为自己的声卡辩护下,讲一下人的听觉阈值吧
https://www.kv2audio.com/technical-talks-with-george-krampera/part-ii-human-hearing-total-distortion-and-loss-of-information.html
Odd harmonic distortion is caused by disturbances in both half-wavelengths of periodic signal, (Typically established at the amplifier limitation). Even harmonic distortion is caused by disturbances in one half-wavelength, (Typically established at high acoustic pressures, as 2nd harmonic distortion is a function of the acoustic pressure). Listening tests show that odd harmonic distortion is audible form 0.1%, whilst even harmonic distortion is audible form 1%. Non-harmonic distortion is not related to the original signal, it is caused by the slow reaction of the system due to inadequate damping of the acoustic components and filters, and this also creates extraneous noise to be added to the original signal, exhibiting unpredictable behavior of the system. A typical representation and expression of non-harmonic distortion is caused by a long settling time, a low sampling rate and poor DSP processing power. 就按照最小的0.1%来说,这个玩具声卡的精确度也是低了两个数量级啊。 所以..
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