|
各位大大,
: S+ A: w( a2 b2 _: M! B+ n* b* ~ 请问一下,标准有如下叙述:
6 S. Z$ }% N5 t$ j5 V: vFor music where the average sound pressure (long term LAeq,T) measured over the duration of& u0 d+ K/ Z$ k9 f# }) Z
the song is lower than the average produced by the programme simulation noise, the warning6 @1 D0 y+ ?# c4 ~! `/ k
does not need to be given as long as the average sound pressure of the song is below the
6 D t5 R- f! |6 k+ Q7 Nbasic limit of 85 dBA. In this case T becomes the duration of the song.* e' P: C1 M! A5 V" w7 z
4 u8 O( [2 _$ r4 F) e. g& PNOTE 4 Classical music typically has an average sound pressure (long term LAeq,T) which is much lower than the average" S: E" b* _9 m
programme simulation noise. Therefore, if the player is capable to analyse the song and compare it with the programme
$ L- W# H* B, |6 ^simulation noise, the warning does not need to be given as long as the average sound pressure of the song is below the basic3 u V( h* s. {4 J T
limit of 85 dBA./ x' u/ b5 v8 H; x% ~
For example, if the player is set with the programme simulation noise to 85 dBA, but the average music level of the song is only
& B( l6 `) }6 f$ U65 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
d5 V( z! Y4 E1 c7 ^& S; k/ Rabove the basic limit of 85 dBA.
9 ?: r y+ }8 N8 @3 k0 c* @ }
, A- i5 y, J5 W" ]& @) r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。
9 D a2 R" ^5 c9 _' N- e( f |
|