Question

The loudness of a note decreases if:

Options

• its distance from observer increases

• the amplitude of vibrating body decreases

• the amplitude of vibrating body increases

• its distance from observer increases and the amplitude of vibrating body decreases

Answer 1

Its distance from observer increases and the amplitude of vibrating body decreases.

Explanation:

Sound intensity decreases as the distance from the source increases. A smaller vibration amplitude also produces a less intense sound, so both changes reduce loudness.