Question

Loudness or intensity of sound depends upon:
(a). Amplitude of sound wave
(b). Area of vibrating body
(c). Distance from the source of sound
(d). All of above

Answer 1

- Hint: Loudness of sound depends upon the sounding body and its extent of vibration. It is based upon the intensity of propagating sound and the sensation or the sensitivity of the sound.

Complete step-by-step solution -
Loudness, to understand this term the first thing that we should understand about this is that human hearing is not a single step process. Human hearing is a multi step process that involves one procedure that starts from the sound that reaches our ear from the external factor and ends at the sensation of sound or we can call it as sound realization.
Loudness is not only the energy of sound that is reaching till the human ear but it also depends on detection of sound waves by our human ear. Loudness relies upon intensity of sound and intensity of sound is the amplitude of sound waves. Loudness of sound also depends upon the sensitivity of sound.
Higher the amplitude of sound the larger the loudness of sound and lower the amplitude of sound waves the softer the loudness of sound and by this we get to know that amplitude of a sound wave decides the loudness of sound or we can call it the intensity of sound. Loudness of Sound also depends upon some of the small factors but the main factor that affects the sounds intensity is its amplitude.
So, the correct option is a.

Note: Always remember loudness of sound waves is directly linked with the vibration of sound and note that it is directly linked with the intensity of sound which rely on amplitude of the sound and scattering in nature.