Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!texbell!vector!telecom-gateway
From: unicorn!martin@trout.nosc.mil
Newsgroups: comp.dcom.telecom
Subject: How Were Telephone Sounds Chosen?
Message-ID: <telecom-v09i0340m04@vector.dallas.tx.us>
Date: 31 Aug 89 23:39:57 GMT
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X-TELECOM-Digest: volume 9, issue 340, message 4 of 10


     I am interested in finding literature references on how the various
telephone sounds, e.g. dial tone, busy signal, and the decaying tone
associated with credit card calls, were chosen.

What kinds of psychoacoustic research were done to determine that these sounds
are easily remembered, easily discriminated in noise, or less annoying than
other sounds which could have been selected.  I am looking for references on
how these sounds were selected.

Thanks,
Doug Martin
martin@nosc.mil