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Old 6th March 2008, 01:46 PM   #11
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Default Re: Re: Re: Advice: Dog Silencer Modification for enchanced range & intensity

Quote:
Originally posted by boukisan



That's exactly what I want to do - it's why I started this post. I really want to add onto the unit, because it already has the microphone to sense when they are barking - I just want to add range and intensity. More tweeters/watts.
So just find the input connections of the unit's output amplifier and connect (a buffer, if necessary, and) a power amp and some output transducers. Or, add multiple smaller buffer/amp units, each with its own transducer. Or maybe add a unity-gain power buffer to the existing final output, and add more transducers (with series & parallel sets of them, if necessary, to maintain same impedance as seen by amp unit). Or, add multiple smaller unity-gain buffers... You get the idea(s).

Since the signal is probably only just-above the audio range, you could probably do some initial 'proof of concept' testing by using an existing audio power amplifier, with some existing tweeters (or maybe with some piezo transducers, if handy, and compatible). It would probably help to know what frequency you're dealing with, in case it's too high for your amp/tweeter combo to be effective and that makes you think it can't work, when it actually only invalidated the test.

In other words, wait until the neighbors are gone and then take an audio power amp and speakers outside, point the speakers at the dogs from the closest-possible range, grab the signal from the commercial anti-bark unit and run it through your system, and see if the dogs 'react'.

Caution/disclaimer: You would AT LEAST want to make sure that the basic signal level was compatible with your amplifier. You would really need at least a cheap oscilloscope, to do that right. Also, certain 'bad things' might happen to your system. So only do this at your own risk, etc etc. I'd use some cheapo amplifier and speakers, if they're handy, instead of my main system. Actually, I'd probably just throw together a simple non-inverting chipamp-based power amp. One channel at up to 50 Watts is trivial, with chipamps.
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Old 6th March 2008, 01:55 PM   #12
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Thanks! That's a great starting point.
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Old 6th March 2008, 02:30 PM   #13
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I used a mic hooked up to a small mixing desk to give a visual indicator for the output. Sadly not before I fried the tweeters in some Technics 3 ways I was using at the time.

You can imagine the scene, cant hear any output so I turned the amp up, still cant hear it so it went up some more. Decided it wasn't working and put the music back on, wheres all the treble gone and whats that strange smell?

I've now got a chipamp running through FR125s that sounds way better than my old setup so I guess thats the silver lining.
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Old 6th March 2008, 02:47 PM   #14
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If messing-with the neighborhood dogs became my hobby, I might consider using a parabolic reflector, which could direct the ultrasound, and keep it focused. That way, you'd need less transmitted power to achieve the same effectiveness, and also might avoid causing as much discomfort for any 'good' dogs in the area.

Of course, THEN I'd probably want to have three or more bark sensors, far-enough apart, and a system that would calculate the location from which the barking originated, which would then automatically point the dish at the target location, transmit the signal, and then cease transmission when/if the barking stopped, or maybe after a predetermined period of time, otherwise. It might also be good to start with a low-power transmission, and use periodically-stepped increases of power until the barking stopped. If the terrain was not level, an additional bark sensor with some vertical separation would probably be needed. However, the system's already knowing resident dogs' expected locations should be able to ease the target-acquisition algorithms' burden, and would probably also enable simplification of the hardware configuration. (Such a system could easily also have the capability of recognizing each individual dog's bark signature, and remembering its expected location.)

Multiple simultaneously-barking dogs might seem to be a problem. On the other hand, that could also be thought of as 'a target-rich environment'. ;-)
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Old 6th March 2008, 03:27 PM   #15
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How about training the neighbors instead of trying to train the dog? Mount a loudspeaker system to blast Wayne Newton music into their bedroom. Set it up so it is triggered by the dog barking and stops when the dog(s) stop. The humans may get the idea and try to control the dogs, but maybe not. I've seen a lot of dog owner's who were every bit as dumb as their animals...

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Old 6th March 2008, 03:45 PM   #16
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I have thought of blasting them at night with loud music - they deserve it. I can be on the phone in the middle of the day, in the house, and the person on the other end asks why there's so many dogs barking. Seriously. These people think of themselves as 'dog rescuers' and they know exactly what the legal limitations are, and they go right to the edge of them.

It's two people, one is a nurse who is gone all day, the other is a retired guy who happens to be about 80% deaf. He can't hear the dogs, and he doesn't care.

The other neightbor's dogs are fine until my neighbor's kennel gets started - then it starts a chain reaction.

I've heard some of these signals are painful to dogs. (delightful) This device that I have mentioned sweeps through frequencies, audible and inaudible until the dog stops barking - then it stops. It immediately starts again when the dog barks, and so on.

Dogs are pretty smart - at least my (non-barking) dog is pretty smart. According to testimonies, dogs being trreated by this product tend to learn the pattern in a few days, and shut their freaking holes, which is nice, but I want to supercharge it.
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Old 6th March 2008, 05:34 PM   #17
gootee is offline gootee  United States
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Oh, you already have the device.

Have you tested it on the dogs, yet???! Results?
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Old 6th March 2008, 05:39 PM   #18
gootee is offline gootee  United States
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Quote:
Originally posted by I_Forgot
How about training the neighbors instead of trying to train the dog? Mount a loudspeaker system to blast Wayne Newton music into their bedroom. Set it up so it is triggered by the dog barking and stops when the dog(s) stop. The humans may get the idea and try to control the dogs, but maybe not. I've seen a lot of dog owner's who were every bit as dumb as their animals...

I_F
I've seen some of those types of people, too. And their dogs sometimes have them trained fairly well. :-)
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Old 6th March 2008, 09:10 PM   #19
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Quote:
Originally posted by john blackburn
MikeHunt79

The Mosquito emits 16Khz at 16db seemingly, mine emits much more than that! I used http://shmelyoff.nm.ru/ to create the file.

I cant hear it, but a friends 16 year old daughter who was used for blind testing couldn't enter the room it was in. It was only operating on tick over as well.
I guess it could also work as a child and adolescent repeller then.
Quote:
Originally posted by I_Forgot
How about training the neighbors instead of trying to train the dog? Mount a loudspeaker system to blast Wayne Newton music into their bedroom. Set it up so it is triggered by the dog barking and stops when the dog(s) stop. The humans may get the idea and try to control the dogs, but maybe not. I've seen a lot of dog owner's who were every bit as dumb as their animals...

I_F
Even better, have a mic setup, so it plays the dogs barks back to them, perhaps have a 5 second delay or something like that. Actually that may not be suck a good idea...
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Old 6th March 2008, 09:38 PM   #20
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Hmmm, a self-perpetuating dog bark escalator.

Maybe it could be like filtered with a slow delay (barks building on barks) - it could annoy the hell out of everybody. Sounds fun! I could do it on the weekend when everyone is home.
Put the speakers on the roof, and the mic at the fence...
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