What Is an Audio Frequency Generator?

An audio frequency generator is an electronic device that is used to create sound waveforms at different frequencies. An audio generator is capable of creating sound frequencies across a broad spectrum and is sometimes used to test a person's hearing range.

The frequency of a sound wave is measured using a unit called Hertz (Hz). Frequency measures the number of cycles a waveform makes in a second. One hertz represents one cycle per second. The typical hearing range for humans is between 20 and 20,000 Hz. This range gradually decreases as a person ages or experiences ear damage. The sound frequency range divides into the sub-audio rate, audio rate and ultrasonic rate. Anything below 20 Hz is sub-audio, while anything above 20,000 Hz is considered ultrasonic. The average hearing range for humans falls within the audio rate.

An audio frequency can generate frequencies in the sub-audio rate, audio rate and the ultrasonic rate. An audio generator can also create different sound waveforms such as sine waves, square waves and triangle waves. Most generators also have a setting to increase or decrease the intensity of the sound output in order to test the hearing sensitivity of a person taking a hearing test.