What is loudness of sound ? What factors does it depend on ?

Explanation

The loudness or softness of a sound depend upon its amplitude. The amplitude of the sound wave depends upon the force with which an object is made vibrate. Loud sound can travel a larger distance as it associated with higher energy whereas soft sound can travel a smaller distance as it is associated with less energy. A sound wave spreads out after it leaves its source of production and as it moves away from the source it amplitude as well as its loudness decreases. Fig. 12.2 shows the wave shapes of a loud and soft sound of the same frequency. Loundness depends upon amplitude, intensity sound and sensitivity of the ear.