ISO-10996-1999.pdf
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1、A Reference number ISO 10996:1999(E) INTERNATIONAL STANDARD ISO 10996 First edition 1999-03-01 Photography Still-picture projectors Determination of noise emissions Photographie Projecteurs de prises de vue Dtermination des missions sonores Copyright International Organization for Standardization Pr
2、ovided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 05:09:01 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 10996:1999(E) ISO 1999 All rights reserved. Unless otherwise specified, no part of this publication ma
3、y be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internetisoiso.ch Printed in Switzerl
4、and ii 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 wh
5、ich 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
6、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 1
7、0996 was prepared by Technical Committee ISO/TC 42, Photography. Annexes A, B and the Bibliography of this International Standard are for information only. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 N
8、ot for Resale, 04/20/2007 05:09:01 MDTNo reproduction or networking permitted without license from IHS -,-,- ISOISO 10996:1999(E) iii Introduction Noise emission characteristics include both the sound power level and emission sound pressure level at the work station. The determination of these quant
9、ities allows a) manufacturers to declare the noise emitted; b) comparison of the noise emitted by equipment within the family concerned; c) experimental verification of the noise control measures taken at the design stage. The determination of one or both of the quantities can be required by, for ex
10、ample, legislation, directives, contracts or agreements. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 05:09:01 MDTNo reproduction or networking permitted without license from
11、IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 05:09:01 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISOISO 10996:1
12、999(E) 1 Photography Still-picture projectors Determination of noise emissions 1 Scope This International Standard specifies the means to determine, declare and verify the noise emission characteristics (sound power level and emission sound pressure level at the work station) of still-picture projec
13、tors. It specifies noise measurement methods and the operating and mounting conditions that shall be used for the test. The use of this International Standard ensures the reproducibility of the determination of the noise emission characteristics within specified limits determined by the grade of acc
14、uracy of the basic noise measurement method used. Noise measurement methods allowed by this International Standard are engineering methods (grade 2) and survey methods (grade 3). The engineering grade of accuracy (grade 2) is preferred and is applicable, for example, to type tests or for declaration
15、 and comparison purposes. The survey grade of accuracy (grade 3) is applicable, for example, to quality control purposes during manufacture. Survey methods usually enable measurements to be made in work rooms. 2 Normative references The following normative documents contain provisions which, through
16、 reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of
17、 applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 1755, Photography Projector slides Dimens
18、ions. ISO 3744:1994, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an essentially free field over a reflecting plane. ISO 3746, Acoustics Determination of sound power levels of noise sources using sound pressure Survey method using an envel
19、oping measurement surface over a reflecting plane. ISO 4871:1996, Acoustics Declaration and verification of noise emission values of machinery and equipment. ISO 7574-4:1985, Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part 4: M
20、ethods for stated values for batches of machines. ISO 11203, Acoustics Noise emitted by machinery and equipment Determination of emission sound pressure levels at a work station and at other specified positions from the sound power level. Copyright International Organization for Standardization Prov
21、ided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 05:09:01 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 10996:1999(E) ISO 2 3 Terms and definitions For the purposes of this International Standard, the followi
22、ng terms and definitions taken from the basic noise emission standards apply. Further terms and definitions are given in the International Standards which are designated in clause 2 and the Bibliography. 3.1 sound power level LW ten times the logarithm to the base 10 of the ratio of the sound power
23、radiated by the source under test to the reference sound power; it is expressed in decibels The frequency weighting or the width of the frequency band used shall be indicated. The reference power is 1 pW (1pW = 10-12W). EXAMPLE The A-weighted sound power level is LWA. 3.2 emission sound pressure lev
24、el Lp ten times the logarithm to the base 10 of the ratio of the square of the emission sound pressure, p2(t), to the square of the reference sound pressure, p0 2, measured with a particular time weighting and a particular frequency weighting, selected from those defined in IEC 60651; it is expresse
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