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Re: Measuring noise
From: STEPHEN O. FRAZIER,
To: INTERNET:firstname.lastname@example.org, INTERNET:email@example.com
Date: 12/12/97 10:20 PM
RE: Re: Measuring noise
DAVID, My apologies for send my previous message (below) before it was
finished. I had put it in my "out basket" while I searched for another
reference (it placed an alarm clock at 80dB and also listed conversation at
60.) I quoted it in an article I recently wrote for the paper about
bothersome Christmas Music but I can't seem locate it and in the interim I
hit the send button and sent the following message, unsigned.
STEPHEN O. FRAZIER
Writing at 10:49:58 PM on 12/12/97
Message text written by INTERNET:firstname.lastname@example.org
>These numbers seem kind of high to me. My reference source (1981
Encyclopedia Britannica article "Acoustical Engineering") rates "quiet
conversation" at 30 dB, "ordinary conversation" at 40 dB and "noisy
office, telephone conversation, ordinary traffic" at 60-70 dB.
This particular set of figures came from the EPA Joural on Noise and the
Environment, Vol.5, No. 9, Oct. '79. The pamphlet "Noise, Ears and
Hearing Protection" dated 8/88 from the American Academy of Otolaryngolgy
lists a whisper at 30 dB, normal conversation at 60, a lawnmower at 90.
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