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Loudness

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Question

What will happen to the loudness of sound is surface area of the vibrating body is decreased

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Solution

If the surface area of a vibrating body is decreased then the loudness of sound produced by it will also decrease.

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Q. The greater the surface area of the vibrating body, the________is the loudness of sound.

Q. How does the loudness of sound produced depend on the vibrating area of the body?

Q. The loudness of sound decreases with an:

(1)

Increase in the distance between the ear and the source

(2)

Decrease in the amplitude of the vibrating body

(3)

Increase in frequency of sound

(4)

Decrease in frequency

Q. Question 5
In order to reduce the loudness of a sound we have to

(a) Decrease its frequency of vibration of the sound.
(b) Increase its frequency of vibration of the sound.
(c) Decrease its amplitude of vibration of the sound.
(d) Increase its amplitude of vibration of the sound.

Q. Consider the following sound waves marked A, B, C and D.

Figure

(a) Which two waves represent sounds of the same loudness but different pitch ?
(b) Which two waves represent sounds of the same frequency but different loudness ?
(c) State whether all these sound waves have been produced by the same vibrating body or different vibrating bodies ?
(d) Which vibrating body/bodies could have generated the sound waves shown here ?

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