Why must the sampling rate be twice the sampling component? I know human cant hear above 20khz and therefore signal has to be sampled at 40khz. But why? is this to get a lot of detail?
Physics Sampling watch
- Thread Starter
Last edited by joyoustele; 24-10-2017 at 15:38.
- 24-10-2017 11:26
- 24-10-2017 15:04
Probably you mean kHz rather than Hz
It's the fairly well known result of Nyquist sampling theorem - in effect it's the limit on the frequency of an analogue signal you can recover from discrete samples without 'aliasing' i.e. creating artifacts in the recovered analogue signal.