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WHAT IS (AF) AUDIO FREQUENCY ?
 
   

Audio frequencies are those which maybe heard by the ear when energy is in the form of sound waves. The AF range is from about 16 Hz to 20,000 Hz, however, the limits vary with different persons. Most people can hear from 30 Hz to 15,000 Hz.

 

The sound from an orchestra may cover most of the AF range (fundamentals and harmonics) however the range use for speach is much lower. The sensitiveness of the ear varies over the AF range. There is a maximum at about 20,000 Hz and decreases as the upper and lower limits of audibility are approached.

For example, TV commercial audible noise can be much more annoying to the hearing of an older person compared to a younger person. Some people may think it's the visual commercial that annoys the older person however, even if the older person was not able to see the commercial and only listened to audio content, it's that content that is either to high or perhaps to low for the older person to hear. The point here is that the human ear drum will deteriate over time and the audio frequencies (AF) range will become narrower.

This page was last modified on 19 January 2010 and maybe out of date with regards to newer practices at the time of reading this article

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