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Sound insulation

Sound insulation controls how much sound travels from one room to another.

Sound insulation influences the sound level in the receiving space. Good sound insulation helps to provide:
 

  • More privacy between rooms
  • Better concentration in the adjacent room

 

Sound absorption influences sound insulation

In practice, there is a strong link between sound absorption and room-to-room sound insulation. This link is not accurately reflected in laboratory testing. In practice, two ceilings with the same CAC but with different sound absorption coefficients (NRC) will produce different levels of perceived sound insulation. 

 
The ceiling with the highest NRC will do a better job of lowering the sound pressure in both the sending and the receiving room. The impact of sound absorption on the perceived sound pressure level can be calculated and has been verified through in-situ testing.
 
 
 
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