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frequency range for human ear

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danroll | 14:50 Thu 16th Mar 2006 | Body & Soul
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does anyone know where i can find a diagram or graph showing the frequency range for the human ear?
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All I know is the ear range is between 20kHz and 20,000 kHz, If you want to put that on a graph.
It differs by age too. I'm no medical expert but I remember seeing something on TV the other week about this invention which emits a noise only teenagers and young people can hear, the idea being that they will no congregate around this noise, and yet to others it does nothing.

Normal hearing range for children/adolescents is around 20Hz to 20,000Hz. As you get older the hair cells in the cochlea get damaged or destroyed - this usually affects the hair cells that deal with high frequency sounds first ( as they are neared the "entrance" to the cochlea ). So most people will lose these high frequency sounds first. I test hearing for a living - and it is not very uncommon for people in their 80's to not hear anything above 6,000Hz.


My father-in-law has quite bad noise damage to his hearing - and he has normal (less than 20dBHL threshold) hearing to 4,000Hz - and then no measurable hearing at higher frequencies.


N.B. the description of cochlear function in the first paragraph is VERY simplified.

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