1、 ISO 11957:1996Acoustics Determination of sound insulation performancesof cabins Laboratory and in situ measurements(MOD) , ()INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION(ISC)312992005( 11957:1996)62005/86, - 1.092 . - 1.297 . , . , , -, 1 - - , 42 3 , (- 28 9 2005 .) : ( 3166
2、) 00497 ( 3166) 00497 AZAMBYKZKGMDRUTJTMUZUA - - 4 11957:1996 . . (ISO 11957:1996 Acoustics Determination of sound insulation performances ofcabins Laboratory and in situ measurements). , - , . - 5 28 2006 . 271- 312992005 ( 11957:1996) 1 2007 .6 ( ) - ., . , 2007 -, II 3129920051 12 13 24 35 36 .37
3、 58 79 710 711 712 8 () .9 () 11957:1996 .1011III 312992005 Noise of machines. Determination of sound insulation performances of cabins. Laboratory and in situ test1 ().,- ( ), , - . c113c1632%. ( , , , . .). (c ) 30691.2 : 1716882 . - (61260:1995 . , NEQ) 1718781 . (61672-1:2002. . 1. , NEQ) 306912
4、001 ( 487196) . - ( 4871:1996 . , MOD) 312742004 ( 3741:1999) . .(3741:1999.- . , OD) - , 1 , , . (), (-) . , , , , .1 312992005( 11957:1996) 200703013 :3.1 (A-weighting): 171871.3.2 (cabin):,.3.3 (sound pressure level) Lp, : , .20(2 c215 105).3.4 (averagesoundpressurelevel)Lp, :-,Lp c61 10lg10 10 1
5、001 01 0112, ,.LL Lpp pnnc43c43c43c230c232c231c231c246c248c247c247, Lp1, Lp2, Lpn , , n -.3.5 (sound pressure insulation) Dp, : , -,.3.6 (apparent sound pressureinsulation) c162Dp, :,-,. ( ,),-.-.3.7 (apparent A-weighted sound pressureinsulation) c162DpA, :,.3.8 (weighted sound pressureinsulation) D
6、pW,:,2,2-Dp(.8).3.9 (apparentweighted sound pressure insulation) c162DpW, : , 2, 2c162Dp(.8).3.10 (estimatedcabinnoiseinsulation) DpA e,:-,Dp,-(.).3.11 (apparentestimatedcabinnoiseinsulation)c162DpA e, : , c162Dp , -(.).3.12 (internalnoiselevel)LpA, :,.3.13 (backgroundnoiselevel), , :- .3.14 (leakra
7、tio) c113:-,.1 , , (seal ratio)c121c121( =1/c113).2 3129920052 .3.15 (empty cabin): c .3.16 (reverberant sound field): - , .3.17 (room): , .4 (. 6) - 31274. (. 7) , - 7.2.1 7.2.2 . . , . . .,- Dp,W, . , . , ( ) .5 , , 1 17187 1, 1 1. . 1 17168 3. - , c177 0,3 ( 1 4).1 , , - .2 2.6 6.1 31274. 6.46.6.6.2 , - . 100 10000 - . , . 50 80 2 . 6.4 6.5.6.3 .3 312992005 . , (.) , ,- . . ( ) - 6.7. 10 . , . , , - .6.4 , - . , () , , .
