It is a reflection of sound that arrives at the listener with a delay after the direct sound. You often observe this phenomenon in mountainous areas. What is it called?

Echo

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Mirage

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Decibel

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None of these

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Solution

The correct option is C Echo
Echo is distinct, reflected sound wave from a surface. Principle of echo is used in echo sounder to find the depth of a sea or the location of shoals of fish. It is a reflection of sound that arrives at the listener with a delay after the direct sound. A true echo is a single reflection of the sound source.

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Similar questions

The repeated reflection that results in the persistence of sound is called reverberation. This phenomenon can be observed in:

Two sounds in a medium are having wavelengths $1.3 m$ and $3.9 m$ . A person listens to these sounds. What difference would the listener feel?

1.3 m

3.9 m

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