Noise Criteria?
Noise Criteria?
(OP)
Does anyone know of any sites where I can find out about Noise Criteria (NC - ##).
I have a list of specific noise criteria for spaces, but I'm not sure how that equates to equipment & ductwork transmitting sound (if the equipment/ducting meet the criteria).
I have a list of specific noise criteria for spaces, but I'm not sure how that equates to equipment & ductwork transmitting sound (if the equipment/ducting meet the criteria).





RE: Noise Criteria?
Their software lets you start with noise levels of a fan and proceed to the NC of the space, incidentally selecting a silencer if required.
http://www.vibro-acoustics.com
http://www.vawsystems.com
RE: Noise Criteria?
While the insertion losses and noise generation of the equipment is automatically placed from catalog selections, you can also enter your own non-fantech values. Lined and unlined ductwork configurations are entered to allow for losses through bends etc. Terminal and room acoustics allowed.
http://www.fantech.com.au/
RE: Noise Criteria?
They usually get into the NC levels
RE: Noise Criteria?
Consult Mc. Quay web.
Regards
RE: Noise Criteria?
- Applications Chapter 47 Sound and Vibration
- Fundamentals Chapter 7 Sound and Vibration
Most suppliers refer back to the ASHRAE handbooks, and rely on it as the standard for the industry.