Question

what is sound and frequecy

Answer 1

Frequency is the speed of the vibration, and this determines the pitch of the sound. It is only useful or meaningful for musical sounds, where there is a strongly regular waveform. Frequency is measured as the number of wave cycles that occur in one second. The unit of frequencymeasurement is Hertz (Hz for short).

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Answer 2

Sound- In physics, sound is a vibration that propagates from one medium to another medium.

Frequency- In physics, frequency is the number of oscillation per unit time. It's SI unit is Hertz (Hz).