Frequency determines the Pitch of a sound. Pitch is the sensation (brain interpretation) of the frequency of an emitted sound. Faster the vibration of the source, higher is the frequency and higher is the pitch. Similarly, low pitch sound corresponds to low frequency.

The pitch of a sound depends on the frequency of the source of the sound. Frequency is measured in Hertz (Hz), with one vibration per second being equal to one hertz (1 Hz). A high frequency generally produces a high pitched note and a low frequency similarly produces a low pitched note.

Pitch, in turn, depends on the frequency of sound waves. Wave frequency is the number of waves that pass a fixed point in a given amount of time.

Sounds may be generally characterized by pitch, loudness, and quality. The perceived pitch of a sound is just the ear's response to frequency, i.e., for most practical purposes the pitch is just the frequency.