Hertz (Hz)

Last Updated: January 27, 2019

Definition - What does Hertz (Hz) mean?

Hertz (Hz) is a unit of measure used with sounds and is part of the reporting in audiometric testing. It is a standard unit of frequency equivalent to cycles per second. This unit of frequency is used to measure wave frequencies. Hertz is also used as the plural form.

WorkplaceTesting explains Hertz (Hz)

Hertz (Hz) is a measure of sound. Frequency is measured by the number of sound waves per one second, called a Hertz. Sound is defined as pressure waves caused by a series of vibrations. These waves, or energy, can be heard. When these waves reach our ears, the waves are received and transmitted to the brain, which translates them into recognizable sound.

Hertz measures these waves frequencies to classify sound. The more waves measured per second mean a faster vibration, which results in a higher pitched sound. Fewer waves mean less vibration and a lower pitched sound.

An individual with healthy or normal hearing can hear very low frequencies of 20 Hz to a very high frequency of 20,000 Hz.

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