Question

6. The frequency of subsonic sound
is
O a
(a) more than 20 Hz
O (b) 100 Hz
O (c) less than 20 Hz
O (d) more than 20,000 Hz​

Answer 1

Answer:

Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz. Frequencies above 20,000 Hz are known as ultrasound

Answer 2

answer

Answer:

(a) more than 20Hz

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