In which of the following absorbents, absorption takes place due to th – McqOptions

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1.	In which of the following absorbents, absorption takes place due to the frictional losses occurring due to the to and fro movement of the air contained in the material caused by the sound waves?
A.	Cavity resonators
B.	Resonant panels
C.	Porous materials
D.	Composite types
Answer» D. Composite types

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