1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 0 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU4%,%0(/.%G0G042!.3-)33)/.G0G015!,)49/“*%#4)6%G0G0-%!352).G0G0!00!2!4533/5.$G0G0,%6%,G0G0-%4%23G0G0 !00!2!453G0G0&/24(%G0G0/“*%#4)6%G0G0-%!352%-%.4G0G0/&G0G02/-./)3%G9)45G134G0G0RecommendationG0G00 (Extract fr
2、om the “LUEG0“OOK)NOTES1 ITU-T Recommendation P.54 was published in Volume V of the Blue Book. This file is an extract from theBlue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, thecontents of the file are identical to the Blue Book versi
3、on and copyright conditions remain unchanged (see below).2 In this Recommendation, the expression “Administration” is used for conciseness to indicate both atelecommunication administration and a recognized operating agency. ITU 1988, 1993All rights reserved. No part of this publication may be repro
4、duced or utilized in any form or by any means, electronic ormechanical, including photocopying and microfilm, without permission in writing from the ITU.Volume V - Rec. P.54 1Recommendation P.54Volume V - Rec. P.54SOUND LEVEL METERS (APPARATUS FOR THE OBJECTIVE MEASUREMENT OF ROOM NOISE)(amended at
5、Mar del Plata, 1968 and Geneva, 1972)The CCITT recommends the adoption of the sound level meter specified in 1 in conjunction, for most uses,with the octave, half, and third octave filters in accordance with 2.References1 International Electrotechnical Commission Standard, Sound level meters, IEC Publication 651 (179), Geneva,1979.2 International Electrotechnical Recommendation, Octave, half-octave and third-octave band filters intended forthe analysis of sounds and vibrations, IEC Publication 225, Geneva, 1966.
