Question

Q18. What are infrasonics?​

Answer 1

Answer:

The answer is below

Explanation:

The sound of frequency having lesser than The audible range that is below 5,000 htz it is called infrasonic sound.

Answer 2

Alternative Title: infrasonic wave. Infrasonics, vibrational or stress waves in elastic media, having a frequency below those of sound waves that can be detected by the human ear—i.e., below 20 hertz. The range of frequencies extends down to geologic vibrations that complete one cycle in 100 seconds or longer.