BS EN ISO 5135-1999 声学.通过混响室测定空调终端设备、空调终端装置、阻尼器和阀门噪音的声音功率级.pdf

Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI British Standard A single copy of this British Standard is licensed to leevincentpow leevincentpow on March 18, 2002 This is an uncontrolled copy. Ensure use of the most current version of this document by searching British Standards Online at bsonline.techindex.co.uk BRITISH STANDARD BS EN ISO 51351999 Acoustics Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation room The European Standard EN ISO 51351998 has the status of a British Standard ICS 17.140.20; 91.140.30 Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI BS EN ISO 51351999 This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 BSI 05-1999 ISBN 0 580 30759 X National foreword This British Standard is the English language version of EN ISO 51351998. It is identical with ISO 51351997. It supersedes BS 4773-21989 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee EH/1, Acoustics, to Subcommittee EH/1/4, Machinery noise, which has the responsibility to aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests ined; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, page ii, pages 1 to 12, an inside back cover and a back cover. This standard has been updated see copyright date and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI BS EN ISO 51351999 BSI 05-1999i Contents Page National forewordInside front cover Foreword2 Forewordii Text of ISO 51351 Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI ii blank Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 5135 December 1998 ICS 17.140.20Supersedes EN 251351991 Descriptors See ISO document English version Acoustics Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation room ISO 51351997 Acoustique Dtermination des niveaux de puissance acoustique du bruit mis par les bouches d’air, les units terminales, les registres et clapets au moyen de mesurages en salle rverbrante ISO 51351997 Akustik Bestimmung des Schalleistungspegels von Geruschen von Luftdurchlssen, Volumenstromreglern, Drossel- und Absperrelementen durch Messungen im Hallraum ISO 51351997 This European Standard was approved by CEN on 4 December 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions English, French, German. A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 51351998 E Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI EN ISO 51351998 BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 43 “Acoustics” of the International Organization for Standardization ISO has been taken over as an European Standard by Technical Committee CEN/TC 211 “Acoustics”, the secretariat of which is held by DS This European Standard replaces EN 251351991. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 1999, and conflicting national standards shall be withdrawn at the latest by June 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 51351997 has been approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA normative. Contents Page Foreword2 Introduction1 1Scope1 2Normative references1 3Definitions1 4Acoustic test facilities and procedures1 5Installation and operation of equipment to be tested2 6Auxiliary facilities3 7Measurements and calculations3 8Test report4 Annex A inative BibliographyInside back cover Annex ZA normative Normative references to international publications with their relevant European publicationsInside back cover Figure 1 Location of equipment in test room5 Figure 2 Mounting detail for air-terminal device installed on or against a surface6 Figure 3 Mounting detail for equipment installed at intersection of two surfaces7 Figure 4 Mounting detail for air-terminal device installed away from surface8 Figure 5 Mounting detail for air-terminal units installed outside room boundary9 Figure 6 Mounting detail for air-terminal unit to determine casing radiated sound10 Figure 7 a Examples of LWand LWA plotted against lgqV for a test with constant total pressure loss coefficient11 Figure 7 b Examples of LW and LWA plotted against lgpt for a test with constant flow rate12 Table 1 Values of 7 for the configurations illustrated in Figure 14 Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI EN ISO 51351998 ii BSI 05-1999 Foreword ISO the International Organization for Standardization is a worldwide federation of national standards bodies ISO member bodies. The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission IEC on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 of the member bodies casting a vote. International Standard ISO 5135 was prepared by ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. This second edition cancels and replaces the first edition ISO 51351984, of which it constitutes a technical revision. Annex A of this International Standard is for ination only. Descriptors Acoustics, air terminal devices, pressure equipment, dampers, valves, noise sound, engine noise, tests, acoustic tests, determination, sound power, acoustic measurements. Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI EN ISO 51351998 BSI 05-19991 Introduction This International Standard defines requirements for acoustic testing in reverberation rooms of the type of equipment listed in clause 1. It is based on the use of ISO 3741, which describes the acoustic test facilities, instrumentation and procedures to be used for precision grade determination of sound power levels in octave or one-third-octave bands of a noise source. 1 Scope This International Standard establishes general rules for the acoustic testing of air-terminal units, dampers and valves used in air diffusion and air distribution systems as defined in ISO 3258 in order to determine sound power levels as defined in ISO 3740. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 32581976, Air distribution and air diffusion Vocabulary. ISO 37401980, Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards and for the preparation of noise test codes. ISO 3741, Acoustics Determination of sound power levels of noise sources using sound pressure Precision s for reverberation rooms1. ISO 52191984, Air distribution and air diffusion Laboratory aerodynamic testing and rating of air terminal devices. ISO 52201981, Air distribution and air diffusion Aerodynamic testing and rating of constant and variable dual or single duct boxes and single duct units. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 sound pressure level Lp ten times the logarithm to the base 10 of the ratio of the mean-square sound pressure of a sound to the square of the reference sound pressure, in decibels NOTEThe reference sound pressure is 20 4Pa. 3.2 sound power level LW ten times the logarithm to the base 10 of the ratio of a given sound power to the reference sound power, in decibels NOTEThe reference sound power is 1 pW 10– 12W. 3.3 frequency range of interest the range which includes the octave bands with midband frequencies between 63 Hz and 8 000 Hz or the one-third-octave bands with midband frequencies between 50 Hz and 10 000 Hz NOTEMany rooms will not be qualified for measurements below the one-third-octave band centred at 100 Hz and the octave band centred at 125 Hz, respectively. In these cases the result may still be reported provided that all deviations are clearly indicated in the test report. 3.4 reverberant sound field that portion of the sound field in the test room over which the influence of sound received directly from the source is negligible 4 Acoustic test facilities and procedures This International Standard is applicable to equipment operating under steady state conditions and with a volume less than 2 of the volume of the reverberation room. The acoustic test facilities, instrumentation and procedures to be used, including room qualification tests, are described in ISO 3741. This document offers a choice of two s for reverberation room measurements for determining sound power levels. The comparison uses a reference sound source having a known sound power output. The direct requires knowledge of the reverberation time of the room in which the determination is made. 1 To be published. Revision of ISO 37411988 and ISO 37421988 Licensed Copy leevincentpow leevincentpow, March 18, 2002, Uncontrolled Copy, c BSI EN ISO 51351998 2 BSI 05-1999 If there are substantial variations in the reverberant room characteristics due to the presence of the source to be tested, then the test room shall also be qualified according to ISO 3741 with all equipment present in the room. 5 Installation and operation of equipment to be tested 5.1 General 5.1.1 When the equipment is mounted closer than 1 m to one or more reflecting planes the sound power level may depend strongly on the position of the equipment relative to these planes. Therefore, install the equipment to be tested in a position representative of normal usage. Figure 1 illustrates the overall test environment, with the specific details of each type shown in Figure 2 to Figure 6. NOTEReflecting planes may, for practical reasons, be simulated by panels with an area-related mass greater than 7 kg/m2. Such panels should extend at least 1,2 m in all directions measured from any edge of the device under test. These panels should be vibration isolated from the equipment under test. 5.1.2 Supply air to the equipment under test or exhaust air from it through a test installation in accordance with ISO 5219 or ISO 5220. 5.1.3 Include air-flow control accessories dampers, deflectors, straighteners, equalizers, etc. normally used in conjunction with the equipment under test in the test set-up. Locate and set them in the same manner as recommended for the application of the equipment. 5.2 Test installation of air-terminal units, dampers and valves for measurement of the sound radiated to the reverberation room 5.2.1 Position air-terminal devices normally installed in a boundary surface no closer than 1 m to the intersection of any adjacent surface and away from any position