Science Write the Correct Alternative.

The ……………………………… receives the vibrations coming from the membrane and converts them into electrical signals which are sent to the brain through the nerve.

……………………………… are used in sonography.

The loudness of a sound depends upon ……………………………… .

Sound waves with frequency greater than 20 kHz are called ……………………………… .

The velocity of sound is inversely proportional to the ……………………………… .

SI unit of ………………………………. is Hertz (Hz).

Sound will not travel through ……………………………… .

The normal hearing range for humans is ……………………………… .

The unit of frequency is ……………………………… .