Question

7. What are audible and inaudible sounds?​

Answer 1

Inaudible And Audible Sound

So the frequencies below 20 Hz and above 20 kHz comes under the category of inaudible frequencies. The low-frequency sound which the human ear cannot detect is also known as infrasonic sound. Whereas the higher range inaudible frequency is also known as ultrasonic sound.Jan

Answer 2

Answer:

So the frequencies below 20 Hz and above 20 kHz comes under the category of (inaudible) frequencies. The low-frequency sound which the human ear cannot detect is also known as infrasonic sound. ... Some animals like dogs have the ability to hear sounds having frequencies higher than 20 kHz.

A reasonably standard definition of (audible) sound is that it is a pressure wave with frequency between 20 Hz and 20,000 Hz and with an intensity above the standard threshold of hearing. Since the ear is surrounded by air, or perhaps under water, the sound waves are constrained to be longitudinal waves