New subject: [linux-audio-user] Create high-pitch noises like the mosquito device

31 Mar 2007

On Sat, 31 Mar 2007 02:27:48 +0200
Fons Adriaensen &lt;fons(a)kokkinizita.net&gt; wrote:

...
  On Fri, Mar 30, 2007 at 03:40:55PM -0800, Tim Howard
wrote:

  On 3/30/07, listreader
&lt;listreader(a)lupulin.net&gt; wrote:  
  >I saw the mosquito device that will annoy
younger
 >people, but not older people:
 > http://www.compoundsecurity.co.uk/teenage_control_products.html
 >
 >Its pretty expensive.  How would I begin to create that
 >from scratch?  Can a sound-card generate those frequencies?  
 As pointed out by Tim below, it shouldn't be expensive.

 This thing seems to be targeted to people with enough
 money and holding strange opinions. To quote the web page:

   "Anti social behavior has become the biggest threat to
    private property over the last decade and there has
    been no effective deterrent until now."

 As if you could solve this by a 'deterrent'. If I were
 an "anti-social teenager" I'd keep my iPod earphones in
 place and be immune to this gadget. The even more anti-
 social would probably use a paint spray to disable the
 thing in seconds. I wouldn't blame them for doing so. 
A really astute teenager (with a rich lawyer daddy) might successfully
sue the owner/user of the device for assault.

-- 
Will J G