Acoustical study of industrial process buildings

[nilaypathak]

Acoustical study of industrial process buildings recommend to have NRC (Noise Reduction coefficient) value =0.75 for Pre-engineered Metal Building Walls and Roofs.
I could not find what would be the value of NCR for Standard metal building walls and roof system- Inside and outside liner with insulation.
Please share detail for Pre-Eng Metal building that meets NCR-0.75. Seeking for more references for NCR values of Pre-Eng building wall and Roof sections.
Thank you in advance for your valuable input.

 

[GregLocock]

Your supplier should be able to give you an NRC number for their panels. It will depend on how thick the insulation is and what it is made of, more than the underlying structure. Absorption coefficient at the important frequency in your application is far more useful than the overall number

eg

http://www.envirospray300.com.au/products/nrc.asp

Cheers

Greg Locock


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