In an unoccupied hall of a choultry you will experience the echo effect of sound. If the same hall is furnished with almirahs, tables, chairs,and other commodities, you may not experience the echo clearly. It is because,

Sound waves get absorbed by the objects in the hall.

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The area of reflecting surface decreases.

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Reflected sound is reflected again.

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Sound does not get reflected again.

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Solution

The correct option is A Sound waves get absorbed by the objects in the hall.
echo is heard due to reflection of sound and if obstacles are placed in path of sound then they will either absorb sound or will not perfectly reflect sound as before so echo will be not effective one .
so the answer is A.

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In an unoccupied hall of a choultry you will experience the echo effect of sound. If the same hall is furnished with almirahs, tables, chairs,and other commodities, you may not experience the echo clearly. It is because,

The correct option is A Sound waves get absorbed by the objects in the hall.echo is heard due to reflection of sound and if obstacles are placed in path of sound then they will either absorb sound or will not perfectly reflect sound as before so echo will be not effective one .so the answer is A.

The correct option is A Sound waves get absorbed by the objects in the hall.
echo is heard due to reflection of sound and if obstacles are placed in path of sound then they will either absorb sound or will not perfectly reflect sound as before so echo will be not effective one .
so the answer is A.