The material generally used for sound proffing of rooms like a recording studio and auditorium, etc. is

The material generally used for sound proofing of rooms like a recording studio and auditorium, etc. is

The material generally used for sound proofing of rooms like a recording studio and auditorium, etc. is

The material generally used for sound proofing of rooms like a recording studio and auditorium , etc is :

The material generally used for sound proofing of rooms like a ecording studio and auditorium, etc.

The material generally used for sound proofing of rooms like a recording studio and auditorium etc is

How do music recording studio cut off unwanted sound?

Refractory materials are generally used in furnaces because