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Jeffrey Sirianni audioman at HCTC.NET
Sun Jul 20 13:14:14 EST 1997

Received in personal email account.  Comments from participants of
bionet.audiology appreciated.  Jeff

>Date: Sat, 19 Jul 1997 00:05:13 -0400
>From: Steve C <steve927SPAM at ix.netcom.com>
>Reply-To: steve927 at ix.netcom.com
>To: audioman at hctc.net
>Subject: protection
>Hi Jeff, I don't know if you remember me but we spoke about 9 months
>ago. I posted this message to the bionet group and wondered if you had
>an answer.
>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
>Tinnitus faq: http://www.cccd.edu/faq/tinnitus.html
>hazell's habituation therapy: http://www.tinnitus.org
* Jeff Sirianni, M.A., CCC-A                      *
* Sound Advice / R.G. Delaney, M.D.               *
* 710 Water Street / Suite 404                    *
* Kerrville, TX  78028                            *
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* (210) 896-1433                                  *
* (210) 896-1440 FAX                              *
*                                                 *
* audioman at hctc.net                               *
*                                                 *
* Discussion Leader of bionet.audiology Newsgroup *

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