1、 2 ISO 9613-2:1996Acoustics Attenuation of sound during propagation outdoors Part 2: General method of calculation(MOD) , ()INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION(ISC)31295.22005( 9613-2:1996)62005/80, - 1.092 . - 1.297 . , . , , -, 1 - - , 42 3 , (- 28 9 2005 .) : ( 316
2、6) 00497 ( 3166) 00497 AZAMBYKZKGMDRUTJTMUZUA c - - 4 9613-2:1996 . . 2. (ISO 9613-2:1996 Acoustics Attenuation of sound during propagation outdoors Part 2:General method of calculation). , - , . 9613-2:1996 5 20 2006 . 135- 31295.22005 ( 9613-2:1996) 1 2007 .6 ( ) - . - , -. , 2006 -, II 31295.2200
3、51 .12 23 , .24 35 46 .47 .57.1 - Adiv.57.2 - Aatm57.3 - Agr67.4 - Abar87.5 128 Cmet139 .14 A () Amisc16 B () 9613-2:1996 1819III 31295.22005 2 Noise. Attenuation of sound during propagation outdoors. Part 2. General method of calculation1 - , , . . , - -. c203 . 63 8000 ( ). , , , , . , , , . . , -
4、 , , - . , ( , ). - , - . ( - ) , 500 . 9.1 31295.22005( 9613-2:1996) 200701012 -: 1716882 . (61260:1995.-,NEQ) 1718781 . (61272-1:2002.1:,NEQ) 312522004(3740:2000) . ( 3740:2000 . .,MOD) 31295.12005 ( 9613-1:1993) . -. 1. ( 9613-1:1993 . .1.,MOD) 312972005 ( 8297:1994) . ( 8297:1994 . .,MOD) -,1- ,
5、 , . (), -()., ,.3 , .3.1 (equivalent continuous A-weighted sound pressure level) LAT,:,LAT=10lg () () / ,12002ptt pAdc242c233c235c234c249c251c250c236c237c239c238c239c252c253c239c254c239(1) pA(t) ,;p0 (p0=20c215106);T ,.1 17187.2 T. : -().3.2 (equivalentcontinuousdownwindoctave-bandsoundpressureleve
6、l)LfT(DW), :-,LfT(DW) = 10 lg () () / ,12002ptt pfdc242c233c235c234c249c251c250c236c237c239c238c239c252c253c239c254c239(2) pf(t) , c ,;f . 1-2-17168.2 31295.220053.3 (insertion loss), : , , - , . , 1. 1 , A Cmet (A)d ( 3) dp ( 1)ds,o - ( 8)do,r - ( 8)dss () (67)dsr ( 67)DI Dz e G h hs ( 1) hr ( 1) h
7、m (- 3)Hmax lmin ( ) ( 8)L c97 /c98 c114 4 -. , , , -, (, . .), . , - , . , (-) , , .3 31295.22005 , - , :) - ;b) ;c) d - Hmax (d 2Hmax). d c1632Hmax (, ), . , , (. 7.5).5 ( ) , :- , (), c17745;- 3 11 1 5 /. LAT(DW), 7, - . c203 (. 3.1, - 2). - , .6 LfT(DW) - - 63 8000 LfT(DW) = LW+ DC A, (3)LW - , 1 , ;DC , , -
