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Hello people ~
The frequency of subsonic sound is
(a) more than 20 Hz
(b) 100 Hz
(c) less than 20 Hz
(d) more than 20,000 Hz
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fieryanswererft

less than 20 Hz

The frequency of subsonic sound is less than 20 Hz

subsonic sound refers to a sound which has a wave that travels slower than the speed of sound.

  • frequency of audible sound: 20 Hz to 20,000 Hz

Thus subsonic sound < 20 Hz

Answer:

less than 20Hz

Explanation:

  • Human ears can hear sounds coming in range of 20Hz to 20000Hz or 20kHz.
  • Low or beneath is not audible.

Bats can hear below 20Hz ,so they use this to travel in air