Noise level - NC and dBA

[sparo]

Hi all,

Kindly enlighten me. what is the definition NC and dBA.

[smpsmp45]

http://home.tir.com/~ms/concepts/concepts.html#levels

[frank]

I don't think that link gives a proper answer to the question. Just the basics to hearing.

Any more takers?

[Don Davis]

This may help you. It's about sound testing for Cooling Towers but does have some definitions and a lot of reference material.

http://www.evapco.com/media/pdf/128-CTI-Test-Code-for-Sound-Measurement.pdf

[Brian_UK]

NC = Noise Criteria
Which I believe is the noise level required by the specification/designer.

db A = Decibels, A range
A measurement system for measuring noise levels.

[sparo]

Thanks all for the info.


Regards