The article probably also fails to mention that peer-reviewed scientific tests of this concept prove it to be useless. <a href="http://www.ncbi.nlm.nih.gov/pubmed/2906666">http://www.ncbi.nlm.nih.gov/pubmed/2906666</a> cjl <div class="gmail_quote">On Fri, Jul 8, 2011 at 1:34 AM, James Cameron <<a href="mailto:quozl@laptop.org">quozl@laptop.org</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> The speakers don't work very well at the frequency range specified by that article for mosquito repelling; 45 Hz to 67 Hz. The article fails to mention how much sound is needed; e.g. in dBm. It gives a subjective measure only. Other articles on the site mention secrets of ancient geometry and crystal harmonizers. This really doesn't impress me. Is there any evidence base for repelling mosquitos using low frequency sound? Is there any evidence that enough of the population of mosquitos is repelled? All it takes is for one strain to not be repelled and it will breed up. -- James Cameron <a href="http://quozl.linux.org.au/" target="_blank">http://quozl.linux.org.au/</a> _______________________________________________ IAEP -- It's An Education Project (not a laptop project!) <a href="mailto:IAEP@lists.sugarlabs.org">IAEP@lists.sugarlabs.org</a> <a href="http://lists.sugarlabs.org/listinfo/iaep" target="_blank">http://lists.sugarlabs.org/listinfo/iaep</a> </blockquote></div>