On 6/9/2010 9:50 AM, Kajikit wrote:
> On Wed, 09 Jun 2010 07:41:36 -0400, >
> wrote:
>
>> On 6/8/2010 9:41 PM, Cheryl wrote:
>>> "Nancy > 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/
>
> Interesting. I can clearly hear all the way up to 17khz and they make
> my ears hurt! I can't hear the 18khz tone. I just turned 39 and I have
> never liked loud music or loud noises...

If you have a good set of speakers you might be able to hear the high
frequency tones - however, most people won't be able to play the high
tones - their crappy computer sound system won't have the capability. On
my system, only the 12 KHz sounds like it might have a chance to be a
pure sine wave tone - the rest is all harmonic distortion and digital
distortions.