Explanation : the difference between absorption and transmission of the sound wave
Absorption of the sound wave : sound absorption when the sound wave hit the surface of a room then the some part of the sound energy will reflect back in to the room and some parts penetrates the surface.
some parts of the sound wave energy are absorbed by converting to heat energy in the material.
Transmission of sound wave : when the sound wave propagate from the source through the medium without reflection and absorption this is called transmission .