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A person can hear sound waves in the frequency range 20 Hz to 20 kHz. Find the minimum and the maximum wavelength of sound that is audible to the person. The speed of sound is 360 m s-1.

A person can hear sound waves in the frequency range 20 Hz to 20 kHz. Find the minimum and the maximum wavelength of sound that is audible to the person. The speed of sound is 360 m s-1.

Grade:10

1 Answers

Jitender Pal
askIITians Faculty 365 Points
10 years ago
Sol. a) for maximum wavelength n = 20 Hz. As (η∝1/λ) b) for minimum wavelength, n = 20 kHz ∴ λ = 360/ (20 × 10^3) = 18 × 10^3 m = 18 mm ⇒ * = (v/n) = 360/20 = 18 m.

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