On 6/8/2010 9:41 PM, Cheryl wrote:
> "Nancy Young" > wrote in message
> news:xaCPn.24674$U64.5654@hurricane...
>
>> You know there is something they call Mosquito, along those lines,
>> it's a high pitched sound they have used in areas where young people
>> congregate ... supposedly adults can't hear it but it drives
>> the younger people nuts. They leave the area. Higher frequencies are
>> the first to go as you age, they say.
>>
> I've heard of that mosquito thing, but never heard it. Hmmm.
>

Good summation here and some test tones:

http://journal.plasticmind.com/ears/...ure-a-youngun/




>> I don't think I have the best hearing, at all, but I never had any
>> trouble hearing it on the tv shows where they demonstrated it,
>> so who knows.
>>
>> nancy
>