what is echo ? explain
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a sound that is repeated as it is sent back off a surface such as the wall of a tunnel mark me brainly
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An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. ... That is why echoes can be heard in a canyon, cave, or mountain range. But sounds are not always reflected.
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In audio signal processing and acoustics, echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is directly proportional to the distance of the reflecting surface from the source and the listener. ... A true echo is a single reflection of the sound source.
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