Question

What is an echo? What factors are important to get a distinct echo? Why we cannot hear echo produced in our

classroom​

Answer 1

Explanation:

Echo is a sound produced when the original sound is reflected by walls of a given room. ... So for the case of a classroom, no echo is produced because the learners and the furniture block the sound from reaching the wall hence no bouncing back of sound.

Answer 2

Answer:

an echo is a repetition of sound produced by the reflection of sound waves from a reflecting surface. factors required to hear an echo are-

_the minimum distance between the source of sound and the reflecting surface is around 17 m

_the sound should be loud enough so that it could be reaches the receiver after reflection.

•we cannot hear an echo in a classroom because our brain retains the effect of every sound for one tenth of a second 0.1 seconds and so cannot distinguish between two different sounds if they reach the brain within a duration of 1/10th of a second.