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引用第0楼crystal22于2009-04-09 09:03发表的 关于音量测试 :" U0 P" q; S8 Q% j' r0 L
急求:用B&K2238的音量计,请问EN71中的L[sub]PA[/sub]相当于2238中的哪个值?L[sub]PA1S[/sub]又相当于2238中的哪个值?MATTEL QSOP3600中的SEL相当于2238中的哪个值?
. ^1 G, B0 q3 y+ E3 Y: cL[sub]PA[/sub]应该是指LAeq,连续发声
: x# p. q6 n& o. k: g6 l+ Y9 k% [L[sub]PA1S[/sub]参考如下:
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, d- r* ^/ x* \0 D3 eMeasure the A-weighted single-event emission sound pressure level, LpA,1s, and the C-weighted peak emission sound pressure level, LpC peak for ten movements (squeezes, beats). Carry out the test three times.
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* [9 p# p' @% V; G1 H. U% ^8 hAs an alternative to SEL, LAeq can be measured and the total measurement time t registered. The single-event emission sound pressure level can then be calculated from SEL = LAeq + 10 lg(t).: {+ g, }+ Z! ^
, |9 c- G6 W5 jFor rattles and squeeze toys, the result is the average of the SEL-levels and the highest of the peak levels.
$ f% C) c+ n( s6 @Subtract 10 dB from the LpA1s to get the value for one.
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3 S1 i$ g& d: S h对EN的摇铃和挤压发声玩具的单次LpA1s
; t( u7 T& _! [; Q. f1 n X有两种途径可以算出:# ?) {" ?6 a) x6 C8 K; ^+ U/ l
1、测量LAeq,算出SEL,再减去10。当t=10s,LpA1s=LAeq+10;即单次LpA1s=LAeq。9 K; W Z1 J! l" f2 D) l. Q
2、测量LAE(即SEL),再减去10。+ l- j4 v+ ~3 A8 ~; A2 A/ h% m
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楼主可以用声压计这样验算,t=10s的时候,LAE=LAeq+10
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' n/ r" K( J n* L仪器参数可以去看说明书,里面都有说的: [4 ?1 l4 s4 t; K
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若有错误请前辈们指出,谢谢 |
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