Question

whatis an echo? what factors are important to get a distanct echo?​

Answer 1

Answer:

1) The minimum distance between the source of sound and the reflector in air must be 17m. 2) The size of reflector must be larger enough to the wavelength of sound wave. 3) The intensity of sound should be such that the reflected sound reaching the ear is sufficiently intense to be audible.

Explanation:

Answer 2

Answer:

echo is refection of sound what we speak

it depends whether the place is covered four sides