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strangerep
Science Advisor
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There are many on the market. Try Googling "dog ultrasonic".zoobyshoe said:Got a link to one of these? Sounds like what I need.
This is just one example of the handheld variety:
https://www.amazon.com/dp/B000IBRI2Y/?tag=pfamazon01-20
but there are several others. Shop around and check the decibel rating of each -- the louder the better.
Have a read of the reviews though. Sometimes they don't work as well as advertised (especially the ones that are on all the time, or claim to be bark-activated automatically).
Also, very old dogs might not hear it and extremely aggressive breeds (which have been trained to be vicious) might just carry on regardless. But I found it works against every "normal" dog I've encountered.
The wall-mounted version at that link seems to be battery powered and claims to work by sensing a barking noise and then activating. I don't think either of these features are good enough though. I recall finding one a long time ago that was powered off the mains (you might need an electrician to install it), and activated by RF remote control. You might need to spend some time Googling more extensively.
Alternatively, if you have some electronics skill, it's very easy to open up a handheld version and arrange for its battery terminals to be connected instead to a suitable transformer powered from the mains (but don't try this if you're not "electrically qualified"). I used an X10-based device to do the remote control (basically just a home automation product that could turn a particular power point on and off). There's probably newer version around now.
HTH.
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