Active vs Passive sound attenuation
Active vs Passive sound attenuation
(OP)
I'm intrigued by a quote website selling ear protection -earplugs.
"Noise isolation (34-36 dB) far surpasses that of active noise-canceling earphones"
http://www.etymotic.com/ephp/er6.aspx
Surely that claim is impossible.
At the very least it could be classed as misleading if they're comparing their product with a very specific type of active noise reducer at a restricted frequency range.
Interested in any comments.
Tony
"Noise isolation (34-36 dB) far surpasses that of active noise-canceling earphones"
http://www.etymotic.com/ephp/er6.aspx
Surely that claim is impossible.
At the very least it could be classed as misleading if they're comparing their product with a very specific type of active noise reducer at a restricted frequency range.
Interested in any comments.
Tony





RE: Active vs Passive sound attenuation
I don't think their claims are ridiculous. Performance of passive earplugs is well documented, why do you have a problem with those (very poorly defined) claims?
eg
http://a
etc.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Active vs Passive sound attenuation
It kinda caught my interest. I agree it isn't so bad.
Thanks for your thoughts on the subject.
Tony
RE: Active vs Passive sound attenuation
http://www.etymotic.com/aer/libart-year.aspx Their academic bonafides seem to be quite strong.
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Active vs Passive sound attenuation
Of course this raises the problem of bone conduction etc.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Active vs Passive sound attenuation
Which in my experience should be easy enough to do.