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# The Human Ear Can Detect Continuous Sounds in the Frequency Range from 20 Hz to 20,000 Hz. Assuming that the Speed of Sound in Air is 330 Ms1 for All Frequencies; Calculate the Wavelengths Corresponding to the Given Extreme Frequencies of the Audible Range - ICSE Class 10 - Physics

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ConceptSound Reflection of Sound Waves

#### Question

The human ear can detect continuous sounds in the frequency range from 20 Hz to 20,000 Hz. Assuming that the speed of sound in air is 330 ms1 for all frequencies; calculate the wavelengths corresponding to the given extreme frequencies of the audible range

#### Solution

Audible range of hearing for a normal human ear is 20 Hz to 20,000 Hz.

Speed of sound in air, v = 330 ms-1

Speed, wavelength and frequency are related as

v = nλ

:. lambda = v/n

nlower = 20 Hz

nupper  = 20,000 Hz

:. lambda_"lower" = v/(n_"lower")

:.lambda_"lower" = 330/20 = 16.5 m

Similary lambda_"upper" = v/n_"upper"

:. lambda_"upper" = 330/20000 = 0.0165 m = 16.5 mm

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#### APPEARS IN

Solution The Human Ear Can Detect Continuous Sounds in the Frequency Range from 20 Hz to 20,000 Hz. Assuming that the Speed of Sound in Air is 330 Ms1 for All Frequencies; Calculate the Wavelengths Corresponding to the Given Extreme Frequencies of the Audible Range Concept: Sound - Reflection of Sound Waves.
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