What is an echo? what factors are important to get a distinct echo?
Answers
Answer:
Answer:The repetition of sound caused by its reflection of 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 17m. The size of reflector must be large enough as compared to the wavelength of the sound wave.
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Answer:
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To hear a distinct echo, the time interval between the original sound and the reflected one must be at least 0.1 s. ... Echo is a repetition of sound due to the reflection of original sound by a broad and hard obstacle.
Explanation:
We know that the sound is a type of longitudinal wave, which is transmitted as a series of compressions and rarefactions of the particles of the medium in which it is travelling. When the sound is produced from a source, then it is spread all around and is therefore incident on all of the surrounding objects. After being incident on an object, it gets reflected and returns back to the source. The source thus hears the same sound which it had produced, and perceives it as the echo.
For the human ear, for distinguishing consecutive sounds, the minimum time difference between the two sounds must be equal to 0.1s0.1s. We know that the speed of sound is equal to about 343ms−1343ms−1. Let the minimum distance between the sound source and the object required to a distinct echo be xx. When the sound is incident on to the object and returns to the receiver, it travels a total distance equal to 2x2x.