An audio frequency (abbreviation: AF) or audible frequency is characterized as a periodicvibration whose frequency is audible to the average human. The SI unit of audio frequency is the hertz (Hz). It is the property of sound that most determines pitch.[1]
The generally accepted standard range of audible frequencies is 20 to 20,000 Hz,[2][3][4] although the range of frequencies individuals hear is greatly influenced by environmental factors. Frequencies below 20 Hz are generally felt rather than heard, assuming the amplitude of the vibration is great enough. Frequencies above 20,000 Hz can sometimes be sensed by young people. High frequencies are the first to be affected by hearing loss due to age and/or prolonged exposure to very loud noises.[5]
^Heffner, Henry; Heffner, Rickye (January 2007). "Hearing Ranges of Laboratory Animals". American Association for Laboratory Animal Science46 (1): 20. Retrieved 19 September 2014.
^Rosen, Stuart (2011). Signals and Systems for Speech and Hearing (2nd ed.). BRILL. p. 163. For auditory signals and human listeners, the accepted range is 20Hz to 20kHz, the limits of human hearing
^Bitner-Glindzicz, M (2002). "Hereditary deafness and phenotyping in humans.". British medical bulletin63 (1): 73–94. doi:10.1093/bmb/63.1.73. PMID12324385.|accessdate= requires |url= (help)
