OT Dealing with a nuisance dog

Reference for Hartmann whistle: Ultrasonic Engineering (With Particular Reference To High Power Applications), Crawford, Alan E: Butterworths Scientific Publications, London 1955 pp 115-121. There are some design equations.

I'll scan it if anyone is interested.

ROFLMAO!

Gunner

"War is an ugly thing, but not the ugliest of things. The decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth war is much worse. The person who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself."

- John Stewart Mill

I'd be glad to design it if you'd like to go that way, but those piezo horns won't produce nearly the level of ultrasound that you'd get with a compressed air whistle.

The amp needn't be an audio amp; a couple of MOSFET's driven by a

555 running off of a 12-volt battery would work fine. That's about all those piezo tweeters can take anyway. A compression horn or ribbbon tweeter can take more, but they're pricey -- and the elex would be more complex because you'd need a DC power supply of around 20 volts to deliver any appreciable power to an 8-ohm tweeter.

Another advantage to a whistle is that it is so small it would work nicely in a parabolic reflector. The result is much higher sound pressure level downrange because the sound is "focussed".

Those cheap spun aluminum light fixtures aren't good paraboloids, but they might work far better than nothing.

It looks like the whistle could be made out of 1/4" brass rod if you have a lathe.

They seem to be fond of cooking

Hmm. Broadcast or cable?

Kevin Gallimore

Hey that's a thought! You'd need a microphone and an oscilloscope to be sure you had the right frequency tho...

Get ultrasonic blaster @

it with a security light IR motion sensor (Home Depot)

Randy

Thanks , noted for possible future use. LOL, but that's not exactly the way I was thinking. My sis had a dog long ago that she named Pinche Perra and she told me that one time she was looking for the dog and going through a neighborhood calling its name and people where giving her dirty looks, like no wonder why your dog ran away.

It comes into your yard?? That makes it easy. Just put a suitable trap on your side of the line. When it gets caught its your dog to do with as you please.

Maybe rent a "professional". Do you have a cousin named Guido?

For a good paraboloid, use a discarded satellite antenna; plus point is that there's already a mount to hold the whistle at the focus point. Martin.

On Wed, 29 Dec 2004 15:47:30 -0800, "SteveB" calmly ranted:

Right, outside where every one of their neighbors can enjoy it barking hour after hour after hour. A barking dog should be a legal reason for either/or homicide/petocide, don't you think?

So you got rid of the bitch (and her dog?)

On Thu, 30 Dec 2004 08:32:23 -0600, "Rex B" calmly ranted:

It's time to think a bit more evilly than that, Rex. But don't get caught.

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Dog-a-pult? Nah, I shouldn't add to the dog murdering suggestions....

On Thu, 30 Dec 2004 13:13:34 -0800, Sunworshipper calmly ranted:

Complete with sprinklers which go on (accidentally watering the neighbor's yard, too) as the party starts and go off when the party ends? Bueno.

Try "Calma Su Chingando Perro Ahorita!" Close enough, eh?

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Ban SUVs today! -|- Full Service Websites

On Thu, 30 Dec 2004 17:42:50 -0600, Don Foreman calmly ranted:

Please do.

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This has been an outstanding thread. I might have to try some of the suggestions.

How can you be so lucky that you only have to listen to one dog. Our neighbors directly across the road from us have at least a half-dozen! They bark constantly during the day while the both of them are at work.

On weekends when the dogs are out and barking, the neighbors get annoyed with them and are constantly yelling at the mutts to shut up. I wonder if it has ever occured to them that we might also be annoyed. I don't go away in the daytime so I have to listen to the din constantly.

Orrin

I think it's a shame that the neighbors are behaving badly. Their dog is not the issue, it is the people who need to be corrected. I would not try to shoot the dog, that would be wrong.

My approach to this would be to invest in a large powerful sound system, and whenever the dog is barking I would play music to accompany him. Probably Frank Sinatra or maybe Bob Wills. I would do this at pain threashold levels.

Rudeness begats rudeness.

Jim

Friend named her car "Puta Betty" - it was only after her money.

On Thu, 30 Dec 2004 05:09:11 -0800, John Ings vaguely proposed a theory ......and in reply I say!:

remove ns from my header address to reply via email

OK. I have never seen one with a siren. 3Khz is actually quite a high sound, but OK, 3KHz-7Khz.

Anyway, none of them would bother getting up to ultrasonic IMO. It's just wasted bandwidth from a limited power source.