Question

Which is the maximum sound decibel after which a person cannot hear?

Answer 1

Hi  The avg range at which humans can hear is 20 - 20,000 Hz. Beyond it or below it is called  ultrasonica nd infrared sound, respectively which is not audible to  humans.  Hope it helps

Answer 2

Answer:

A person who cannot hear called deaf. Aperson who cannot speak called mute.