1 -30 0 0 p29fn30-0-0l1f1 r29fn30-0-0l1f1 t29fn30-0-0l1f1

30 manikin ref.mic mic-1 1 0 0 0 p30f0-0-0l2f1 r30f0-0-0l2f1 t30f0-0-0l2f1

31 manikin ref.mic mic-1 1 -32.3 0 0 p31fn32-0-0l2f1 r31fn32-0-0l2f1 t31fn32-0-0l2f1

32 manikin ref.mic mic-1 2 0 0 0 p32f0-0-0l2f2 r32f0-0-0l2f2 t32f0-0-0l2f2

33 manikin ref.mic mic-1 2 -32.3 0 0 p33fn32-0-0l2f2 r33fn32-0-0l2f2 t33fn32-0-0l2f2

34 manikin ref.mic mic-1 2 -32.3 30 0 p34fn32-30-0l2f2 r34fn32-30-0l2f2 t34fn32-30-0l2f2

35 manikin ref.mic mic-1 2 -45 0 0 p35fn45-0-0l3f2 r35fn45-0-0l3f2 t35fn45-0-0l3f2 1

36 bformat mic-1 ref.mic 2 p36bml12f2 r36bml12f2 t36bml12f2 2

37 bformat mic-1 ref.mic 1 p37bml12f1 r37bml12f1 t37bml12f1 2

38 mic-1 bformat ref.mic 1 p38bml21f1 r38bml21f1 t38bml21f1 2

39 mic-1 bformat ref.mic 2 p39bml21f2input10v r39bml21f2 t39bml21f2 2,3

40 bformat mic-1 ref.mic 2 p40bml34f2input10vgain20dBYZ r40bml34f2input10vgain20dBYZ t40bml34f2gain20dBYZ 2,3,4,5

41 mic-1 bformat ref.mic 2 p41bml43f2input10v r41bml43f2input10v t41bml43f2 2,3,4

42 mic-1 bformat ref.mic 1 p42bml43f1input10v r42bml43f1input10v t42bml43f1 2,3,4

43 bformat mic-1 ref.mic 1 p43bml34f1input10vgain20dBYZ r43bml34f1input10vgain20dBYZ t43bml34f1gain20dBYZ 2,3,4,5

Table 12. Special measurement conditions for the binaural tests

1)An additional gain of 20 dB was applied to the mannequin microphone output signals for test 35 only

2)The microphone mic-1 was changed from a pressure microphone to a free-field microphone for tests 36-43

3)The pulse input signal was changed from 4 V to 10 V for tests 39-43

4)The pseudo random time input signals were changed from 4 V to 10 V for tests 40-43 and 1a-47a

5)An additional gain of 20 dB was applied to the Y and Z channels of the B-format microphone for tests 40 and 43
9

Table 13. Channel calibration settings

Channe

l

Transducer Unit Gain

[dB]

Sensitivity

[mV/EU]

Tests

1.

2.

3.

4.

5.

6.

7.

7.

8.

8.

9.

10.

11.

12.

13.

14.

force

accel 1

accel 2

accel 3

accel 4

accel 5

ref.mic (pressure)

ref.mic (pressure)

mic-1 (pressure)

mic-1 (free field)

manikin left

manikin right

B-format W

B-format X

B-format Y

B-format Z

N

m/s2

m/s2

m/s2

m/s2

m/s2

Pa

Pa

Pa

Pa

Pa

Pa

Pa

Pa

Pa

Pa

0

0

0

0

0

40

20

20

20

20

10

10

0

0

0

0

22.471

10.3807

1.05031

1.05031

1.08090

1.05031

8.54757

9.29095

9.34275

38.3264

132.32

133.318

158.114

223.342

223.342

223.342

1-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

1-35

36-43; 1a-47a

1-35

36-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

1-43; 1a-47a

Table 14. Initial data acquisition sampling, trigger, window, averaging, filter and measurement conditions

Pulse

excitation

Random

excitation

Pseudo-random

excitation

Spectral lines

Delta frequency

Maximum frequency

Minimum frequency

Frame size

Frame length

Delta time

Sampling frequency

Trigger method

Trigger source

Trigger level

Window

Averaging method

Exponential average constant

Frames per average

Low-pass filter

Time history

Auto spectrum

Transfer function

Coherence

6401

0.625 Hz

4000.0 Hz

0 Hz

16384

1.6 sec

9.77E-05 sec

10240.0 Hz

First frame

Manual

Off

None

Stable

5

3

No

Yes

No

No

No

6401

0.625 Hz

4000.0 Hz

0 Hz

16384

1.6 sec

9.77E-05 sec

10240.0 Hz

First frame

Manual

Off

None

Stable

5

5

2000 Hz

Yes

No

No

No

6401

0.625 Hz

4000.0 Hz

0 Hz

16384

1.6 sec

9.77E-05 sec

10240.0 Hz

Every frame

Shaker

10%

Hanning narrow

Stable

5

10

No

No

Yes

Yes

Yes
10

Table 15. Binaural test matrix for measurements with the reflective surface

in the anechoic room of the SALT facility

BINAURAL TEST MATRIX IN THE ANECHOIC ROOM OF THE SALT FACILITY REFLECTIVE SURFACE

<--- anechoic chamber locations ---> shaker <--- mannequin ---> file names

test loc.1 loc.2 loc.3 loc.4 loc.7 b.psi ploc. phi.1 phi.2 phi.3 pulse (.ati) random (.ati) transfer (.afu)

1a manikin ref.mic 2 0 0 0 ap1f0-0-0l1f2 ar1f0-0-0l1f2 at1f0-0-0l1f2

2a manikin ref.mic 2 30 0 0 ap2f0-30-0l1f2 ar2f0-30-0l1f2 at2f0-30-0l1f2

3a manikin ref.mic 2 90 0 0 ap3f0-90-0l1f2 ar3f0-90-0l1f2 at3f0-90-0l1f2

4a manikin ref.mic 2 150 0 0 ap4f0-150-0l1f2 ar4f0-150-0l1f2 at4f0-150-0l1f2

5a manikin ref.mic 2 0 30 0 ap5f0-30-0l1f2 ar5f0-30-0l1f2 at5f0-30-0l1f2

6a manikin ref.mic 2 0 -30 0 ap6f0-n30-0l1f2 ar6f0-n30-0l1f2 at6f0-n30-0l1f2

7a manikin ref.mic 2 0 0 45 ap7f0-0-45l1f2 ar7f0-0-45l1f2 at7f0-0-45l1f2

8a manikin ref.mic 2 45 -45 0 ap8f45-n45-0l1f2 ar8f45-n45-0l1f2 at8f45-n45-0l1f2

9a manikin ref.mic 2 -30 0 0 ap9fn30-0-0l1f2 ar9fn30-0-0l1f2 at9fn30-0-0l1f2

10a manikin ref.mic 2 -115 20 0 ap10fn115-20-0l1f2 ar10fn115-20-0l1f2 at10fn115-20-0l1f2

11a manikin ref.mic 2 -45 0 0 ap11fn45-0-0l1f2 ar11fn45-0-0l1f2 at11fn45-0-0l1f2

12a manikin ref.mic 2 45 -40 0 ap12f45-n40-0l1f2 ar12f45-n40-0l1f2 at12f45-n40-0l1f2

13a manikin ref.mic 2 0 -80 0 ap13f0-n80-0l1f2 ar13f0-n80-0l1f2 at13f0-n80-0l1f2

14a manikin ref.mic 2 180 0 0 ap14f180-0-0l1f2 ar14f180-0-0l1f2 at14f180-0-0l1f2

15a manikin ref.mic 2 -90 0 0 ap15fn90-0-0l1f2 ar15fn90-0-0l1f2 at15fn90-0-0l1f2

16a manikin ref.mic 2 -150 0 0 ap16fn150-0-0l1f2 ar16fn150-0-0l1f2 at16fn150-0-0l1f2

17a manikin ref.mic 2 45 0 0 ap17f45-0-0l1f2 ar17f45-0-0l1f2 at17f45-0-0l1f2

18a manikin ref.mic 2 -115 -20 0 ap18fn115-n20-0l1f2 ar18fn115-n20-0l1f2 at18fn115-n20

19a manikin ref.mic 2 45 20 0 ap19f45-20-0l1f2 ar19f45-20-0l1f2 at19f45-20-0l1f2

20a manikin ref.mic 2 45 -20 0 ap20f45-n20-0l1f2 ar20f45-n20-0l1f2 at20f45-n20-0l1f2

21a manikin ref.mic 1 0 0 0 ap21f0-0-0l1f1 ar21f0-0-0l1f1 at21f0-0-0l1f1

22a manikin ref.mic 1 0 30 0 ap22f0-30-0l1f1 ar22f0-30-0l1f1 at22f0-30-0l1f1

23a manikin ref.mic 1 30 0 0 ap23f30-0-0l1f1 ar23f30-0-0l1f1 at23f30-0-0l1f1

24a manikin ref.mic 1 90 0 0 ap24f90-0-0l1f1 ar24f90-0-0l1f1 at24f90-0-0l1f1

25a manikin ref.mic 1 150 0 0 ap25f150-0-0l1f1 ar25f150-0-0l1f1 at25f150-0-0l1f1

26a manikin ref.mic 1 0 -30 0 ap26f0-n30-0l1f1 ar26f0-n30-0l1f1 at26f0-n30-0l1f1

27a manikin ref.mic 1 0 0 45 ap27f0-0-45l1f1 ar27f0-0-45l1f1 at27f0-0-45l1f1

28a manikin ref.mic 1 45 -45 0 ap28f45-n45-0l1f1 ar28f45-n45-0l1f1 at28f45-n45-0l1f1

29a manikin ref.mic 1 -30 0 0 ap29fn30-0-0l1f1 ar29fn30-0-0l1f1 at29fn30-0-0l1f1

30a manikin ref.mic 1 0 0 0 ap30f0-0-0l2f1 ar30f0-0-0l2f1 at30f0-0-0l2f1

31a manikin ref.mic 1 -32.3 0 0 ap31fn32-0-0l2f1 ar31fn32-0-0l2f1 at31fn32-0-0l2f1

32a manikin ref.mic 2 0 0 0 ap32f0-0-0l2f2 ar32f0-0-0l2f2 at32f0-0-0l2f2

33a manikin ref.mic 2 -32.3 0 0 ap33fn32-0-0l2f2 ar33fn32-0-0l2f2 at33fn32-0-0l2f2

34a manikin ref.mic 2 -32.3 30 0 ap34fn32-30-0l2f2 ar34fn32-30-0l2f2 at34fn32-30-0l2f2

36a bformat mic-1 ref.mic 2 ap36bml12f2 ar36bml12f2 at36bml12f2

37a bformat mic-1 ref.mic 1 ap37bml12f1 ar37bml12f1 at37bml12f1

38a mic-1 bformat ref.mic 1 ap38bml21f1 ar38bml21f1 at38bml21f1

39a mic-1 bformat ref.mic 2 ap39bml21f2input10v ar39bml21f2 at39bml21f2

44a bformat 0 2 ap44b000f-0-0-0l12f1 ar44b000f-0-0-0l12f1 at44b000f-0-0-0l12f1

45a bformat 90 2 ap45b090f-0-0-0l12f1 ar45b090f-0-0-0l12f1 at45b090f-0-0-0l12f1

46a bformat 180 2 ap46b180f-0-0-0l12f1 ar46b180f-0-0-0l12f1 at46b180f-0-0-0l12f1

47a bformat 270 2 ap47b270f-0-0-0l12f1 ar47b270f-0-0-0l12f1 at47b270f-0-0-0l12f1
11

Table 16. Files archived on compact disk 8

Compact Disk 8: 388 MB (Compressed ZIP file: 204MB)

t10fn115-20-0l1f2.afu

t11fn45-0-0l1f2.afu

t12f45-n40-0l1f2.afu

t13f0-n80-0l1f2.afu

t14f180-0-0l1f2.afu

t15fn90-0-0l1f2.afu

t16fn150-0-0l1f2.afu

t17f45-0-0l1f2.afu

t18fn115-n20-0l1f2.afu

t19f45-20-0l1f2.afu

t1f0-0-0l1f2.afu

t20f45-n20-0l1f2.afu

t21f0-0-0l1f1.afu

t22f0-30-0l1f1.afu

t23f30-0-0l1f1.afu

t24f90-0-0l1f1.afu

t25f150-0-0l1f1.afu

t26f0-n30-0l1f1.afu

t27f0-0-45l1f1.afu

t28f45-n45-0l1f1.afu

t29fn30-0-0l1f1.afu

t2f0-30-0l1f2.afu

t30f0-0-0l2f1.afu

t31fn32-0-0l2f1.afu

t32f0-0-0l2f2.afu

t33fn32-0-0l2f2.afu

t34fn32-30-0l2f2.afu

t35fn45-0-0l3f2.afu

t36bml12f2.afu

t37bml12f1.afu

t38bml21f1.afu

t39bml21f2.afu

t3f0-90-0l1f2.afu

t40bml34f2.afu

t40bml34f2gain20dBYZ.afu

t41bml43f2.afu

t42bml43f1.afu

t43bml34f1.afu

t43bml34f1gain20dBYZ.afu

t4f0-150-0l1f2.afu

t5f0-30-0l1f2.afu

t6f0-n30-0l1f2.afu

t7f0-0-45l1f2.afu

t8f45-n45-0l1f2.afu

t9fn30-0-0l1f2.afu

p10fn115-20-0l1f2.ati

p11fn45-0-0l1f2.ati

p12f45-n40-0l1f2.ati

p13f0-n80-0l1f2.ati

p14f180-0-0l1f2.ati

p15fn90-0-0l1f2.ati

p16fn150-0-0l1f2.ati

p17f45-0-0l1f2.ati

p18fn115-n20-0l1f2.ati

p19f45-20-0l1f2.ati

p1f0-0-0l1f2.ati

p20f45-n20-0l1f2.ati

p21f0-0-0l1f1.ati

p22f0-30-0l1f1.ati

p23f30-0-0l1f1.ati

p24f90-0-0l1f1.ati

p25f150-0-0l1f1.ati

p26f0-n30-0l1f1.ati

p27f0-0-45l1f1.ati

p28f45-n45-0l1f1.ati

p29fn30-0-0l1f1.ati

p2f0-30-0l1f2.ati

p30f0-0-0l2f1.ati

p31fn32-0-0l2f1.ati

p32f0-0-0l2f2.ati

p33fn32-0-0l2f2.ati

p34fn32-30-0l2f2.ati

p35fn45-0-0l3f2.ati

p36bml12f2.ati

p37bml12f1.ati

p38bml21f1.ati

p39bml21f2input10v.ati

p3f0-90-0l1f2.ati

p40bml34f2input10vgain20dBYZ.ati

p41bml43f2input10v.ati

p42bml43f1input10v.ati

p43bml34f1input10vgain20dBYZ.ati

p4f0-150-0l1f2.ati

p5f0-30-0l1f2.ati

p6f0-n30-0l1f2.ati

p7f0-0-45l1f2.ati

p8f45-n45-0l1f2.ati

p9fn30-0-0l1f2.ati

sincfun.ati

t25f150-0-0l1f1background.afu

r10fn115-20-0l1f2.ati

r11fn45-0-0l1f2.ati

r12f45-n40-0l1f2.ati

r13f0-n80-0l1f2.ati

r14f180-0-0l1f2.ati

r15fn90-0-0l1f2.ati

r16fn150-0-0l1f2.ati

r17f45-0-0l1f2.ati

r18fn115-n20-0l1f2.ati

r19f45-20-0l1f2.ati

r1f0-0-0l1f2.ati

r20f45-n20-0l1f2.ati

r21f0-0-0l1f1.ati

r22f0-30-0l1f1.ati

r23f30-0-0l1f1.ati

r24f90-0-0l1f1.ati

r25f150-0-0l1f1.ati

r26f0-n30-0l1f1.ati

r27f0-0-45l1f1.ati

r28f45-n45-0l1f1.ati

r29fn30-0-0l1f1.ati

r2f0-30-0l1f2.ati

r30f0-0-0l2f1.ati

r31fn32-0-0l2f1.ati

r32f0-0-0l2f2.ati

r33fn32-0-0l2f2.ati

r34fn32-30-0l2f2.ati

r35fn45-0-0l3f2.ati

r36bml12f2.ati

r37bml12f1.ati

r38bml21f1.ati

r39bml21f2.ati

r3f0-90-0l1f2.ati

r40bml34f2input10v.ati

r40bml34f2input10vgain20dBYZ.ati

r41bml43f2input10v.ati

r42bml43f1input10v.ati

r43bml34f1input10v.ati

r43bml34f1input10vgain20dBYZ.ati

r4f0-150-0l1f2.ati

r5f0-30-0l1f2.ati

r6f0-n30-0l1f2.ati

r7f0-0-45l1f2.ati

r8f45-n45-0l1f2.ati

r9fn30-0-0l1f2.ati
12

Table 17. Files archived on compact disk 9

Compact Disk 9: 359 MB (Compressed ZIP file: 185 MB)

at10fn115-20-0l1f2.afu

at11fn45-0-0l1f2.afu

at12f45-n40-0l1f2.afu

at13f0-n80-0l1f2.afu

at14f180-0-0l1f2.afu

at15fn90-0-0l1f2.afu

at16fn150-0-0l1f2.afu

at17f45-0-0l1f2.afu

at18fn115-n20-0l1f2.afu

at19f45-20-0l1f2.afu

at1f0-0-0l1f2.afu

at20f45-n20-0l1f2.afu

at21f0-0-0l1f1.afu

at22f0-30-0l1f1.afu

at23f30-0-0l1f1.afu

at24f90-0-0l1f1.afu

at25f150-0-0l1f1.afu

at26f0-n30-0l1f1.afu

at27f0-0-45l1f1.afu

at28f45-n45-0l1f1.afu

at29fn30-0-0l1f1.afu

at2f0-30-0l1f2.afu

at30f0-0-0l2f1.afu

at31fn32-0-0l2f1.afu

at32f0-0-0l2f2.afu

at33fn32-0-0l2f2.afu

at34fn32-30-0l2f2.afu

at36bml12f2.afu

at37bml12f1.afu

at38bml21f1.afu

at39bml21f2.afu

at3f0-90-0l1f2.afu

at44b000f-0-0-0l12f1.afu

at45b090f-0-0-0l12f1.afu

at46b180f-0-0-0l12f1.afu

at47b270f-0-0-0l12f1.afu

at4f0-150-0l1f2.afu

at5f0-30-0l1f2.afu

at6f0-n30-0l1f2.afu

at7f0-0-45l1f2.afu

at8f45-n45-0l1f2.afu

at9fn30-0-0l1f2.afu

ap10fn115-20-0l1f2.ati

ap11fn45-0-0l1f2.ati

ap12f45-n40-0l1f2.ati

ap13f0-n80-0l1f2.ati

ap14f180-0-0l1f2.ati

ap15fn90-0-0l1f2.ati

ap16fn150-0-0l1f2.ati

ap17f45-0-0l1f2.ati

ap18fn115-n20-0l1f2.ati

ap19f45-20-0l1f2.ati

ap1f0-0-0l1f2.ati

ap20f45-n20-0l1f2.ati

ap21f0-0-0l1f1.ati

ap22f0-30-0l1f1.ati

ap23f30-0-0l1f1.ati

ap24f90-0-0l1f1.ati

ap25f150-0-0l1f1.ati

ap26f0-n30-0l1f1.ati

ap27f0-0-45l1f1.ati

ap28f45-n45-0l1f1.ati

ap29fn30-0-0l1f1.ati

ap2f0-30-0l1f2.ati

ap30f0-0-0l2f1.ati

ap31fn32-0-0l2f1.ati

ap32f0-0-0l2f2.ati

ap33fn32-0-0l2f2.ati

ap34fn32-30-0l2f2.ati

ap36bml12f2.ati

ap37bml12f1.ati

ap38bml21f1.ati

ap39bml21f2.ati

ap3f0-90-0l1f2.ati

ap44b000f-0-0-0l12f1.ati

ap45b090f-0-0-0l12f1.ati

ap46b180f-0-0-0l12f1.ati

ap47b270f-0-0-0l12f1.ati

ap4f0-150-0l1f2.ati

ap5f0-30-0l1f2.ati

ap6f0-n30-0l1f2.ati

ap7f0-0-45l1f2.ati

ap8f45-n45-0l1f2.ati

ap9fn30-0-0l1f2.ati

ar10fn115-20-0l1f2.ati

ar11fn45-0-0l1f2.ati

ar12f45-n40-0l1f2.ati

ar13f0-n80-0l1f2.ati

ar14f180-0-0l1f2.ati

ar15fn90-0-0l1f2.ati

ar16fn150-0-0l1f2.ati

ar17f45-0-0l1f2.ati

ar18fn115-n20-0l1f2.ati

ar19f45-20-0l1f2.ati

ar1f0-0-0l1f2.ati

ar20f45-n20-0l1f2.ati

ar21f0-0-0l1f1.ati

ar22f0-30-0l1f1.ati

ar23f30-0-0l1f1.ati

ar24f90-0-0l1f1.ati

ar25f150-0-0l1f1.ati

ar26f0-n30-0l1f1.ati

ar27f0-0-45l1f1.ati

ar28f45-n45-0l1f1.ati

ar29fn30-0-0l1f1.ati

ar2f0-30-0l1f2.ati

ar30f0-0-0l2f1.ati

ar31fn32-0-0l2f1.ati

ar32f0-0-0l2f2.ati

ar33fn32-0-0l2f2.ati

ar34fn32-30-0l2f2.ati

ar36bml12f2.ati

ar37bml12f1.ati

ar38bml21f1.ati

ar39bml21f2.ati

ar3f0-90-0l1f2.ati

ar44b000f-0-0-0l12f1.ati

ar45b090f-0-0-0l12f1.ati

ar46b180f-0-0-0l12f1.ati

ar47b270f-0-0-0l12f1.ati

ar4f0-150-0l1f2.ati

ar5f0-30-0l1f2.ati

ar6f0-n30-0l1f2.ati

ar7f0-0-45l1f2.ati

ar8f45-n45-0l1f2.ati

ar9fn30-0-0l1f2.ati
13

Table 18. Files archived on compact disk 10

Compact Disk 10: 642 MB (Compressed ZIP file: 164 MB)

r10fn115-20-0l1f2.unv

r11fn45-0-0l1f2.unv

r12f45-n40-0l1f2.unv

r13f0-n80-0l1f2.unv

r14f180-0-0l1f2.unv

r15fn90-0-0l1f2.unv

r16fn150-0-0l1f2.unv

r17f45-0-0l1f2.unv

r18fn115-n20-

0l1f2.unv

r19f45-20-0l1f2.unv

r1f0-0-0l1f2.unv

r20f45-n20-0l1f2.unv

r21f0-0-0l1f1.unv

r22f0-30-0l1f1.unv

r23f30-0-0l1f1.unv

r24f90-0-0l1f1.unv

r25f150-0-0l1f1.unv

r26f0-n30-0l1f1.unv

r27f0-0-45l1f1.unv

r28f45-n45-0l1f1.unv

r29fn30-0-0l1f1.unv

r2f0-30-0l1f2.unv

r30f0-0-0l2f1.unv

r31fn32-0-0l2f1.unv

r32f0-0-0l2f2.unv

r33fn32-0-0l2f2.unv

r34fn32-30-0l2f2.unv

r35fn45-0-0l3f2.unv

r36bml12f2.unv

r37bml12f1.unv

r38bml21f1.unv

r39bml21f2.unv

r3f0-90-0l1f2.unv

r40bml34f2input10v.unv

r40bml34f2input10vgain20dBYZ.unv

r42bml43f1input10v.unv

r43bml34f1input10v.unv

r43bml34f1input10vgain20dBYZ.unv

r4f0-150-0l1f2.unv

r5f0-30-0l1f2repeat.unv

r6f0-n30-0l1f2.unv

r7f0-0-45l1f2.unv

r8f45-n45-0l1f2.unv

r9fn30-0-0l1f2.unv

Table 19. Files archived on compact disk 11

Compact Disk 11: 598 MB (Compressed ZIP file: 125 MB)

p10fn115-20-0l1f2.unv

p11fn45-0-0l1f2.unv

p12f45-n40-0l1f2.unv

p13f0-n80-0l1f2.unv

p14f180-0-0l1f2.unv

p15fn90-0-0l1f2.unv

p16fn150-0-0l1f2.unv

p17f45-0-0l1f2.unv

p18fn115-n20-0l1f2.unv

p19f45-20-0l1f2.unv

p1f0-0-0l1f2.unv

p20f45-n20-0l1f2.unv

p21f0-0-0l1f1.unv

p22f0-30-0l1f1.unv

p23f30-0-0l1f1.unv

p24f90-0-0l1f1.unv

p25f150-0-0l1f1.unv

p26f0-n30-0l1f1.unv

p27f0-0-45l1f1.unv

p28f45-n45-0l1f1.unv

p29fn30-0-0l1f1.unv

p2f0-30-0l1f2.unv

p30f0-0-0l2f1.unv

p31fn32-0-0l2f1.unv

p32f0-0-0l2f2.unv

p33fn32-0-0l2f2.unv

p34fn32-30-0l2f2.unv

p35fn45-0-0l3f2.unv

p36bml12f2.unv

p37bml12f1.unv

p38bml21f1.unv

p3f0-90-0l1f2.unv

p40bml34f2input10vgain20dBYZ.unv

p41bml43f2input10v.unv

p42bml43f1input10v.unv

p43bml34f1input10vgain20dBYZ.unv

p4f0-150-0l1f2.unv

p5f0-30-0l1f2repeat.unv

p6f0-n30-0l1f2repeat.unv

p7f0-0-45l1f2.unv

p8f45-n45-0l1f2.unv

p9fn30-0-0l1f2.unv

r5f0-30-0l1f2repeat.unv

sincfun.unv

t10fn115-20-0l1f2.unv

t11fn45-0-0l1f2.unv

t12f45-n40-0l1f2.unv

t13f0-n80-0l1f2.unv

t14f180-0-0l1f2.unv

t15fn90-0-0l1f2.unv

t16fn150-0-0l1f2.unv

t17f45-0-0l1f2.unv

t18fn115-n20-0l1f2.unv

t19f45-20-0l1f2.unv

t1f0-0-0l1f2.unv

t20f45-n20-0l1f2.unv

t21f0-0-0l1f1.unv

t22f0-30-0l1f1.unv

t23f30-0-0l1f1.unv

t24f90-0-0l1f1.unv

t25f150-0-0l1f1.unv

t25f150-0-0l1f1background.unv

t26f0-n30-0l1f1.unv

t30f0-0-0l2f1.unv

t27f0-0-45l1f1.unv

t28f45-n45-0l1f1.unv

t29fn30-0-0l1f1.unv

t2f0-30-0l1f2.unv

t31fn32-0-0l2f1.unv

t32f0-0-0l2f2.unv

t33fn32-0-0l2f2.unv

t34fn32-30-0l2f2.unv

t35fn45-0-0l3f2.unv

t36bml12f2.unv

t37bml12f1.unv

t38bml21f1.unv

t39bml21f2.unv

t3f0-90-0l1f2.unv

t40bml34f2.unv

t40bml34f2gain20dBYZ.unv

t41bml43f2.unv

t42bml43f1.unv

t43bml34f1.unv

t43bml34f1gain20dBYZ.unv

t4f0-150-0l1f2.unv

t5f0-30-0l1f2.unv

t6f0-n30-0l1f2.unv

t7f0-0-45l1f2.unv

t8f45-n45-0l1f2.unv

t9fn30-0-0l1f2.unv
14

Table 20. Files archived on compact disk 12

Compact Disk 12: 613 MB (Compressed ZIP file: 154 MB)

ar10fn115-20-0l1f2.unv

ar11fn45-0-0l1f2.unv

ar12f45-n40-0l1f2.unv

ar13f0-n80-0l1f2.unv

ar14f180-0-0l1f2.unv

ar15fn90-0-0l1f2.unv

ar16fn150-0-0l1f2.unv

ar17f45-0-0l1f2.unv

ar18fn115-n20-0l1f2.unv

ar19f45-20-0l1f2.unv

ar1f0-0-0l1f2.unv

ar20f45-n20-0l1f2.unv

ar21f0-0-0l1f1.unv

ar22f0-30-0l1f1.unv

ar23f30-0-0l1f1.unv

ar24f90-0-0l1f1.unv

ar25f150-0-0l1f1.unv

ar26f0-n30-0l1f1.unv

ar27f0-0-45l1f1.unv

ar28f45-n45-0l1f1.unv

ar29fn30-0-0l1f1.unv

ar2f0-30-0l1f2.unv

ar30f0-0-0l2f1.unv

ar31fn32-0-0l2f1.unv

ar32f0-0-0l2f2.unv

ar33fn32-0-0l2f2.unv

ar34fn32-30-0l2f2.unv

ar36bml12f2.unv

ar37bml12f1.unv

ar38bml21f1.unv

ar39bml21f2.unv

ar3f0-90-0l1f2.unv

ar44b000f-0-0-0l12f1.unv

ar45b090f-0-0-0l12f1.unv

ar46b180f-0-0-0l12f1.unv

ar47b270f-0-0-0l12f1.unv

ar4f0-150-0l1f2.unv

ar5f0-30-0l1f2.unv

ar6f0-n30-0l1f2.unv

ar7f0-0-45l1f2.unv

ar8f45-n45-0l1f2.unv

ar9fn30-0-0l1f2.unv

Table 21. Files archived on compact disk 13

Compact Disk 12: 597 MB (Compressed ZIP file: 118 MB)

ap10fn115-20-0l1f2.unv

ap11fn45-0-0l1f2.unv

ap12f45-n40-0l1f2.unv

ap13f0-n80-0l1f2.unv

ap14f180-0-0l1f2.unv

ap15fn90-0-0l1f2.unv

ap16fn150-0-0l1f2.unv

ap17f45-0-0l1f2.unv

ap18fn115-n20-0l1f2.unv

ap19f45-20-0l1f2.unv

ap1f0-0-0l1f2.unv

ap20f45-n20-0l1f2.unv

ap21f0-0-0l1f1.unv

ap22f0-30-0l1f1.unv

ap23f30-0-0l1f1.unv

ap24f90-0-0l1f1.unv

ap25f150-0-0l1f1.unv

ap26f0-n30-0l1f1.unv

ap27f0-0-45l1f1.unv

ap28f45-n45-0l1f1.unv

ap29fn30-0-0l1f1.unv

ap2f0-30-0l1f2.unv

ap30f0-0-0l2f1.unv

ap31fn32-0-0l2f1.unv

ap32f0-0-0l2f2.unv

ap33fn32-0-0l2f2.unv

ap34fn32-30-0l2f2.unv

ap36bml12f2.unv

ap37bml12f1.unv

ap38bml21f1.unv

ap39bml21f2.unv

ap3f0-90-0l1f2.unv

ap44b000f-0-0-0l12f1.unv

ap45b090f-0-0-0l12f1.unv

ap46b180f-0-0-0l12f1.unv

ap47b270f-0-0-0l12f1.unv

ap4f0-150-0l1f2.unv

ap5f0-30-0l1f2.unv

ap6f0-n30-0l1f2.unv

ap7f0-0-45l1f2.unv

ap8f45-n45-0l1f2.unv

ap9fn30-0-0l1f2.unv

at10fn115-20-0l1f2.unv

at11fn45-0-0l1f2.unv

at12f45-n40-0l1f2.unv

at13f0-n80-0l1f2.unv

at14f180-0-0l1f2.unv

at15fn90-0-0l1f2.unv

at16fn150-0-0l1f2.unv

at17f45-0-0l1f2.unv

at18fn115-n20-0l1f2.unv

at19f45-20-0l1f2.unv

at1f0-0-0l1f2.unv

at20f45-n20-0l1f2.unv

at21f0-0-0l1f1.unv

at22f0-30-0l1f1.unv

at23f30-0-0l1f1.unv

at24f90-0-0l1f1.unv

at25f150-0-0l1f1.unv

at26f0-n30-0l1f1.unv

at27f0-0-45l1f1.unv

at28f45-n45-0l1f1.unv

at29fn30-0-0l1f1.unv

at2f0-30-0l1f2.unv

at30f0-0-0l2f1.unv

at31fn32-0-0l2f1.unv

at32f0-0-0l2f2.unv

at33fn32-0-0l2f2.unv

at34fn32-30-0l2f2.unv

at36bml12f2.unv

at37bml12f1.unv

at38bml21f1.unv

at39bml21f2.unv

at3f0-90-0l1f2.unv

at44b000f-0-0-0l12f1.unv

at45b090f-0-0-0l12f1.unv

at46b180f-0-0-0l12f1.unv

at47b270f-0-0-0l12f1.unv

at4f0-150-0l1f2.unv

at5f0-30-0l1f2.unv

at6f0-n30-0l1f2.unv

at7f0-0-45l1f2.unv

at8f45-n45-0l1f2.unv

at9fn30-0-0l1f2.unv

p5f0-30-0l1f2repeat.unv

p6f0-n30-0l1f2repeat.unv

r5f0-30-0l1f2repeat.unv

sincfun.unv
15

Figures

ˇ ̨ ̋ ̨ ̧ ̊ ̨ ̧ ̇ ̆ ̄ ̃ˆıÙÛ ̇Ú ̊ ̨ ̧

ı ̄ˆ ̃

 ̃ ̆ ̄ı ̨ ̨

 ̨

 ̃ ̃ ̧

 ̃ ̋ ̇ ̊ ̨ı ̇ ̧ ̆ ̄ ̆ ̄ ̃ˆ

ˆ ̨Û ̃ ̄ıÙÛ ̇Ú ̊ ̨ ̧

 ̃ı ̆

 ̃ ̨

Figure 1. Reverberation chamber, anechoic chamber

and the transmission loss window of the Structural

Acoustics Transmission and Loads (SALT) facility.

 ̃ ̆ ̄

 ̨ ̨

 ̨ ̆

 ̇ˆ ̨

ı ̄ˆ ̃

 ̨

 ̃ ̃ ̧

Figure 2. Cross-sectional view of the anechoic

chamber showing the transmission loss window.

(The stairwell was filled with absorptive materials

and covered by a slab of concrete.)

Figure 3. Reverberant chamber view of the

aluminum panel installed in the transmission loss

window.

Figure 4. View of the 4.9-mm thick aluminum panel

with the force and accelerometer transducers of the

mini shaker at location ploc.2, three accelerometers

on the panel and one accelerometer mounted on the

frame.
16

Figure 5. Close-up view of the combined force and

accelerometer transducers of the mini shaker.

Figure 6. Close-up view of the three accelerometers

mounted on the aluminum panel.

Figure 7. Cartesian panel coordinate system. Figure 8. Close-up of the scanning laser vibrometer.

Figure 9. The scanning laser vibrometer measuring

the two-dimensional distribution of vibrational panel

velocities.

Figure 10. The 23 by 23 measurement grid

superimposed on the video image taken by the laser

vibrometer system.
17

Figure 11. The Knowles Electronics Manikin for

Acoustic Research (KEMAR).

Figure 12. Local mannequin Cartesian coordinate

system and the positive rotation directions.

Figure 13. The Z-axis of the mannequin aligned

with the center of the test panel (Test 1 in Table 11).

Figure 14. The KEMAR mannequin rotated 45

degrees about the Y-axis and minus 45 degrees about

the X-axis (Test 8 in Table 11).

Figure 15. A reflective panel added to the test set-up

(Test 1a in Table 15) with a laser alignment tool on

the left and the B-format microphone on the right.

Figure 16. The mannequin rotated 150 degrees

about the Y-axis (Test 4a in Table 15).
18

Figure 17. The mannequin rotated 45 degrees about

the Z-axis (Test 7a in Table 15).

Figure 18. B-format microphone at measurement

location loc.1 (Test 36a in Table 15).

Figure 19. The mannequin at location loc.2 rotated

minus 32.3 degrees about the Y-axis and 30 degrees

about the X-axis (Test 34a in Table 15).

Figure 20. View of the B-format microphone at

measurement location loc.1 with the mannequin in

the foreground at measurement location loc.2.
REPORT DOCUMENTATION PAGE Form Approved

OMB No. 0704-0188

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data

sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other

aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and

Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188),

Washington, DC 20503.

1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE

December 2001

3. REPORT TYPE AND DATES COVERED

Contractor Report

4. TITLE AND SUBTITLE

Binaural Simulation Experiments in the NASA Langley Structural

Acoustics Loads and Transmission Facility

5. FUNDING NUMBERS

NAS1-00135

WU 705-30-11-13

6. AUTHOR(S)

Ferdinand W. Grosveld 

7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)

 

 Lockheed Martin Engineering and Sciences

 NASA Langley Research Center

 Hampton, Virginia 23681-2199

8. PERFORMING ORGANIZATION

REPORT NUMBER

 

9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)

National Aeronautics and Space Administration

Langley Research Center

Hampton, VA 23681-2199

10. SPONSORING/MONITORING

AGENCY REPORT NUMBER

NASA/CR-2001-211255

11. SUPPLEMENTARY NOTES

Funding for this work was provided by the Life Cycle Simulation element of the Intelligent Synthesis

Environment Program under the task entitled "Structural Acoustic Simulation in Operational Environments."

S. A. Rizzi of NASA LaRC was task lead.

12a. DISTRIBUTION/AVAILABILITY STATEMENT

Unclassified-Unlimited

Subject Category 71 Distribution: Standard

Availability: NASA CASI (301) 621-0390

12b. DISTRIBUTION CODE

13. ABSTRACT (Maximum 200 words)

A location and positioning system was developed and implemented in the anechoic chamber of the Structural

Acoustics Loads and Transmission (SALT) facility to accurately determine the coordinates of points in threedimensional space. Transfer functions were measured between a shaker source at two different panel locations

and the vibrational response distributed over the panel surface using a scanning laser vibrometer. The binaural

simulation test matrix included test runs for several locations of the measuring microphones, various attitudes of

the mannequin, two locations of the shaker excitation and three different shaker inputs including pulse,

broadband random, and pseudo-random. Transfer functions, auto spectra and coherence functions were acquired

for the pseudo-random excitation. Time histories were acquired for the pulse and broadband random input to the

shaker. The tests were repeated with a reflective surface installed. Binary data files were converted to universal

format and archived on compact disk.

14. SUBJECT TERMS

Acoustics; Binaural Simulation; Structural Acoustics

15. NUMBER OF PAGES

23

 16. PRICE CODE

A03

17. SECURITY CLASSIFICATION

OF REPORT

Unclassified

18. SECURITY CLASSIFICATION

OF THIS PAGE

Unclassified

19. SECURITY CLASSIFICATION

 OF ABSTRACT

Unclassified

20. LIMITATION

 OF ABSTRACT

 UL

NSN 7540-01-280-5500 Standard Form 298 (Rev. 2-89)

Prescribed by ANSI Std. Z-39-18

298-102