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CBSE Class 9 Answered

you have told in tv episode that chidren can hear the frequency of sound till 30 Khz
Asked by | 23 Nov, 2008, 08:40: PM
answered-by-expert Expert Answer

Yes you are right. But it  differs from child to child. Generally , Children can hear higher frequencies which adults cannot hear.As the age  increases the upper limit drops gradually . At the age of about 70 years, this frequency might even fall to 8KHz. This phenomenon is called presbycusis.

Answered by | 23 Nov, 2008, 11:40: PM
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