CELEX: 51981PC0811
Language: en
Date: 1982-01-06
Title: PROPOSAL FOR A COUNCIL DIRECTIVE CONCERNING AIRBORNE NOISE EMMITTED BY HOUSEHOLD APPLIANCES

19. 7. 82                           Official Journal of the European Communities                           No C 181/1
                                                             II
                                                    (Preparatory Acts)
                                               COMMISSION
              Proposal for a Council Directive concerning airborne noise emitted by household appli-
                                                           ances
                           (Submitted by the Commission to the Council on 12 January 1982)
THE COUNCIL OF THE EUROPEAN                                      ing manufacturers to take steps to reduce the noise
COMMUNITIES,                                                     emitted by the household appliances which they
                                                                 manufacture;
Having regard to the Treaty establishing the Euro-
pean Economic Community, and in particular
Article 100 thereof,                                             Whereas, for practical reasons and to avoid a mul-
                                                                 tiplicity of labels on household appliances, the
Having regard to the proposal from the Commis-                   information on the noise level should be included
sion,                                                            on the label provided for by the implementing
                                                                 Directives adopted pursuant to Council Directive
Having regard to the opinion of the European                     79/530/EEC of 14 May 1979 on the indication by
Parliament,                                                      labelling of the energy consumption of household
                                                                 appliances (4) where the same family of household
Having regard to the opinion of the Economic and                 appliances is the subject-matter of the latter and of
Social Committe,                                                 an implementing Directive adopted pursuant to this
                                                                 Directive;
Whereas the European Communities action pro-
grammes on the environment of 1973 (!) and
1977 (2) reveal the extent of the noise problem and,             Whereas the noise emitted by each 'family' of
in particular, the need for action concerning sources            household appliances must be measured and con-
of noise;                                                        trolled in each Member State by means of harmon-
                                                                 ized measuring methods, in order to eliminate tech-
Whereas the preliminary programme of the Euro-                   nical barriers to trade in respect to household appli-
                                                                 ances;
pean Communities for a consumer protection and
information policy of 14 April 1975 (3) provides for
the formulation and harmonization of rules for
labelling as one of its priority measures;                       Whereas technical progress requires rapid adapta-
                                                                tion of the technical specifications laid down by this
Whereas the public should be informed in a manner                Directive; whereas,»to facilitate implementation of
which is as comprehensible and as uniform as possi-             the measures thereby required, provision should be
ble of the level of noise emitted by household appli-            made for a procedure establishing close cooperation
ances; whereas, accurate, relevant and comparable                between the Member States and the Commission
information may guide the public's choice towards                within the Committee on the Adaptation to Tech-
less noisy household appliances, thereby encourag-               nical Progress of the methods for measuring the
                                                                 noise of household appliances and the related con-
                                                                 trol methods,
(>)   OJ No C 112, 20. 12. 1973, p. 3.
(2) OJ No C 139, 13. 6. 1977, p. 3.
(J) OJNoC92, 25. 4. 1975, p. 2.                                   (4) OJ No L 145, 13. 6. 1979, p. I.
 ---pagebreak---   NoC 181/2                         Official Journal of the European Communities                             19.7.82
  HAS ADOPTED THIS DIRECTIVE:                                                         Article 3
                                                                1. Information on the noise level of a household
                                                               appliance shall be provided and its accuracy
                          Article 1                            vouched for by the manufacturer or — where the
                                                               manufacturer is established outside the Community
  1. The purpose of this Directive is to harmonize             — by the importer established within the Com-
  the laws, regulations and administrative provisions          munity.
  of the Member States relating to:
                                                               2. The noise levels of each family of household
  — the methods of measuring the noise emitted by              appliance shall be provided in accordance with the
        household appliances,                                  conditions for acoustic measurement set out in
  — the arrangements for checking published infor-             Annex I and in the implementing Directive relating
        mation on noise levels,                                to that family.
 — the general principle regarding the publication             3. The checking of the noise levels published for a
        of information on the noise emitted by house-          family of household appliances shall be undertaken
        hold appliances.                                       in accordance with the general rules given in
                                                               Annex II and with the rules laid down in the imple-
                                                               menting Directive relating to that family.
 2. Appliances which form an integral part of the
 dwelling and which can no longer perform the func-
 tion for which they are intended when removed
 from it shall not come within the scope of this
 Directive.
                                                                                      Article 4
                                                              The Member States, including those which do not
                                                              make publication mandatory, shall take every
                                                              appropriate step to ensure that publication of infor-
                          Article 2                           mation concerning the noise level of household
                                                              appliances complies with the provisions of this
 For the purposes of this Directive:                           Directive and with those of the relevant implement-
                                                              ing Directive.
 (a) 'household appliance' means any machine, por-
       tion of a machine or installation manufactured
       principally for use in dwellings, including cel-
       lars, garages and other outbuildings, in partic-
       ular household appliances for upkeep, cleaning
       purposes, preparation and storage of foodstuffs,
       production and distribution of heat and cold,                                  Article 5
       air conditioning, and other appliances used for
       non-professional purposes;                              1. The form of publication of information on the
                                                               noise level of appliances, determined in accordance
 (b) 'family' of household appliances means all               with Article 3, shall be laid down for each family of
      models (or types) of the various household              household appliances in Directives adopted in
      appliances designed for the same purpose and             implementation of this Directive.
      powered by the same principal energy source.
      Generally, a family includes several models (or         2. Member States may require all manufacturers or
      types);                                                 importers marketing on their territory household
                                                              appliances which belong to a family covered by an
(c) 'series' of household appliances means all                implementing Directive to publish the noise level of
      household appliances belonging to the same              such appliances.
      model (or type), which have refined characteris-
      tics and which are produced by the same manu-
      facturer;                                               3. Where, for the same family of household appli-
                                                              ances, a label relating to energy consumption is
(d) 'batch' of household appliances means a speci-            provided for pusuant to an implementing Directive
      fied quantity of a given series manufactured or         adopted under Council Directive 79/530/EEC, the
      produced under uniform conditions;                      information on the noise level shall be given on this
                                                              label in the space provided for this purpose. The
(e) 'noise level' means the sound power level of the          label relating to the noise level shall provide, where
      household appliances expressed in A-weighted            necessary, a space for information relating to energy
      decibels (dB), reference 1 pW.                          consumption.
 ---pagebreak--- 19.7.82                            Official Journal of the European Communities                           N o C 181/3
4. Where the affixing of a label is provided for by           ance be suspended pending the issue of accurate
an implementing Directive, the manufacturer or the            information by the manufacturer or importer.
importer shall supply the labels showing the noise
level for each of his household appliances the fam-
ily of which is covered by an implementing Direc-
tive. The labels, shall be supplied by the manufac-                                   Article 8
turer or, where appropriate, the importer, shall be
affixed by the trader to the corresponding appli-             The implementing Directives shall lay down for
ances whenever these are displayed for sale. The              each family of household appliances:
label shall be affixed at the place stipulated by the
implementing Directive or, if no instructions are             — the form in which information on noise levels
given, where it is most visible.                                   shall be made public,
                                                              — the conditions under which noise emissions
                                                                   shall be measured,
5. Where an implementing Directive provides for
publication of the noise level in some other form,            — the procedures for checking the published lev-
for example in the instruction manual or on the                    els.
guarantee certificate, the manufacturer or the
importer shall supply the appropriate document. In
such a case the trader shall see to it that this docu-
ment is available at the place of sale, display or hire.
                                                                                       Article 9
                                                              Any amendments which are necessary in order to
                                                              adapt the Annexes to this Directive to technical pro-
                         Article 6                            gress shall be adopted in accordance with the proce-
                                                              dure laid down in Article 11.
 1. The Member States may not refuse, prohibit or
restrict the marketing of household appliances on
grounds relating to information on the noise level of
such appliances where the requirements of this                                        Article 10
Directive and of the relevant implementing Direc-
tive have been fulfilled.
                                                               1. A Committee on the Adaptation to Technical
                                                               Progress of the Directives on the Removal of Tech-
                                                               nical Barriers to Trade in the sector of household
2. Without prejudice to the outcome of any checks              appliances (hereinafter, called 'the Committee') is
which may be carried out once the household appli-             hereby set up; it shall consist of representatives of
ances have been offered for sale, the Member States            the Member States with a representative of the
shall regard the publication of information on the             Commission as chairman.
noise level in the form prescribed by a given imple-
menting Directive as sufficient proof that the house-          2. The Committee shall adopt its own rules of pro-
hold appliance complies with the provisions of this            cedure.
Directive and the relevant implementing Directive.
                                                                                       Article 11
                         Article 7
                                                               1. Where the procedure laid down in this Article is
                                                               to be followed, the matter shall be referred to the
 1. The accuracy of the information on the noise               Committee by its chairman, either on his own initia-
 level of household appliances of a family covered
                                                               tive or at the request of the representative of a Mem-
by an implementing Directive shall be checked by
                                                               ber State.
the Member States or by bodies approved for this
 purpose by the Member States. Where appropriate,
the Member States shall notify the Commission and              2. The representative of the Commission shall sub-
 the other Member States of the name of the                    mit to the Committee a draft of the measures to be
 approved bodies.                                              adopted. The Committee shall deliver its opinion on
                                                               the draft within a period set by the chairman having
                                                               regard to the urgency of the matter. Opinions shall
                                                               be delivered by a majority of 45 votes, the votes of
 2. If, following a check, it is found that the 'noise         Member States being weighted as provided in
 level' is higher than the published level, the Member         Article 148 (2) of the Treaty. The chairman shall not
 States may request that the marketing of the appli-           vote.
 ---pagebreak--- NoC 181/4                      Official Journal of the European Communities                           19.7.82
3. (a) The Commission shall adopt the measures                                   Article 12
       envisaged where they are in accordance
       with the opinion of the Committee.                 1. The Member States shall bring into force the
                                                          laws, regulations and administrative provisions
   (b) Where the measures envisaged are not in            necessary to comply with this Directive on 1 Janu-
       accordance with the opinion of the Com-            ary 1983. They shall forthwith inform the Commis-
       mittee, or if no opinion is delivered, the         sion thereof.
       Commission shall without delay submit to
       the Council a proposal on the measures to          2. The Member States shall communicate to the
       be adopted. The Council shall act by a qual-       Commission any measures taken in the field cov-
       ified majority.                                    ered by this Directive.
   (c) If, within three months of the proposal
       being submitted to it, the Council has not                                Article 13
       acted, the proposed measures shall be
       adopted by the Commission.                         This Directive is addressed to the Member States.
                                                                           r
 ---pagebreak--- 19.7.82                            Official Journal of the European Communities                                 N o C 181/5
                                                        ANNEX I
         METHOD OF DETERMINING AIRBORNE NOISE EMITTED BY HOUSEHOLD APPLIANCES
      1.     OBJECT AND FIELD OF APPLICATION
      1.1.   Object
             The purpose of this method is to determine the noise emitted by all types of household appliances
             (including their accessories or components), whether supplied from mains or from batteries or from
             any other energy source.
             This method defines the various acoustic criteria which may be adopted to characterize a household
             and the means of determining these criteria.
             The values obtained by this method constitute the basic data for checking the accuracy of their noise
             emission with the declared values. Unless otherwise indicated, these values are inclusive of toler-
             ances.
             This method is applicable unless separate Directives lay down different or supplementary provisions
             taking into account the special characteristics of certain types of household appliances.
      1.2.    Field of application
             This Annex is concerned with objective methods of engineering accuracy (engineering method (grade
              2) according to the ISO Standard 2204, first edition of 1 May 1973) for determining should power
              levels Lw, expressed in decibels (dB) with reference to a sound power of 1 picowatt (1 pW), of air-
              borne acoustical noise within the specified frequency range of interest, including the octave bands
              between 125 and 8 000 hertz (Hz) (this interval being for practical reasons narrower than the fre-
              quency range of audible sound), and for prescribed operating conditions of the appliance to be meas-
              ured.
              The following sound power levels are used:
             — A-weighted sound power level, LWA, and
             — octave band sound power levels, LWOCf
             In general the described methods are specified for appliances operated with no operator present.
             Only for the (rare) cases where an appliance can only be operated by an operator or must be fed by
             an operator, a standard test operator shall be present.
              Notes
             (a) The uncertainties of measurements according to this method tend to result for A-weighted sound
                   power levels in standard deviations generally not exceeding approximately 2 dB, provided that
                   the noise spectrum does not contain pronounced discrete frequencies; if it does, the magnitude
                   of the uncertainties will be larger and no general rules for the magnitude of the uncertainties can
                   be given. The mentioned standard deviations reflect the cumulative effects of all causes of meas-
                   urement uncertainties, excluding variations in the noise level of the appliance from test to test.
             (b) The noise values obtained under the described conditions of this method will not necessarily
                   correspond with the noise experienced under the operational conditions of practical use.
 ---pagebreak--- N o C 181/6                     Official Journal of the European Communities                                    19.7.82
      3.    DEFINITIONS AND TERMS
      3.1.  Definitions and terms pertinent to determination of sound power levels
            These may be found in ISO Standard 3743, first edition, 15 December 1976 'Acoustics — Determina-
            tion of sound power levels of noise sources — Engineering methods for special reverberation test
            rooms', and in ISO/DIS 3744-2 submitted on 24 February 1977 'Acoustics — Determination of
            sound power levels of noise sources — Engineering methods for free-field conditions over a reflect-
            ing plane'.
      3.2.  Comparison method
            That method in which the sound power level is calculated by comparing the measured sound pres-
            sure levels produced by the source to be tested with the sound pressure levels produced by a refer-
            ence sound source (RSS) in the same test environment and as far as possible in the same location and
            position.
      3.3.  Direct method
            That method in which the sound power level is calculated from the measured sound pressure levels
            produced by the source to be tested, which:
            — in free-field conditions are averaged on the measured surface and in time and from the area of
                 the measurement surface,
            — in reverberant field conditions are averaged in space and time and from the volume and the re-
                 verberation time or the total absorption of the test room.
            Note
            The separate Directives specify the method to be applied to a given family.
     3.4.   Period of observation
            The time interval during which acoustical data are obtained. The period of observation is specified
            depending upon the characteristics of the noise being measured, upon the required accuracy of the
            measurements and upon the characteristics of the instrumentation.
     3.5.   Period (of operation)
            A time interval during which a specified process is accomplished by the appliance to be tested.
      3.6.  Operational cycle
            A sequence of periods occuring in the appliance during normal use.
     3.7.   Time history
            A continuous recording of the sound pressure level (for a distinct microphone position) as a function
            of time as obtained during one or more periods of an operational cycle.
     3.8.   Standard test operator
            A person necessary for operating or feeding the appliance to be tested, not wearing abnormally
            sound absorptive clothing which might influence sound measurements.
      3.9.  Center of location or position, of a source (appliance)
            The term-used for describing the location or position of the appliance to be tested within the test
            environment and with respect to the coordinate system of microphone positions.
 ---pagebreak--- 19.7.82                              Official Journal of the European Communities                            N o C 181/7
              The center of location coincides:
              — the center of a parallelepiped drawn around the main part of hand-held, suspended or stand-
                   type appliances,
              — with the center of a rectangle drawn around the projection of the main part of the appliance on
                    the floor for floor-supported appliances and on the wall for wall-mounted appliances.
      4.      MEASUREMENT METHODS AND ACOUSTICAL ENVIRONMENTS
     4.1.     Direct method
              The direct method can be used only for measurements in qualified test environments according to
              ISO/DIS 3744.2 submitted on 24 February 1977 for essentially free-field conditions over a reflecting
              plane and according to ISO Standard 3743, first edition, 15 December 1976 for special reverberation
              rooms.
              With this method the sound power level is determined:
              — in free-field conditions from the time-averaged sound pressure levels, measured on the measure-
                    ment surface and the area of the measurement surface,
              — in reverberant field conditions from the space and time-averaged sound pressure levels and the
                    equivalent sound absorption of the test room (or from the reverberation time and the volume of
                    the test room).
      4.2.    Comparison method
              The comparison method for measurements in a special reverberation test room described in ISO
              3743, first edition, 15 December 1976 section 8.3. The term 'comparison method' is not explicitly
              given in ISO/DIS 3744.2 submitted on 24 February 1977 for measurements is essentially free-field
              conditions but when applying the 'absolute comparison tests' for the determination of the environ-
              mental correction given in clause 8.3. of ISO/DIS 3744.2 submitted on 24 February 1977, by using a
               reference sound source, the procedure is in fact a comparison method.
               With this method the sound power level (A-weighted, and octave bands, if required) is determined by
               comparing the mean-square band sound pressure levels produced by the appliance under test with
               the mean-square band sound pressure levels produced in the same acoustical environment by a sta-
               ble, thoroughly calibrated reference sound source (RSS) of known sound power output, complying
               with the requirements of ISO 3741, first edition, 15 July 1975 or ISO/DIS 6926 respectively.
               Note
               The accuracy depends essentially on the calibration of the RSS which shall be performed in an
               appropriately equipped laboratory.
       4.3.    Acoustical environments
       4.3.1.   Essentially free-field conditions over reflecting planes
               General requirements are given in clause 4 of ISO/DIS 3744.2 submitted on 24 February 1977.
                For measurements to be carried out according to the direct method, and for measurements according
               to the comparison method if the A-weighted sound power level is to be determined directly from
               A-weighted sound pressure levels the test environment shall be qualified by the procedure specified
               in ISO/DIS 3744.2 submitted on 24 February 1977.
       4.3.2.   Special reverberation rooms
               The test room requirements are given in clause 4 of ISO Standard 3743, first edition, 15 December
                1976.
 ---pagebreak--- No C 181/8                       Official Journal of the European Communities                                     19. 7. 82
     5.      INSTRUMENTATION
     5.1.   Instrumentation for measuring acoustical data
            Requirements are given in clauses 5 of ISO standard 3743 first edition, 15 December 1976 and ISO/
            DIS 3744.2 submitted on 24 February 1977 respectively.
             Notes
             1.   For measurements in essentially free-field conditions, the microphone(s) shall be orientated with
                 respect to the source in accordance with the angle of incidence as specified by the manufacturer
                 for calibration. (The angle of incidence is the angle between the direction of propagation of
                 sound waves and the longitudinal axis of the microphone).
            2.    For measurements in reverberant-field conditions, the microphone(s) shall be designed for ran-
                 domly incident sound.
            3.    If the microphone(s) may be influenced (especially at low frequencies) by a moving air stream
                 (with velocities exceeding approximately 2 m/s) generated for example, by the appliance under
                 test (fan heater, etc.) suitable wind-screens shall be applied for the microphone(s) and necessary
                 corrections for changes in microphone sensitivity shall be added to the observed sound pressure
                 levels.
            Reference sound sources RSS shall have characteristics and shall be calibrated as specified in ISO
            standard 3741, first edition, 15 July 1975 or ISO/DIS 6926 respectively.
     5.2.   Instrumentation for measuring climatic conditions
     5.2.1. The temperature shall be determined with instruments having an accuracy of ± 1 °C.
     5.2.2. The relative humidity shall be determined with instruments having an absolute accuracy of ± 2 %.
     5.3.   Instrumentation for measuring operating conditions of appliances
     5.3.1. The voltage at the plug of the cable or cord of mains powered appliances shall be measured with
            voltmeters having an accuracy of class 1 instruments if the tolerance for the voltage is specified with
             ± 2 %, and shall be measured with voltmeters having an accuracy of class 0-5 instruments if the toler-
            ance for the supply voltage is specified with ± 1 %.
     5.3.2. The voltage at the battery terminals of battery powered appliances shall be measured with voltmeters
            having an accuracy of class 1 instruments.
     5.3.3. The rotational speed of motors, attachments, etc. shall be measured, if necessary, with speed indica-
            tors having an accuracy of ± 1 % of full scale.
    6.      OPERATION AND LOCATION OF APPLIANCES UNDER TEST
    6.1.    Equipping and preconditioning of appliances
    6.1.1.  The appliance shall be equipped with attachments, accesories, etc. as delivered or specified by the
            manufacturer for the intended use or function.
    6.1.2.  Care shall be taken to ensure that any auxiliary equipment, for example, electrical conduits or cables,
            piping for water supply or drainage, air ducts, etc., necessary for the operation of the appliance, do
            not radiate significant amounts of sound energy into the test environment or change the sound out-
            put of the appliance.
    6.1.3.  Prior to noise measurements the appliance, equipped as for the intended use, shall have been in oper-
            ation for a total period of at least two hours for running-in at the highest speed setting, if any, and
            without load.
 ---pagebreak--- 19.7.82                           Official Journal of the European Communities                                  N o C 181/9
     6.1.4.  Immediately before each series of noise measurements, the appliance equipped as for the intended
             use, shall be operated 10 minutes for stabilizing at the highest speed setting, if any, without load.
             Note
             Care should be taken to avoid possible overheating of appliances for short-time or intermittent use.
             Rated operating times have to be taken into account.
     6.2.   Supply of electric energy and of water or gas
     6.2.1.  Appliances with mains powered electric motor(s) shall be supplied with rated voltage with a toler-
             ance of ± 2 %, except for commutator motors for which the tolerance shall be ± 1 %, and if appli-
             cable with rated frequency. Appliances designed for d.c. only shall be supplied with d.c. Appliances
             not marked with rated frequency shall be supplied either with 50 Hz or with 60 Hz, as common in the
             country of use.
             Appliances designed for a voltage range shall be supplied with the mean voltage of the range and the
             same tolerances as specified before, if the difference between the limits of the range does not exceed
             10 % of the mean voltage of the range. If the difference exceeds 10 % the appliance shall be supplied
             with the highest voltage of the range and the same tolerances as specified before.
            The supply voltage shall be measured at the plug of a non-detachable cable or cord, or at the appli-
            ance inlet if a detachable cable is provided, but in no case at the entrance of extension cables or
            cords.
     6.2.2. Appliances with battery powered electric motor(s) shall be started for noise measurements with full-
            charged batteries as specified by the manufacturer and the measurements shall be interrupted when
            the battery voltage under load has dropped for lead-acid batteries to 0-9 times and for other batteries
            to 0-8 times the battery voltage under load at the beginning of the test.
            The battery voltage shall be measured at the battery terminals.
     6.2.3. Appliances incorporating heating, either electric or gas, shall be operated without heating if the heat-
            ing does not add significant amounts to the noise emission of the appliance.
     6.2.4. The water and/or gas supply, if any, shall be as specified by the manufacturer.
            Appliances designed for a pressure range shall be supplied with the highest pressure of the range.
            Appliances designed for cold and hot water supply shall be supplied with cold water, if they are
            intended to function with cold water.
     6.3.    Climatic conditions
             In general household appliances (if not otherwise specified for a special category) shall be operated
             under the following climatic conditions:
             — temperature                           t    = 15 — 30 °C,
             — relative humidity                     RH = 30-70%,
             — atmospheric pressure                  ps   = 860 — 1 060 mbar.
     6.4.    Loading and operating of appliances
     6.4.1.  In general the loading and operating conditions should as far as practicable simulate normal use but
            in every case preference has to given to simple conditions providing a satisfactory repeatibility and
            reproductibility. Furthermore the presence of an operator should be avoided if even possible. An
            operator shall be present only if the application of the load, for example periodical feeding with
            foodstuff, is not practicable without an operator.
 ---pagebreak--- No C 181/10                       Official Journal of the European Communities                                   19. 7. 82
     6.4.2. For determining noise emission of an appliance, the loading and operating conditions, if not speci-
            fied in the special directives, shall be restricted to one single condition, except for appliances with
            multiple important main functions of longer duration (for example, automatic washing machines
            with the functions: washing, spin-drying, tumble-drying), where for each of the main functions one
            separate condition has to be specified, and for multipurpose appliances provided with special attach-
            ments or tools for several functions (e.g. kitchen machines for mixing, blending, slicing, etc.) where
            one single condition has to be specified, based on the function with the longest duration in practical
            use.
            The idling (no-load) condition may be chosen as the sole condition for determining noise emission of
            an appliance if it is typical and steady.
            For appliances provided with speed control in general the highest speed setting shall be used.
     6.4.3. Appliances operated during normal use in operational cycles shall be operated likewise for determin-
            ing noise emission, taking measurements during appropriate parts of the operational cycles of the
            main function(s) and reporting for appliances with automatic programme control the duration of the
            operational cycle(s) of the main function(s).
            Note
            It is recommended to apply a graphic level recorder to make a recording of the A-weighted sound
            pressure level during the operational cycle(s) — time-history — at one of the microphone positions,
            preferably in front of the appliance to be tested.
     6.4.4. When applying loading and operating conditions for noise measurements care shall be taken to
            avoid possible overheating of the appliance under test. Rated operating and resting times and/or
            manufacturer's instructions shall be followed.
     6.5.   Location and mounting of appliances
     6.5.1. Counter-top or table-type appliances, and floor-mount appliances for placing on the floor shall be
            placed in normal position directly, without any resilient means other than those incorporated in the
            appliance,
            either:           on the floor of the reverberation test room with a minimum distance of 1 m between
                              any surface (including protuding parts) of the appliance and the nearest wall,
            or:               on the reflecting plane of the essentially-free-field environment, giving considera-
                              tion to the shape and size of the specified measurement surface.
     6.5.2. Hand-held appliances, including their accessories, if any, shall in normal position at a height of
            approximately 25 cm be resiliently suspended or resiliency mounted in appropriate test fixtures, the
            base of the fixture being placed with intermediate means of resilient material with a thickness of
            approximately 1 cm, so that structure-borne noise is not transmitted from the appliance, (see
            figure 8),
            either:            on the floor of the reverberation test room with a minimum distance of 1 m between
                               any surface of the appliance or of the test fixture and the nearest wall,
            or:                on the reflecting plane of the essentially-free-field environment, giving considera-
                               tion to the shape and size of the specified measurement surface.
             Note
             Care shall be taken to ensure that the means of suspension or clamping do not change the sound
             output of the appliance, e.g. by suppressing or emphasizing special modes of vibration of the body of
             the appliance or by covering radiating surfaces, air intakes, etc.
 ---pagebreak--- 19.7.82                            Official Journal of the European Communities                                 N o C 181/11
      6.5.3. Floor-mount appliances, including cabinets or counters for built-in appliances, for placing on the
             floor against a wall, shall be placed in normal position with a distance of approximately 5 cm
             between the back of the appliance and a vertical wall or plane, taking care to avoid contact of pro-
             truding parts with the wall or plane, directly, without any resilient means other than those incorpor-
             ated in the appliance,
             either:            on the floor of the reverberation test room with the mentioned distance of 5 cm of
                                the back from a wall and with a minimum distance of 1 m between any other sur-
                                face of the appliance or of the cabinet or the counter from the nearest corner of the
                                room,
             or:                on the reflecting plane of the essentially-free-field environment and with the men-
                                tioned distance of 5 cm between the back of the appliance and the second vertical
                                reflecting plane (see subclause 4.3.4), giving consideration to the shape and size of
                                the specified measurement surface.
     6.5.4.  Wall-mount appliances, including their accessories, if any, shall be fastened or held by an appro-
             priate fixture in close contact, without any resilient means other than those incorporated in the appli-
             ance, at a height of the lowest edge of approximately 1 • 3 m from the floor,
             either:            on a wall of the reverberation test room with a minimum distance of 1 m of any
                                surface of the appliance from the nearest corner of the room,
             or:                on the second, vertical reflecting plane of the essentially-free-field environment, giv-
                                ing consideration to the shape and size of the specified measurement surface.
     6.5.5.  Appliances for building in, shall be built-in according to the manufacturer's instructions in appro-
             priate cabinets or counters and shall be located as specified for appliances for placing on a floor
             against a wall with an absorption coefficient less than 0 • 6.
     6.5.6.  Stand-type appliances, i.e. appliances designed for use on a stand, for example, hairdrying hoods,
             shall be placed on the stand supplied with the appliance or on a stand constructed according to the
             manufacturer's instructions and shall be located for floor-mounted appliances.
     6.5.7.  Floor-treatment appliances shall be placed on a piece of specified floor covering, representing prac-
             tical application, having the smallest dimensions, necessary for placing the appliance in use, and
             shall be located together with the floor covering as specified for floor-mount appliances. If necessary
             the appliance shall be prevented from self-propelling by resilient means. Handles shall be held in
             normal position by resilient means.
             Notes
              1.   Sound radiation due to possible vibrations of the piece of floor covering shall be prevented.
             2.    The piece of floor covering is considered to be a part of the appliance to be tested, and its possi-
                   ble influence on the acoustical characteristics of the test environment, for example, of the hard
                   reflecting plane or of the absorption (reverberation time) of reverberation test rooms shall not be
                   taken into account.
      7.     MEASUREMENT OF NOISE LEVELS
      7.1.   Microphone array and measurement surface for essentially free-field conditions
      7.1.1. For floor-mount free standing appliances, including built-in appliances, of larger size, the measure-
             ment surface shall be a rectangular parallelepiped with nine microphone positions as specified in
             figure 1, centered in the projection of the geometrical center of the reference box on the horizontal
             reflecting plane (floor), the coordinate system describing the microphone positions being located
             with the x, y-axis in the horizontal reflecting plane and the z-axis at right angles to it, and the x-axis
             in the longitudinal vertical plane of the reference box, the front of the appliance being directed in the
             direction of the x-axis.
             This measurement surface can be used also for wall-mount appliances. In this case the x, y-axes are
             located in the vertical reflecting plane, with the x-axis directed vertically upwards and the front of the
             appliance being directed in the direction of the z-axis.
 ---pagebreak--- N o C 181/12                       Official Journal of the European Communities                                         19.7.82
              The area of this measurement surface is given by S = 2 (2bc + 2ac + 2ab).
              Note
              For determining time histories, frequency spectra, etc., of the emitted noise, the microphone position
              No 1 is recommended.
      7.1.2.  For floor-mount of counter-type appliances for placing against a wall, including built-in appliances,
              of larger size, the measurement surface shall be a rectangular parallelepiped with six microphone
              positions as specified in figure 2, with the x-axis in the horizontal reflecting plane at right angles to
             the vertical reflecting plane, the front of the appliance being directed in the direction of the x-axis.
             The area of this measurement surface is given by S = 2 (2ac + 2ab + be).
              Note
              For determining time histories, frequency spectra, etc., of the emitted noise, the microphone position
              No 1 is recommended.
     7.1.3.  For floor-mount cabinet-type appliances for placing against a wall, including built-in appliances, of
             larger size, with a height exceeding 1 • 6 m, the measurement surface shall be a rectangular parallele-
             piped with seven microphone positions as specified in figure 3, with the x-axis in the horizontal
             reflecting plane at right angles to the vertical reflecting plane, the front of the appliance being
             directed in the direction of the x-axis.
             The area of this measurement surface is given by S = 2 (2ac 4- be).
             Note
             For determining time histories, frequency spectra, etc., of the emitted noise, the microphone position
             No 3 is recommended.
     7.1.4.  For the parallelepiped measurement surfaces according to subclauses 7.1.1, 7.1.2 and 7.1.3, the meas-
             urement distance, d, between the reference box and the measurement surface shall be d = 1 0 m.
             The reference box is the smallest rectangular parallelepiped with the dimensions 1,, 12,13, just enclos-
             ing the appliance (parts which are unlijkely major radiators of noise are disregarded) and terminating
             on the reflecting plane(s). The dimension 1,, is parallel to the x-axis, the dimension 12 is parallel to the
             y-axis and the dimension 13 is parallel to the z-axis.
     7.1.5.  For counter-top or table-type appliances, floor treatment appliances and hand-held appliances
             (mounted in test fixtures), placed during measurements on the horizontal reflecting plane, with the
             dimensions of the reference box 1,, 12,13 each not exceeding 0-7 m the measurement surface shall be a
             hemisphere with 10 microphone positions as specified in figure 4, centered in the projection of the
             geometrical center of the reference box on the horizontal reflecting plane (floor), the coordinate sys-
             tem describing the microphone positions being located with the x, y-axis in the horizontal reflecting
             plane and the z-axis perpendicular to it, and the x-axis in the longitudinal vertical plane of the refer-
             ence box, the front of the appliance being directed in the direction of the x-axis.
             This measurement surface can be used also for small wall-mount appliances, in this case the x, y-axes
             are located in the vertical reflecting plane with the x-axis directed upwards and the front of the appli-
             ance being directed in the direction of the z-axis.
             The area of this measurement surface is given by S = 2riR2.
             The radius of the hemisphere shall be R = 1 -5 m.
             Note
             For determining time histories, frequency spectra, etc., of the emitted noise, the microphone position
             No 8 is recommended.
 ---pagebreak--- 19.7.82                            Official Journal of the European Communities                                N o C 181/13
     7.1.6.   For counter-top of table-type appliances and hand-held appliances (mounted in test fixtures), placed
              during measurement on the horizontal reflecting plane, with the dimensions of the reference box, 1,
              and 12 each not exceeding 0-5 m and 13 not exceeding 0-4 m, the measurement surface shall be a
              hemisphere with seven microphone positions as specified in figure 5, centered in the projection of the
              geometrical center of the reference box on the horizontal reflecting plane (floor), the coordinate sys-
              tem describing the microphone positions being located with the x, y-axis in the horizontal reflecting
              plane and the z-axis perpendicular to it, and the x-axis in the longitudinal vertical plane of the refer-
              ence box, the front of the appliance being directed in the direction of the x-axis.
              The area of this measurement surface is given by S = 2I1R2.
              The radius of the hemisphere shall be R = 1 0 m.
              Note
              For determining time histories, frequency spectra, etc., of the emitted noise, the microphone position
              No 4 is recommended.
     7.1.7.   For small floor-mount appliances for placing against a wall (for example, shoe-polishers), with the
              dimensions of the reference box, 1| and 13 not exceeding each 0-4 m and 12 not exceeding 0- 8 m, the
              measurement surface shall be a quarter-sphere with five microphone positions as specified in
              figure 6, centered in the edge formed by the horizontal and the vertical reflecting planes, the coordi-
              nate system describing the microphone positions being located with the x, y-axes in the horizontal
             reflecting plane and the z-axis in the vertical reflecting plane and the x-axis at right angles to the
              vertical reflecting plane.
             The area of this measurement surface is given by S = FIR2.
             The radius of the quarter-sphere shall be R = 1 • 5 m.
              Note
              For determining time histories, frequency spectra, etc., of the emitted noise, the microphone position
              No 2 is recommended.
     7.1.8.   For stand-type appliances, with the dimensions of the reference box, 1,, 12, 13, each not exceeding
             0-4 m and with the height of the geometric center of the reference box above the floor exceeding in
             normal use 1 0 m, the measurement surface shall be a sphere with eight microphone positions as
             specified in figure 7, centered in the center of the reference located with the z-axis vertically and the
              x-axis being directed in the direction of the front of the appliance.
             The area of this surface is given by S = 4 11R2.
             The radius of the sphere shall be R = 1 0 m.
              Notes
              1.   The distance between the lowest microphone position and the horizontal reflecting plane shall
                   be at least 0-3 m.
             2.    For determining time histories, frequency spectra, etc., of the emitted noise, the microphone pos-
                   ition No 2 is recommended.
     7.1.9.  The measurement surface shall be distant from the inner boundaries of test environments, except
              from the reflecting plane(s),
             — for qualified free-field conditions: at least 0 • 7 m,
             — for unqualified free-field conditions: at least 1 0 m.
     7.1.10. The measurement may be carried out by taking readings from a single microphone which is moved in
             steps into the specified positions, or by sampling the outputs of an adequate number of microphones
             located in the specified positions. For spherical measurement surfaces it may also be beneficial to
 ---pagebreak--- N o C 181/14                       Official Journal of the European Communities                                        19. 7. 82
              rotate in steps round the z-axis either the appliance under test or the microphone(s) fastened to
              appropriate supports.
      7.1.11. The microphone(s) shall be orientated with respect to the source such that its axis (their axis) of
              incidence, for which it is (they are) calibrated is (are) directed towards the geometric center of the
              reference box.
      7.1.12. For appliances with symmetrical noise emission it may be sufficient to use only an adequate part of
              the specified measurement surface.
      7.1.13. For a simple comparison of appliances of the same category, type and size, for example, for quality
              control measurements during production, the number of microphone positions may be reduced, for
              example, to the single position recommended for the several arrays for determining time histories,
              frequency spectra, etc.
      7.2.    Microphone array and location of reference sound sources in essentially free-field conditions
      7.2.1.  In general the reference sound source (RSS) used for the comparison method shall be measured with
              the same microphone array and measurement surface used for the appliance to be tested.
      7.2.2.  The reference sound source shall be placed on the horizontal reflecting plane such that the projection
              of the center of its reference box coincides with the projection of the center of the reference box of
              the appliance to be tested on the horizontal reflecting plane.
      7.3.    Microphone array and source location in reverberant field conditions
      7.3.1.  In general the number of microphone positions, Nm, shall be Nm = 6 and the number of source loca-
              tions, Ns, shall be Ns = 1.
              A change of these numbers shall depend on the results of a preliminary measurement according to
              subclause 7.3.2 of the appliance under test, carried out.with the specified six microphone positions
              and one source location.
      7.3.2.  The standard deviation, SM, shall be calculated from the equation:
                                                                                  1/2
                                     SM = (n - 1) 1/2     E        {Lpi-Lpm?
              where:
              Lpi     = is the ith value of the sound pressure level in decibels, reference 20 n Pa;
              Lpm     = is the mean value of Lpl, Lp2,        Lp6, in decibels, reference 20 n Pa;
              n       = 6.
              When the range of values of L ph L p 2 ,... Lp6, is not greater than 5 dB, a simple arithmetic average may
              be used for Lpm. When the range is greater than 5 dB, the following expression shall be used:
                                 Lpm = 10 log!     - (l00lLpl       + 1 0 ° ' l L ^ + .... + 10° lL
                                                                                                    ^)
                                                   6
              Note
              The magnitude of sM will depend on the properties of the sound field in the test room. These proper-
              ties are influenced by the characteristics of the test room and of the source (i.e. its directivity and the
              frequency spectrum of the emitted noise).
      7.3.3.  If the standard deviation, sM, calculated according to subclause 7.3.2 is below 2 • 3 dB, the final meas-
              urements, shall be carried out with the same Nm = 6 microphone positions and Ns = 1 source loca-
              tion.
 ---pagebreak--- 19.7.82                            Official Journal of the European Communities                                 No C 181/15
     7.3.4.  If the standard deviation, sM, calculated according to subclause 7.3.2 is in the limits 2-3 to 4 0 dB,
             the final measurements have to be carried out with Nm = 6 microphone positions and Ns = 2 differ-
             ent separate source locations in the reverberation test room.
     7.3.5.   If the standard deviation, sM, calculated according to subclause 7.3.2 exceeds 4 dB, the appliance
              under test is not permitted to be measured in the provided reverberation test room but shall be meas-
              ured in an environment with essentially free-field conditions.
     7.3.6.   No microphone position shall be closer than 1 0 m from the surface of the source or not closer than
              1 • 5 m from the projection of the centre of the reference box on the floor or on a wall of the test room.
     7.3.7.    No microphone position shall be closer than 1 -0 m any wall, floor, ceiling or other room surface.
     7.3.8.   No microphone position shall be closer than 1 • 5 m from any other microphone position.
     7.3.9.   The microphone heights shall be different, one from another, by at least 0-2 m.
     7.3.10.  If microphone positions can be included within a plane, this plane shall not lie within 10° of a paral-
              lel to any room surface.
     7.3.11. To the extent possible, the microphone positions shall be at different distances from the source and
             shall not be symmetrically located.
     7.3.12. The microphone positions shall avoid areas of air discharge or direction of maximum radiation
             (sound beaming) from the source.
              Note
             The directivity is normally greatest along a centerline at right angles to the primary radiating surface
             or opening of the source and least along a line parallel to such surface or opening. It is recommended
             to locate a microphone position at least 45° away from the direction of maximum radiation.
     7.3.13. The measurements may be carried out by taking readings from a single microphone which in steps is
             located in the specified positions, or by sampling the outputs of an adequate number of microphones
             located in the specified positions.
     7.4.    Microphone array and location of reference sound sources in reverberant field conditions
     7.4.1.  In general the reference sound source (RSS) used for the replacement comparison method shall be
             measured with the same microphone array and with the same number of source locations as used for
             the appliance under test.
     7.4.2.  The RSS shall be located on the floor or on the wall such that the projection of the center of its
             reference box coincides with the projection of the center of the reference box of the appliance under
             test.
     7.5.    Sound pressure level measurements
     7.5.1.   In general the time-averaged mean-square sound pressure levels (in octave bands or with A-weight-
              ing) of the source(s) (appliance under test), shall be measured with a dynamic characteristic of the
              instrumentation corresponding to the requirements for the 'Slow' response of sound level meters
              according to the procedure given in ISO Standard 3743, first edition, 15 December 1976.
     7.5.2.  The measured noise levels of the source(s) shall be corrected for the influence of background noise
             levels according to the following table:
 ---pagebreak--- N o C 181/16                        Official Journal of the European Communities                                             19.7.82
                Difference between sound pressure level measured with  Corrections to be substracted from sound pressure level
                sound source operating and background sound pressure   measured with sound source operating to obtain sound
                                      level alone                                           source alone
                                          dB                                                     dB
                                         < 6                                          measurements invalid
                                             6                                                   1-0
                                             7                                                   10
                                              8                                                  10
                                             9                                                   0-5
                                            10                                                   0-5
                                         >10                                                     0-0
             If due to simple instrumentation, an observer has to be present, or due to the properties of the appli-
             ance under test (for example, a citrous fruit blender) an operator has to be present, this person (stand-
             ard test operator) shall be at least 0 • 5 m from the microphone in use, on the side away from the
             appliance under test.
             CALCULATION OF SOUND PRESSURE AND SOUND POWER LEVELS
             Calculation of mean sound pressure levels
              The mean (space-averaged) octave band pressure levels or the mean A-weighted sound pressure
              levels of the appliance under test and of the reference sound source shall be calculated from the pres-
              sure levels for each octave band of interest, or from the A-weighted sound pressure levels, measured
              for the microphone positions of the array and corrected for background noise from the equation:
                                                    Lpm (or Lp) = 10 log.      — L       l00lL/"
                                                                               n i= i
             where:
                         is the space averaged (in reverberant field conditions) octave band pressure level or
                          A-weighted sound pressure level in decibels, reference 20 u. Pa;
                         is the space-averaged (in essentially-free-field and semi-reverberant field conditions)
                         octave band pressure level or A-weighted sound pressure level in decibels, reference 20 u
                          Pa;
                         is the octave band pressure level or A-weighted sound pressure level, resulting from the ith
                         measurement in decibels, reference 20 |i Pa;
                         is the total number of measurements for a particular octave band pressure level, or
                         A-weighted sound pressure level, i.e. the number of microphone positions multiplied (in
                         reverberant field conditions) with the number of source locations.
             Calculation of sound power levels for the comparison method
             The octave band power levels or the A-weighted sound power level of the appliance under test, Lw,
             shall be calculated from the mean sound pressure levels of the appliance under test, Lpme or Lpe, and
             those of the reference sound source, determined according to subclause 8.1, and the known (cali-
             brated) octave band power levels or the known (calibrated) A-weighted sound power level of the
             reference sound source, as follows:
                                                                L w = L^ + (L Wr - Lpr)
 ---pagebreak--- 19. 7. 82                           Official Journal of the European Communities                              N o C 181/17
             where:
             Lw     = is the octave bans sound power level or the A-weighted sound power level of the appliance
                         under test, in decibels, reference 1 pW;
             Lpe    = is the space averaged octave band pressure level or the A-weighted sound pressure level of
                         the appliance under test, determined according to subclause 8.1, in decibels, reference 20 \i
                         Pa;
             LWr    = is the known (calibrated) octave band power level or the known (calibrated) A-weighted
                         sound power level of the reference sound source in decibels, reference 1 pW;
             Lpr    = is the octave band pressure level or the A-weighted sound pressure level of the reference
                         sound source, determined according to subclause 8.1, in decibels, reference 20 u. Pa.
       8.3.  Calculation of sound power levels for measurements with the direct method in qualified essentially free-
             field conditions according to ISO/DIS 3744.2 submitted on 24 February 1977
             The A-weighted sound power level of the appliance under test, Lw, shall be computed from the mean
             value of the measured sound pressure levels, Lp, determined according to subclause 8.1, and the area
             of the used measurement surface, S, from the equation:
                                                        L w = L~p + 10 logio (S/So) - K
             where:
             Lw     = is the A-weighted sound power level or the octave band of the appliance under test in deci-
                         bels, reference 1 pW;
             L^     = is the space-averaged A-weighted surface sound pressure level or the octave band, deter-
                         mined from measured sound pressure levels at the specified microphone positions accord-
                         ing to subclause 8.1 (under the symbol Lpm) in decibels, reference 20 u. Pa;
             S       = is the area of the used measurement surface in square meters;
             S       = 1 m2;
             K      = is the environmental correction of the test room, determined during the qualification, in
                         decibels, reference 1 pW.
             Note
            By using the 'absolute comparison test' (use of a reference sound source) for the determination of K
            according to Annex A.3 of ISO/DIS 3744.2 submitted on 24 February 1977 (K = Ur measured -
                                        c
            LWr = Lpr + 10 log,,,              LWr), the 'direct' method is in fact a comparison method according to
                                        S0
            the formula of clause 8.2 because by inserting K into the above formula, the equation of clause 8.2 is
            found.
       8.4.  Calculation of A-weighted sound power levels for measurements with the direct method in special rever-
            beration test rooms according to ISO standard 3743, first edition, 15 December 1976
            The A-weighted sound power level of the appliance under test, LWA, shall be computed from the
             mean value of the measured A-weighted sound pressure, levels, LpmA, determined according to sub-
             clause 8.1, and the properties of the reverberation test room the equations:
             if a qualified special reverberation test room is used:
                                                        L WA = L pmA - 10 log io - ~ + 10 log10 — - 13
             where:
             LWA    = is the A-weighted sound power level of the appliance under test in decibels, reference
                         1 pW;
             LmpA = is the space-averaged A-weighted sound pressure level, determined from measured
                         A-weighted sound pressure levels at the specified microphone positions according to sub-
                         clause 8.1 (under the symbol Lpm) in decibels, reference 20 u. Pa;
            TN      = is the nominal reverberation time of the test room in seconds, as defined in ISO standard
                         3743, first edition, 15 December 1976;
 ---pagebreak--- No C 181/18                      Official Journal of the European Communities                                 19. 7. 82
            T0      =   Is;
            V       = is the volume of the test room in cubic meters;
            Vn      =   1ml
     9.     INFORMATION TO BE RECORDED
            The following information, if applicable, shall be compiled and recorded:
     9.1.   General data
     9.1.1. Name and address of the laboratory where measurements are carried out.
     9.1.2. File number and date(s) of measurements.
     9.1.3. Name and address of company, organization or person, who ordered the measurements.
     9.1.4. Purpose of measurements.
     9.1.5. Statement of compliance with this method.
     9.2.   Description of the appliance under test
     9.2.1. Family: for example, vacuum cleaner, washing-machine, etc.
     9.2.2. Design characteristics: for example, hand-held, table-type, floor-mount.
     9.2.3. Manufacturer or dealer, trade mark.
    9.2.4.  Model or type designation (name of product).
    9.2.5.  Serial number or production date.
    9.2.6.  Rating data (name plate data): for example, voltage, input, capacity, water supply pressure, etc.
    9.2.7.  Declared noise emission.
    9.2.8.  Power source and motor data: for example, mains powered, battery powered, induction motor, com-
            mutator motor, motor speed, etc.
    9.2.9.  Supplied and/or advertised attachments and/or accessories.
    9.3.    Measurements method applied for the test
    9.3.1.  Comparison method.
    9.3.2.  Direct method.
    9.4.    Acoustical test environment
    9.4.1.  Free-field or reverberation test room.
    9.4.2.  Test room characteristics: for example, semi-anechoic laboratory room, outdoor area, ordinary room
            with or without acoustical treatment, special reverberation test room.
    9.4.3.  Room inner (free) dimensions, volume.
 ---pagebreak--- 19. 7. 82                           Official Journal of the European Communities                              N o C 181/19
       9.4.4.  Acoustical treatment of surfaces.
       9.4.5.  Room qualification, method and data.
       9.5.    Instrumentation
       9.5.1.  Instrumentation for measuring acoustical data: name, type, serial numbers, accuracy, manufacturer
               of equipment and auxiliaries, date of latest calibration.
       9.5.2.  Reference sound source with calibration data, manufacturer.
       9.5.3.  Instrumentation for measuring climatic conditions: name, type, serial number, accuracy, manufac-
               turer (if known).
       9.5.4.  Instrumentation for measuring operating conditions: name, type, serial number, accuracy, manufac-
               turer (if known).
       9.6.    Equipment and preconditioning of appliance under test
       9.6.1.  Equipment, attachments, accessories, selected for measurements.
       9.6.2.  Running-in procedure and period.
       9.6.3.  Stabilizing procedure and period.
       9.7.    Electric supply, water supply, etc.
       9.7.1.  Mains supply voltage with tolerances, a.c, d.c, frequency.
       9.7.2.  Battery type and capacity, full or partly charged.
       9.7.3.  Water supply, pressure with tolerances, hot, cold.
       9.7.4.  Other energies, supply data.
       9.8.    Climatic conditions
       9.8.1.  Temperature.
       9.8.2.  Relative humidity.
       9.8.3.  Atmospheric pressure.
       9.9.    Operation of the appliance under test
       9.9.1.  Description of the applied load(s).
       9.9.2.  Selected operation procedure(s): for example, period(s), cycle(s), speed of motor(s), position of con-
               trols, etc.
       9.9.3.  Description of period(s) or cycle(s) used for measurements.
       9.10.   Location and mounting of the appliance under test
       9.10.1. Description of the location of the appliance under test and of the reference sound source in the test
               environment: for example, distances from' floor and wall(s) (if necessary by making a sketch).
 ---pagebreak--- No C 181/20                        Official Journal of the European Communities                                  19. 7. 82
     9.10.2.  Description of the mounting of the appliance under test: for example, fixtures, building-in cabinets,
              resilient support(s), floor covering(s), etc.
     9.11.    Microphone array
     9.11.1.  Description of the array: for example, number of microphone positions, coordinate, measurement
              distance, radius of spherical measurement surface, area of measurement surface, etc.
     9.11.2.  Description of the location of the microphone array in the test environment: for example, distances
              from the environment boundaries, etc.
     9.11.3.  Microphone angle of incidence and orientation with respect to the source.
     9.11.4.  Number of microphones, transfer of a single microphone or scanning of the output from all micro-
              phones of the array, scanning procedure.
     9.11.5.  Attachments for microphones: for example, windshielding accessories with correction data, etc.
     9.12.    Measurement data
    9.12.1.  Measured sound pressure levels in octave bands and/or with A-weighting for each microphone pos-
             ition and for each of the selected load and operation conditions of the appliance under test and the
             periods or cycles used for measurements.
    9.12.2.  Measured sound pressure levels in octave bands and/or with A-weighting for each microphone posi-
             tion of the reference sound source. .
    9.12.3.  Measured sound pressure levels in octave bands and/or with A-weighting of the background noise
             before and after each series of measurements.
    9.12.4.  Applied corrections to the measured values for the appliance under test and for the reference sound
             source referring to the influence of background noise and microphone attachments (for example, for
             wind-shielding).
    9.12.5.  Determined time histories (preferably A-weighted sound pressure levels versus time) for selected load
             and operation conditions and the periods or cycles used for measurements.
    9.12.6.  Determined frequency spectra in octave bands.
    9.12.7.  Remarks on subjective impression of noise character: for example, audible discrete tone(s), impulsive
             character, temporal character, etc.
    9.13.    Calculated sound pressure and sound power levels
    10.      INFORMATION TO BE REPORTED
             Only those data recorded according to clause 9 shall be reported which are of importance for the
             purposes of the measurements. In general, the data of the following subclauses may be important.
    10.1.    General data
    10.2.    Appliance under test
    10.2.1.  Family.
    10.2.2.  Design characteristics.
    10.2.3.  Manufacturer, dealer, trade mark.
 ---pagebreak--- 19.7.82                             Official Journal of the European Communities N o C 181/21
      10.2.4. Model or type designation.
      10.2.5. Serial number, production date.
     10.2.6.  Rating data.
     10.2.7.  Declared noise emission.
     10.2.8.  Power source.
     10.2.9.  Attachments, accessories.
     10.3.    Test conditions for the appliance
     10.3.1.  Selected attachments, accessories.
     10.3.2.  Supply from mains.
     10.3.3.  Supply from batteries.
     10.3.4.  Water supply.
     10.3.5.  Supply of other energy.
     10.3.6.  Temperature.
     10.3.7.  Relative humidity.
     10.3.8.  Atmospheric pressure.
     10.3.9.  Applied load.
     10.3.10. Operation procedure.
     10.3.11. Periods, cycle.
     10.3.12. Location in the test room.
     10.3.13. Mounting.
     10.4.    Acoustical data
     10.4.1.  Comparison method.
     10.4.2.  Direct method.
     10.4.3.  Reference sound source.
     10.4.4.  Test environment.
     10.4.5.  Time history of operation procedure.
     10.4.6.  Frequency spectra.
     10.4.7.  Remarks on subjective impression of noise.
     10.4.8.  Calculated octave band sound power levels.
     10.4.9.  Calculated sound power level(s).
 ---pagebreak--- No C 181/22                          Official Journal of the European Communities                                19.7.82
                                                           Figure 1
     Measurement surface — parallelepiped — with nine microphone positions for floor-mount free standing appli-
                                                             ances
                                                                                            Reference
                                                                                            box
     Coordinates of microphone
       sitions
       No                                          Measurement
                  X      y       z
         1        a                                surface
                         0     0-5 c
        2         0      b     0-5 c
        3      -a        0     0-5 c
        4         0    -b      0-5 c
        5         a      b       c
        6      -a        b       c
        7      —a      -b        c
        8         a    -b        c
        9         0      0       c
     Measurement surface area       S = 2(2bc +
     Note
    This measurement surface can be used also for wall-mount appliances. In this case the x, y-axes are located in
    the plane of the vertical reflecting surface with the x-axis directed vertically upwards.
                                                           Figure 2
    Measurement surface — parallelepiped — with six microphone positions for floor-mount appliances placed
                                                        against a wall
                                                                                           Reference
                                                                                           box
    Coordinates of microphone positions
      No        X       y       z
        1      2a       b     0-5 c                                                                        Measurement
       2        a       b     0-5 c                                                                    —   surface
       3        a     -b      0-5 c
       4       2a       b       c
       5       2a     -b        c
       6       a        b       c
    Measurement surface area        S = 2(2ac + 2ab + be)
 ---pagebreak--- 19.7.82                            Official Journal of the European Communities                          N o C 181/23
                                                        Figure 3
      Measurement surface — parallelepiped — with six microphone positions for high floor-mount appliances placed
                                                     against a wall
                                                                Reference
                                                                box
                                                                                                     /Measurement
      Coordinates of microphone                                                                       surface
      positions
        No       X       y      z
         1      2a        b   0-25 c
         2      2a      -b    0-25 c
         3      2a        0   0-50 c
         4       a        b   0-50 c
         5       a      -b    0-50 c
         6      2a        b   0-75 c
         7      2a      -b    0-75 c
     Measurement surface area      S = 2(2ac + be)
 ---pagebreak--- No C 181/24                       Official Journal of the European Communities                                 19. 7. 82
                                                       Figure 4
     Measurements surface — hemisphere — with ten microphone positions for hand-held, table-type and floor treat-
                                                   ment appliances
    Coordinates of microphone positions
       No     x/R     y/R     z/R
         1     0-99      0    0-15
         2   -0-50     0-56   015
         3   -0-50 -0-56      015
         4     0-45 -0-57     0-45
         5     0-45    0-57   0-45
         6   -0-89       0    0-45
         7   -0-33 -0-57      0-75
         8     0-66      0    0-75
         9   -0-33     0-57   0-75
        10       0       0    10
     Measurement surface area     S   2TTR
                                           ///////////////////////////////////////)/
 ---pagebreak--- 19. 7. 82                            Official Journal of the European Communities                         N o C 181/25
                                                          Figure 5
       Measurement surface — hemisphere — with seven microphone positions for hand-held, table-type and floor-type
                                                         appliances
       Coordinates for microphone positions
          No     x/R     y/R    z/R
           1     0-47    0-82 0-33
           2   -0-94       0    0-33
           3     0-47 -0-82 0-33
           4     0-66      0    0-75
           5   -0-33     0-57 0-75
           6   -0-33 -0-57 0-75
           7       0       0      1
       Measurement surface area      S = 2n
                                           7777777777777777777777777777777777777
 ---pagebreak--- NoC 181/26                      Official Journal of the European Communities                                  19.7.82
                                                     Figure 6
    Measurement surface — quarter sphere — with five microphone positions for small floor-type appliances placed
                                                   against wall
         Coordinates of microphone
         positions
           No      x/R    y/R     z/R
             1     0-47 -0-81 0-33
            2      0-94     0    0-33
            3      0-47   0-81 0-33
            4      0-48 -0-28 0-83
            5      0-48   0-28 0-83
         Measurement surface area         nRz
                                                             777,
 ---pagebreak--- 19. 7. 82                            Official Journal of the European Communities                           No C 181 /27
                                                          Figure 7
                   Measurement surface — sphere — with eight microphone positions for stand-type appliances
       Coordinates of microphone
       positions
          No.     x/R   y/R     z/R
           1        0      0   - 1
          2       0-89     0   -0-45
          3      -0-45   0-77 -0-45
          4      -0-45 -0-77 -0-45
          5       0-45 -0-77     0-45
          6       0-45   0-77    0-45
          7      -0-89     0     0-45
          8         0      0      1
       Measurement surface area     SS = 4TTR2
                                     777777777777777777777777777777777777777/
 ---pagebreak--- No C 181 /28         Official Journal of the European Communities  19.7. 82
                                            Figure 8
                            Test fixtures for hand-held appliances
             Rubber
             ribbons
 ---pagebreak--- 19. 7. 82                        Official Journal of the European Communities                             No C 181/29
                                                    ANNEX II
             TECHNICAL PROCEDURE FOR CHECKING THE ACCURACY OF THE INFORMA-
                             TION ON THE NOISE LEVEL OF A TYPE EXAMINED
          The conformity of the accuracy of the information on the noise level of a type examined shall, if
          possible, be verified by spot checks.