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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 :6 T" W0 r% N7 e0 Y5 i5 k8 I
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? 2 \- ~% w( T8 Y5 M2 O) E
L[sub]PA[/sub]应该是指LAeq,连续发声
2 ]5 m6 v, b" ^% U: r) D& @L[sub]PA1S[/sub]参考如下:
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Measure 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., M. q% S3 i1 A- m6 m6 q
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As 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).. S! ?7 A @: a/ u6 {7 e# E( N' q2 V( A
8 u X) P0 @0 y( g$ wFor rattles and squeeze toys, the result is the average of the SEL-levels and the highest of the peak levels.4 r3 n0 H/ W$ I6 u' L
Subtract 10 dB from the LpA1s to get the value for one.6 {6 R1 \2 ~& O
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对EN的摇铃和挤压发声玩具的单次LpA1s
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' t/ F! B8 }4 j4 Z$ C0 A( p1、测量LAeq,算出SEL,再减去10。当t=10s,LpA1s=LAeq+10;即单次LpA1s=LAeq。
. X2 G% U6 ?, f% m" R; d2、测量LAE(即SEL),再减去10。
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/ q2 @$ N q+ @楼主可以用声压计这样验算,t=10s的时候,LAE=LAeq+10
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仪器参数可以去看说明书,里面都有说的# u4 j, X4 } V3 G/ i6 O
/ E; @$ {1 r; Q! \& f若有错误请前辈们指出,谢谢 |
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