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Darina [25.2K]
3 years ago
15

A child has an ear canal that is 1.3 cm long. At what sound frequencies in the audible range will the child have increased heari

ng sensitivity?
Physics
1 answer:
ElenaW [278]3 years ago
7 0

Answer:

The answer to this is

6600 Hz to 19,800 Hz

Explanation:

The shape of the human ear is analogous to a closed ended pipe hence

we have λ = 4L or wavelength = 4 * length of the child ear

The frequency  c/λ  where c = speed of sound = 343 m/s

hence the child's audible range is multiples of 343/(4*0.13) =6600Hz

or 13200 Hz or 19,800 Hz

The generally quoted range of human hearing is 20 Hz to 20 kHz

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