Question

what are inaudible sound frequencies?

Answer 1

Inaudible sound: Human ear cannot detect sound frequencies less than 20 vibrations per second i.e. 20 Hz. So any sound below this frequency will be inaudible sound for humans. In the high-frequency range, the human ear cannot detect frequencies above 20000 vibrations per second (20 KHz). So the frequencies below 20 Hz and above 20 KHz comes under the category of inaudible frequencies. The low-frequency sound which human ear cannot detect are also known as infrasonic sound. Whereas the higher range inaudible frequency are also known as ultrasonic sound.