What happens to sound when frequency increases?

Hint: A sound is a form of energy which is produced due to the vibration of the objects. These vibrations need a material medium to propagate. The material medium can be a solid, liquid or gas.

Complete step by step solution:
The sound is produced due to vibrations and human beings are able to hear it. The frequency of a sound wave is defined as the number of vibrations that are passing through a point in one second. The frequency of a sound wave is given by the unit Hertz written as Hz. If the frequency of the sound wave is increased or decreased, it affects the pitch of the sound that is produced.

If the frequency of the sound wave is increased, the sound produced will also be of high pitch. As a result, a shrill sound will be produced. For example, the voice of a woman is of higher pitch than that of a man, and a chirping or a singing bird produces a sound of high pitch.

Hence, the pitch of the sound will increase if we increase the frequency of it.

Note: It is to be noted that the loudness and pitch are not the same but are different from each other. Frequency determines pitch while amplitude determines loudness. Where pitch depends on frequency, loudness is independent of frequency. Pitch determines whether the sound produced is shrill or flat and loudness determines whether the sound produced is loud or faint. Since sound is a form of energy, loudness is the energy that the human ear receives while vibrations are taking place. Whereas pitch does not depend on the energy.