Science Fill in the blanks: [1 M]

Sound which is pleasing to the ear is called musical sound.

Sounds are produced by vibrating objects.

The human voice box is called larynx.

The shrillness of a sound is determined by the frequency of vibration.

A set of three tiny bones in the middle part of ear passes on sound vibrations from the eardrum to the liquid in cochlea.

Sound cannot travel in vacuum.

Unpleasant sound is called noise.

A person having partial hearing loss can hear properly by wearing a device called hearing machine on the ear.

The time taken by an object to complete one oscillation is called time-period.