Question

in general the frequency of inaudible sound is A) 57 vibration/ second. B) 18 vibration/ second. C) 123 vibration/ second D ) 15000 vibration/ second​

Answer 1

Answer:

B) 18 vibration/ second

Answer 2

Answer:

The answer is option B.) 18 vibration/second.

Explanation:

Becuase human ear cannot detect or perceive sound frequencies which are less than 20 vibrations per second. And 18Hz is lower than 20Hz so no doubt it would be inaudible for a human...