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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 :
5 Y; ~9 X7 p& _6 \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? 7 i5 \2 [7 a% [5 b0 f
L[sub]PA[/sub]应该是指LAeq,连续发声
! P' P3 g. s+ `# f3 rL[sub]PA1S[/sub]参考如下: [5 Y, M- ^' M8 ?' d+ s9 o
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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.
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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).
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For rattles and squeeze toys, the result is the average of the SEL-levels and the highest of the peak levels.
. ^, O3 ? I" ~ E" }Subtract 10 dB from the LpA1s to get the value for one.
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, W2 [& \ |8 D对EN的摇铃和挤压发声玩具的单次LpA1s
# l" s/ J4 @7 y1 b3 _有两种途径可以算出:) v# j4 n+ Q% Z) C' a |
1、测量LAeq,算出SEL,再减去10。当t=10s,LpA1s=LAeq+10;即单次LpA1s=LAeq。
$ d1 o& m% N* H( k1 P4 L y2、测量LAE(即SEL),再减去10。
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( x' _7 A* i" F7 h* S9 s楼主可以用声压计这样验算,t=10s的时候,LAE=LAeq+105 v; U2 U C. L) q2 K! i+ a
" y' a8 A. Z4 W& A2 C" O# F7 h! p) J仪器参数可以去看说明书,里面都有说的* E2 s* S5 ^, \
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若有错误请前辈们指出,谢谢 |
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