【讨论】弱弱问，麦克抗声压能力和是否过载是两回事？# Music - 天籁之音
O*e
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据说好像是 麦克抗压大 = 录音不容易过载，可能我理解有误哈。
俺的理解，就是指麦克的振膜能承受的最大强度的声源冲击而不导致录音失真。比如说
录鼓啥的。这里强调的是振膜物理上的handle能力，不是指录音的输入音量。
而且，SPL值一般在130 - 150之间，这个是人声根本不可能达到的。
虽然超过了这个SPL值也会导致削顶，但这个是指音源的音量超过振膜能力导致的，和
输入音量高导致的过载不是一回事。
所以，SPL貌似和录音是否过载木有关系哇？尤其是录人声的时候，怕过载也只能是调
低输入音量了。
“The maximum SPL the microphone can accept is measured for particular
values of total harmonic distortion (THD), typically 0.5%. This amount of
distortion is generally inaudible[citation needed], so one can safely use
the microphone at this SPL without harming the recording. Example: "142 dB
SPL peak (at 0.5% THD)". The higher the value, the better, although
microphones with a very high maximum SPL also have a higher self-noise.”
“SPL handling capability
In many recording situations it is essential to know the maximum Sound
Pressure Level (SPL) the microphone can handle. Please note that in most
music recording maximum peak SPL's easily supersede the RMS value by more
than 20 dB. The RMS value indicates an average SPL and will not show the
true SPL peaks.
It is important to know
1. The SPL where a certain Total Harmonic Distortion (THD) occurs.
2. The SPL where the signal from the microphone will clip, that is the
waveforms will become squares. This is the term: Max. SPL and it refers to
peak values in SPL.
A commonly used level of THD is 0.5% (1% is also often seen), which is the
point where the distortion can be measured, but not heard. Ensure that the
THD specification is measured for the complete microphone (capsule +
preamplifier), as many manufacturers only specify THD measured on the
preamplifier, which distorts much less than the capsule. The distortion of a
circular diaphragm will double with a 6 dB increase of the input level, so
you can calculate other levels of THD by using this factor.
Example: Type 4004 Hi-SPL Omnidirectional Microphone, 130 V”
俺的理解，就是指麦克的振膜能承受的最大强度的声源冲击而不导致录音失真。比如说
录鼓啥的。这里强调的是振膜物理上的handle能力，不是指录音的输入音量。
而且，SPL值一般在130 - 150之间，这个是人声根本不可能达到的。
虽然超过了这个SPL值也会导致削顶，但这个是指音源的音量超过振膜能力导致的，和
输入音量高导致的过载不是一回事。
所以，SPL貌似和录音是否过载木有关系哇？尤其是录人声的时候，怕过载也只能是调
低输入音量了。
“The maximum SPL the microphone can accept is measured for particular
values of total harmonic distortion (THD), typically 0.5%. This amount of
distortion is generally inaudible[citation needed], so one can safely use
the microphone at this SPL without harming the recording. Example: "142 dB
SPL peak (at 0.5% THD)". The higher the value, the better, although
microphones with a very high maximum SPL also have a higher self-noise.”
“SPL handling capability
In many recording situations it is essential to know the maximum Sound
Pressure Level (SPL) the microphone can handle. Please note that in most
music recording maximum peak SPL's easily supersede the RMS value by more
than 20 dB. The RMS value indicates an average SPL and will not show the
true SPL peaks.
It is important to know
1. The SPL where a certain Total Harmonic Distortion (THD) occurs.
2. The SPL where the signal from the microphone will clip, that is the
waveforms will become squares. This is the term: Max. SPL and it refers to
peak values in SPL.
A commonly used level of THD is 0.5% (1% is also often seen), which is the
point where the distortion can be measured, but not heard. Ensure that the
THD specification is measured for the complete microphone (capsule +
preamplifier), as many manufacturers only specify THD measured on the
preamplifier, which distorts much less than the capsule. The distortion of a
circular diaphragm will double with a 6 dB increase of the input level, so
you can calculate other levels of THD by using this factor.
Example: Type 4004 Hi-SPL Omnidirectional Microphone, 130 V”
