what is an echo ? what are important factor to get distinct echo?
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The repetition of sound caused by its reflection off a hard surface is known as echo. Factors important to get a distinct echo are: The minimum distance between the source and reflector of sound should be 17 m. The size of reflector must be large enough as compared to the wavelength of the sound wave.
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Echo is a vibration of sound per second and to get distinct echo we have apply plastic scheets
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