# What is loudness of sound? What factors does it depend upon?

Discussion in 'CBSE Class 9 Physics Help' started by Vinila Choudary, Jan 30, 2012.

1. ### Vinila ChoudaryActive Member

The effect produced in the brain by the sound of different frequencies is called loudness of sound.

The loudness of sound increases with the increase in amplitude and the area of the vibrating body. It also depends on the distance of the observer from the source of sound, i.e., less the distance loud is the sound.