Phoenix Network Forums

This program produces sound in the range of 16000hz to 20000hz which beyond the audible range of humans. pets and other animals ca though hear the same.

this sound produces an undesirable efect on mosquitos and others pests thus restrtains them from flying.

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found this one, seems interesting. anyone tried this?i also found similar programs for cellphones. the site is in, i dont know mandarin, anyways, heres the dowload link if you want to try:

http://www.yongun.com/cgi-bin/main.cgi/ ... squito.exe

pugrit wrote:.....This program produces sound in the range of 16000hz to 20000hz which beyond the audible range of humans. pets and other animals ca though hear the same....

possibly my Creative GigaWorks 750 (20Hz-40kHz) will give such frequncy with necessary output power but the most part of other audio systems are not able to do that coz they usually have 20 Hz - 18kHz(20kHz) and i suppose that without needed output (((

I've tried it. Maby I'm a dog or something but when the prog was working there was some sort of noice in my speakers . Also I've seen a Nokia cell phone with such software and the owner ot the phone told me that it works!

The sound nearly can't be noticed by humans, but that doesn't mean it's not there. If you are exposed to that noise for too long, then this could seriously damage your eardrum. It's the same with invisible light. Infrared light can't be noticed by humans, but it can well damage your retina. By the way, invisible waves have been used as weapons by the military for decades, such as microwaves, sonic waves and light.

i think that explains it.i usualy log in late at nigh wher ethis not too many noise. i notice a slight tone..i guess im a dog too. heheheheh

I'm curious though...

Although the program is capable of producing those tones, can the average speaker/headphone produce at that frequency? (Not an audio guy but I'm just wondering.)

FLuXx wrote:Although the program is capable of producing those tones, can the average speaker/headphone produce at that frequency? (Not an audio guy but I'm just wondering.)

Sure, most modern speakers can produce frequencies up to 48 kHz. A human notices up to 10-12 kHz in average.

banderlog wrote:

pugrit wrote:.....This program produces sound in the range of 16000hz to 20000hz which beyond the audible range of humans. pets and other animals ca though hear the same....

possibly my Creative GigaWorks 750 (20Hz-40kHz) will give such frequncy with necessary output power but the most part of other audio systems are not able to do that coz they usually have 20 Hz - 18kHz(20kHz) and i suppose that without needed output (((

With regard to the hearing ability of mosquitoes, in both males and females, the antennae are resonantly tuned mechanical systems that move as simple forced damped harmonic oscillators when acoustically stimulated. The best frequency of the female antenna is around 230 Hz; that of the male is around 380 Hz, which corresponds approximately to the fundamental frequency of female flight sounds.

If the resonant frequency of their antenna is between 230 and 380 hz, most likely they cannot hear a darn thing outside that range. And further, the last time I looked, the mass of their antennae are quite small, which would therefore require enormous amounts of sound pressure to produce unpleasant and disorienting sensations in their little mosquito brains.

Therefore the best strategy is to produce a steady 230 Hz tone at approximately 120 - 130 dB, as measured at the tip of the mosquito antennae.

This would make the female mosquitoes believe that there was one friggin huge girl mosquito in the area and stay far away. Be careful not to produce any harmonics in the 380Hz range or you would likely attract every female mosquito for a five or six kilometer radius.

(It may be advisable to wear hearing protection while operating this device to avoid permanent hearing damage).

wow. informative.
i think the program needs tuning though. i could still see mosqitoes around.esp late at night...