What's the frequency ?

[bianchi77]

Guys,

What's the frequency for anti rat,mosquito, spider and fly ?
Any infos will be appreciated,

Thank you

 

[jayanth.devarayanadurga]

Maybe Ultrasonic.

 

[vyomax]

Guys,

What's the frequency for anti rat,mosquito, spider and fly ?
Any infos will be appreciated,

Thank you

Its in ultrasound range.
Small mammals like cats and dogs sensitive to. 22 to 25KHz
Insects like mosquito and flies to 38 to 44KHz rats to 60 to 72KHz.

You need special high frequency tweeters to produce such sound.

 

[bianchi77]

can you show me a high frequency tweeters you're talking about ?
thanks

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can I use a normal 8 ohm speaker ? or it can not reach those frequencies ?

 

[FvM]

FYI https://web.archive.org/web/20030202193901/http://www.ftc.gov/opa/2002/08/lentek.htm

 

[bianchi77]

can I use this one ?
**broken link removed**

 

[BradtheRad]

For purposes of experimentation also consider a unit like this for $1.25:

 

[vyomax]

can you show me a high frequency tweeters you're talking about ?
thanks

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can I use a normal 8 ohm speaker ? or it can not reach those frequencies ?

NO!!!

simple speaker only capable up to 20KHz frequencies....
It is designed for that purpose only.

If you want to build any Mosquito repeller or insect repeller, You Need Ultrasonic Buzzer/Tweeter.

Just google with "Ultrasonic Buzzer" "Ultrasonic Tweeter" "Piezo electric Buzzer"

You will Find LOat of Them.

 

[FvM]

Some of the said ultrasonic transducers have rather small bandwidth, e.g the 24 and 40 kHz types suggested in recent posts. So you should know if their operating frequencies are of any use for the intended application. High frequency speakers, including the popular (although rather ineffective) piezo tweeters don't range much above 25 kHz. Small electrostatic transducers are probably the most promising candidates for wideband ultrasonic.

In my view, it's a different thing to know that animals can hear certain frequencies, which can be usually read from zoological or physiological text books, and to claim that effective acoustic repellers can be made. The quoted FTC/Lentek case should at least raise some scepticism.

 

[mathespbe]

https://www.quantumbalancing.com/mosquito.htm

Try above link...

 

[bianchi77]

how about :
https://www.aliexpress.com/item/Free-shipping-20pcs-lot-RT-fission-ultrasonic-transceiver-transducer-probe-diameter-16-mm-IB125/1123663929.html

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How about rat, cockroach, fly and spider ? what's their main enemy in nature ?
thanks