Last edited 17 Feb 2025

Acoustic frequency

Approved document E: Resistance to the passage of sound, 2003 edition incorporating 2004, 2010, 2013 and 2015 amendments, defines frequency as: ‘The number of pressure variations (or cycles) per second that gives a sound its distinctive tone. The unit of frequency is the Hertz (Hz).”

See also: Sound frequency.

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