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Path: utzoo!watmath!clyde!cbosgd!ihnp4!inuxc!pur-ee!uiucdcs!carey
From: carey@uiucdcs.CS.UIUC.EDU
Newsgroups: net.info-terms
Subject: Re: "Ultrasonic" hearing
Message-ID: <18800006@uiucdcs>
Date: Fri, 10-Jan-86 09:34:00 EST
Article-I.D.: uiucdcs.18800006
Posted: Fri Jan 10 09:34:00 1986
Date-Received: Fri, 17-Jan-86 02:32:58 EST
References: <1280@brl-tgr.ARPA>
Lines: 17
Nf-ID: #R:brl-tgr.ARPA:1280:uiucdcs:18800006:000:917
Nf-From: uiucdcs.CS.UIUC.EDU!carey    Jan 10 08:34:00 1986


/* Written  5:27 pm  Jan  7, 1986 by alw@mit-eddie.UUCP in uiucdcs:net.info-terms */
In article <1280@brl-tgr.ARPA> wmartin@brl-tgr.ARPA (Will Martin ) writes:
>                                 ... This sort of info might be used to
>force terminal designers to finally eliminate all that nasty high-pitched
>noise their products emit!
>
Hear, hear!

If you can't hear the nasty high-pitched noise emitted by most video
terminals, think about what this says about your sense of hearing in
the region of 15,570 Hz ...
/* End of text from uiucdcs:net.info-terms */
Sometimes the problem is not the frequency--subtraction between two frequencies.For example if the music you are listening to has frequencies say at 15,000 Hz
then subtraction of the frequencies will give you (15,570 -15,000=) 570 Hz.  
This is in the audible range.  I don't know how to calculate the loudness of
subtraction tones.  Does anybody else?