Question

The loudness of sound depends upon:
A. Its velocity
B. Its pitch
C. Its amplitude
D. Its frequency

Answer 1

Hint: The intensity of the sound depends upon the extent that there is a vibration in the sounding body. This process goes to many steps starting from the external agent of sound till the sensing of sound by ear.

Complete step by step answer:
To know about loudness, we should keep in mind that human hearing is not a single step process, it is a multi-step procedure. Firstly, through the outer medium, a sound wave which is completely physical reaches our ear and then they are converted into electrical signals via nerve fibres and then those signal waves are handled by the brain and then they are realized as noise or we can call it as loudness.
Loudness of sound is not just the energy that is meeting our human ear but it also tells us about the disclosure of this energy that relies upon sensitivity of the human ear so loudness of sound depends on sensitivity of the ear. We can call it the amplitude or intensity of sound.
There are also some factors in which the loudness of the sound depends on and we will see them one by one: -
a. Build-up of loudness upon the concussing body’s surface area.
b. Loudness reduces as the distance increases.
c .Loudness depends upon the force by which the object is shaking.
Amplitude of sound decides the volume of the sound i.e. as large the amplitude the huge the volume of the sound. Loudness of the sound depends on many of these factors and one of the main factors is its intensity and the amplitude of the sound.
So, the correct option is c.

Note: Always remember loudness is directly linked to the intensity of the sound that means if the value of intensity changes, there will be a change in the loudness value too.