Sun January 27, 2013 By:

why a smooth surface reflects more sound than a rough surface

Expert Reply
Sun January 27, 2013
If the surface that the sound wave hits is relatively smooth, more sound will be reflected than if the surface is rough. For example, more sound will be reflected from a smooth wall made of mud than a pile of dirt. The reason is that the rough or porous surface allows for many internal reflections, resulting in more absorption and less reflection.
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