What is the pitch of a sound is determined by what?

The pitch of a sound is determined by its frequency, which is the number of oscillations or vibrations per second (measured in Hertz). Higher frequency sounds have a higher pitch, while lower frequency sounds have a lower pitch. This is because the human ear perceives the frequency of a sound wave as the pitch of the sound. For example, a high-pitched sound like a whistle has a higher frequency than a low-pitched sound like a bass drum. The pitch of a sound can also be affected by other factors such as the intensity (loudness) of the sound and the harmonic content (complexity) of the sound wave.