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Posted by Steve King on 06/13/06 19:24
"Neil Smith [MVP Digital Media]" <neil@nospam.com> wrote in message
news:1ett82hmijol7e0m8s1imnla2hr08h6rgq@4ax.com...
> On Mon, 12 Jun 2006 21:11:48 GMT, "Steve Guidry"
> <steveguidry1@earthlink.net> wrote:
>
>>Not a broadcast 1khz tone generator. I've got one of those . . .
>>
>>I need one that will generate an 18khz pulsating tone, ala the "mosquito"
>>device that's so popular with Welsh shopkeepers.
>>
>>Any ideas on where I can get one of those ?
>
> TheRegister story today has a link to the BBC website which has an MP3
> http://www.theregister.co.uk/2006/06/12/ringtone_adults_cannot_hear/
>
> Cheers - Neil
> ------------------------------------------------
> Digital Media MVP : 2004-2006
> http://mvp.support.microsoft.com/mvpfaqs
It appears to be a 15 kHz tone modulated +/- 150 Hz at a rate of 1 kHz. I
was amazed that I could hear it just fine with monitors at normal level.
Steve King
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