Question

why sound reflect and how ? ​

Answer 1

Reflection of a sound wave at a barrier, as if from an imaginary source at an equal distance behind the barrier.

Sound reflection gives rise to DIFFUSION, REVERBERATION and ECHO. Different surfaces have different reflecting powers, as measured by their ABSORPTION COEFFICIENT or REFLECTION COEFFICIENT.

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Answer 2

Answer:

The law for reflection is the same as that for light, i.e. the angle of INCIDENCE of a SOUND WAVE equals the angle of reflection, just as if it were produced by a 'mirror image' of the stimulus on the opposite side of the surface. ... Sound reflection gives rise to DIFFUSION, REVERBERATION and ECHO.