作者Piaf (浮思偶得)
看板Philharmonic
标题Re: [闲聊] Durufle plays Bach Organ Works
时间Mon Apr 12 22:15:16 2004
※ 引述《wenthome (槛外人)》之铭言:
: 这里你混淆了声速(sound speed)跟相速度(phase velocity)。
: 在远场的情况下,
: 声音强度可表为:
: I=P^2/(Rho*C),
: 其中C为声速。
: 一般而言,在空气中,
: C = 331+0.6t m/s,声速只与温度和介质相关。
: 而声波的分散性(dispersive)指的则是不同频率的波其相速度不同,
: 这是不同的东西。
Yes, I think you are right. I confused the sound velocity with
the phase velocity. But for an elastic wave, the expression of
the intensity is still valid and c will be the phase velocity.
Anyway, thank you very much for the correction.
--
Piaf @ PTT; klem/Dutchman elsewhere.
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