[BC] interesting audio

[Mike McCarthy]

I'm 44 and can easily hear 15 Khz sync whine.  There are some stores I walk 
into and can't stand the ultrasonic alarms they have running.  Painful.

Also, there are some locations which specifically install that type of 
emitter where they don't want kids loitering.

MM

At 02:23 PM 6/12/2006 -0700, JD Davis wrote
>I'm 41 and I can still hear it! WOO HOO!
>
>Lotus Broadcasting
>James "JD" Davis
>IT Manager
>-----Original Message-----
>From: broadcast-bounces at radiolists.net
>[mailto:broadcast-bounces at radiolists.net] On Behalf Of Barry Mishkind
>Sent: Monday, June 12, 2006 12:50 PM
>To: Broadcasters' Mailing List
>Subject: Re: [BC] interesting audio
>
>At 12:18 PM 6/12/2006, Mark W. Croom wrote
> >Looks like something like 15khz tone, though I'm sure you have a story
> >to tell--some kind of odd oscillation you found in a piece of gear or
> >something.
>
>A Ring Tone Meant to Fall on Deaf Ears
>By PAUL VITELLO
>For classrooms where cellphone use is forbidden, students have found a ring
>tone that many adults cannot hear.
>
>http://www.nytimes.com/2006/06/12/technology/12ring.html?th&emc=th
>
>
>
>
>
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