3 ms·
Audio signals are alternating. The voltage corresponds to the sound pressure picked up by the microphone, which typically looks more or less like a bunch of sin
by tkok 15y ago
Audio signals are alternating. The voltage corresponds to the sound pressure picked up by the microphone, which typically looks more or less like a bunch of sinusoids.
- kwantam 15y agoIt's not just typically a bunch of sinusoids: Fourier tells us that it is always the sum of a bunch of sinusoids. [1] http://en.wikipedia.org/wiki/Fourier_transform http://en.wikipedia.org/wiki/Fourier_transform