A vibrating object generates wave of wavelength 17 cm. If speed of wave in air is 340 m/s. The
sound produced is
(A) Audibal
(B) Ultrasonic
(C) Infrasonic
(D) Cannot be determined
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2
Answer:Audial
Explanation:Speed of the sound is,
v=vλ
v=
λ
v
=
0.01
340
=34000Hz
Our audible range is 20 Hz 20 kHz. The obtained frequency is above this value. Since the given sound wave belongs to the ultrasonic range, it is not audible.
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