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From: lloyd!sunfs3!kent@husc6.harvard.edu (Kent Borg)
Newsgroups: comp.dcom.telecom
Subject: Re: Locatable Ringers
Message-ID: <telecom-v09i0428m02@vector.dallas.tx.us>
Date: 2 Oct 89 23:01:18 GMT
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In article <telecom-v09i0414m03@vector.dallas.tx.us> Kenneth_R_Jongsma@cup.
portal.com writes:

>With the traditional bell, it is possible to be in any one else's
>office and tell if your phone is ringing based on the volume and
>direction of the bell.  With these new ringers, it is impossible to
>tell where the "warble" is coming from, even though you are only one
>office away. There seems to be no way the ear can attribute direction
>to the "warble". Hence, every time a phone rings, everyone runs to
>their office to see if it is for them.

I remember the old Bell Telephone exhibit in the Museum of Science and
Industry in Chicago had en explanation of the how they chose the ring
of the phone.  All I remember was that is it could be heard by most
everybody because it had a rich set of harmonics.  They showed a scope
trace of the machanical bell, a jumble of lines, and the trace of a
sin wave, which was just a clean up-down pattern (couldn't see the
curves at their horz timing).

I don't remember whether they mentioned is was easy to find in a
crowded office.  Too bad all new phones seem to have gone backwards in
this aspect.


Kent Borg				"Then again I could be foolish
kent@lloyd.uucp				 not to quit while I'm ahead..."
or					     -from Evita (sung by Juan Peron)
 ...!husc6!lloyd!kent