Question

A narrow pulse (for example, a short pip by a whistle) is sent across a medium. If the pulse rate is 1 after every 20 s (that is the whistle is blow for a split of second after every 20 s). Is the frequency of the note produced by the whistle equal to `1//20` or `0.05 Hz`?

Answer 1

The frequency of the note produced by the whistle is not equal to `1//20` or `0.05 Hz`, it is only the frequency of pulse repetition.