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Audible, infra and ultra sound with its application - class-XI
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A sound waves having certain frequency travels with a speed of 336 m/s and wavelength 3 cm. Calculate the frequency. Will it be audible?
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A
$11200 Hz,\ Yes$
💡 Explanation:
The relationship between frequency, speed of sound and wavelength of a sound wave is given as
$Frequency=\dfrac { Speed\quad of\quad sound }{ Wavelength } \quad $.
Therefore, $Frequency,\quad \nu =\dfrac { 336\quad m/s }{ 0.03\quad m } \quad $, given that the speed of sound is 336 m/s and wavelength is 3 cm, that is 0.03 m.
$Frequency\quad \nu =11200\quad Hz\quad$.
Hence, the frequency of the sound wave is 11,200 Hz which audible because the human auditory system is sensitive to frequencies from about 20 Hz to a maximum of around 20,000 Hz.