- from Sound and Vibration
Pitch is all the different notes of the “song” of life as heard by humans and animals.
The deep roar of a lion has a low pitch and the squeak of a mouse has a high pitch. If you were to play every note on a piano, each one would have a different pitch. Pitch is created by sound waves having shorter or longer wavelengths. The longer the wavelength is the lower the pitch. The shorter the wavelength is the higher the pitch. Pitch is measured by the number of wavelengths that travel through the air per second—or the frequency. The frequency of sound waves is measured in Hertz (abbreviated as Hz). If you play Middle C on a piano, it creates a sound wave with a frequency of about 262 Hz. The highest note on a piano creates a sound wave with a frequency of about 4,186 Hz.