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Home › HSSC Clerk Exams › 2016-11-13 (13 Nov) (Shift-1)

Question 20 of 100

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Sound waves with frequencies greater than 20,000 Hz are:

A

Sonic

B

Ultrasonic

C

Infrasonic

D

Subsonic

Correct Option: B

Explanation

Human hearing is conventionally about 20 Hz to 20,000 Hz. Frequencies above 20 kHz are called ultrasonic.

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