3 ms·
You don't record each "waves" (nor is it even possible), you record the final result of all the waves superposed together, just like how your ears work.
by fireattack 7y ago
You don't record each "waves" (nor is it even possible), you record the final result of all the waves superposed together, just like how your ears work.
- jcims 7y ago>You don't record each "waves" (nor is it even possible) Depends on what you mean by 'record'. Generally the air pressure is sampled instantaneously, but it can be broken down into frequency components before recording/perceiving. That's kind of how our ears work and in DSP you do an FFT (which you can then pass through an iFFT to synthesize the original signal).
- fireattack 7y agoIt has been a while since I study DSP, so I'm not sure if FFT can mathematically recover all the original sine waves (FT can). But I don't think it is possible practically, at least.
- kortex 7y agoYes, if you use the FFT or any discrete FT, you can perfectly recreate the signal up to the Nyquist frequency. To perfectly recreate the whole signal, you'd need infinite Fourier coefficients.
- fireattack 7y agoThanks