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各位大大,$ l9 @2 E' l" f& I) h' o w! j( D
请问一下,标准有如下叙述:
7 V: R7 z p% a2 F" d9 gFor music where the average sound pressure (long term LAeq,T) measured over the duration of5 d4 K$ e& s. ~ x
the song is lower than the average produced by the programme simulation noise, the warning3 b. H5 T( s# B1 ~
does not need to be given as long as the average sound pressure of the song is below the
. h1 Y4 ^" t2 v2 b" D Bbasic limit of 85 dBA. In this case T becomes the duration of the song.8 N9 x* U. }; z4 w
; J% f2 _! r1 iNOTE 4 Classical music typically has an average sound pressure (long term LAeq,T) which is much lower than the average
% w# C( x5 t& |: g& l |* Z) _programme simulation noise. Therefore, if the player is capable to analyse the song and compare it with the programme
1 }" l$ n+ x! m2 U. J# t# isimulation noise, the warning does not need to be given as long as the average sound pressure of the song is below the basic
- q# f, l5 z. _, ~, r# zlimit of 85 dBA.
/ s: j8 _2 V" c* U o7 ] t* R$ gFor example, if the player is set with the programme simulation noise to 85 dBA, but the average music level of the song is only
" G3 u' w: ~2 p* I. F( [65 dBA, there is no need to give a warning or ask an acknowledgement as long as the average sound level of the song is not
6 g1 d3 o6 l) L( g6 R9 w5 J+ H2 T) Eabove the basic limit of 85 dBA." e# S! a. u! d, U+ ~+ `! O X
( J& U. m0 p" |+ T# ?! T
这里面 描述了 采用标准噪声测试时,超出限制。我们应该用什么样的音乐来测试(古典、流行、摇滚?)。还有上面标红的句子里面说到的对比是怎么样对比的。
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