Question

We cannot hear the sound above ______Hz,and they are called___.​

Answer 1

Answer:

We cannot hear the sound above 20,000 Hz and they are called Inaudible.

Explanation:

We can't hear frequencies above 15 to 20 kHz (varies by person) due to the shape of our outer ears, the transmission characteristics of our middle ears, and the nature of the cochlea to not be responsive to frequencies above 15 to 20 kHz.

Answer 2

Required Answer:

We cannot hear the sound above $\underline { \sf \green{20,000}}$ Hz, and they are called $\underline { \sf \green{ultrasonic \: sound}}$.

Explanation:–

We, humans can only hear frequencies between 20 Hz and 20,000 Hz.

So, above 20,000 Hz are called inaudible or ultrasonic sound that can't be heard by humans.

→ But some animals like dogs can even hear sounds at frequencies higher than 20,000 Hz.

_______________________________

◆ Some more information about types of sound:

● Types of sound:

• Ultrasonic sound → Sound above 20,000 Hz are called ultrasonic sound.

→ Humans can't hear ultrasonic sounds. Only some animals can hear ultrasonic sounds like dogs.

• Infrasonic sound → Sound below 20 Hz are called infrasonic sound.

→ Humans can't hear infrasonic sound. Only some animals can hear infrasonic sounds like

elephant.