What exactly does Dn,e W dB indicate?
April 8, 2011 12:10 AM Subscribe
What does Dn,e W dB indicate exactly?
It is a measurement that refers (apparently exclusively) to the acoustic attenuation performance of "trickle vents".
posted by Nish ton to Technology (4 answers total) 1 user marked this as a favorite
I have been asking everywhere to try to find an answer to this.
It is a measurement that refers (apparently exclusively) to the acoustic attenuation performance of trickle vents, such as, for example: http://www.greenwood.co.uk/data/DN%20Vent%20data%20sheet.pdf
I suspected it indicates that it is e-weighted sound power level, but that would be a bizarre way to measure this. What the Dn stands for I have no idea.
Googling turns up nothing except more pages of manufacturer's trickle vent product pages.
In the sheet I linked to above the sound attenuation curve indicates that with this weighting curve, whatever it is, results in an attenuation of 39 dB rating at 125 Hz, which doesn't really make any sense. That's a lot higher than a "soundproof" staggered stud wall's a-weighted rating (about 20 dB).