ear protection

Steve C steve927SPAM at ix.netcom.com
Fri Jul 18 17:11:48 EST 1997


I have tinnitus and recruitment and had a question about the net effect
of cumulative protection.

My daughter wants me to take her on a jet ski on vacation. I know that
withought hearing protection I will feel afterwards like I've been
slugged in both my ears. Anyone with hyperacusis or recruitment should
know what I mean.

If I wear ER-25 plugs and then use the muff type headset with a rating
of 29-NRR, I don't think they are cumulative with 100 dB being reduced
to 100-54=46.

Could someone tell me what the dB reduction, theoretically I guess,
would be with 29 dB reduction worn over 25 dB reduction? Also, if there
is a way to calculate it I'd like to know how and why it is done that
way.

Thanks. 
-- 
Tinnitus faq: http://www.cccd.edu/faq/tinnitus.html
hyperacusis:
http://www.visi.com/~minuet/hearing/hyperacusis/hacusis.html
hazell's habituation therapy: http://www.tinnitus.org



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