3 ms·
They need to buffer to get a Fourier transform and to do the autocorrelation.
by foobarqux 11y ago
They need to buffer to get a Fourier transform and to do the autocorrelation.
- tobr 11y agoThey say they use an "inaudible high frequency soundwave", so that should be > 20kHz. Shouldn't a buffer of a few milliseconds be more than enough then?
- foobarqux 11y agoPresumably the buffer is longer to make the system more robust by avoiding spurious detections, not because of some fundamental limit like the Nyquist rate. You would need to set the buffer size experimentally.