Greetings:

I am interested in building an ultrasonic dog whistle that is powerful enough to reach about 200 feet. I have a neighbor dog that will not stop barking and I would like to be able to "push a button" and emit a 150db plus 20-25 khz signal that would cause him to stop barking. If possible, I would like to be able to adjust the frequency so that I can find the optimum "spot". Any advice, idea or direction would be greatly appreciated.

Wayne (W3HXI)

 

Quite a distance , might get the dogs attention but would put your teeth on edge up close.
Conventional tweeters are not really up to this but you could try an electrostatic discharge speaker should work at 40+Khz

 

Thanks; Well I was going to try and use an outdoor speaker and hide it in the trees aimed at the house.. I will research the speakers you suggest. Any ideas on what to drive it with? I saw an 555 timer going into a small speaker so I would need to amplify it some and drive it into a larger speaker. Thanks again, Wayne

 

Found a speaker. What is the price for it??? Don't have a clue, but I think that might be good for your project!

http://www.avisoft-saslab.com/usg/playback.htm

:lol: :lol: :lol:

__________________
I will never live old enough to see all the new technologies!!!

 

I have no advice on the project you propose but...

Would this "dog whistle" be on most or all the time or only when he/she barks? In any case, it may be wise to consult the neighbor to whom the dog belongs to and get him/her to take action on the dog, you can easily involve the police if nothing is done at no charge to you. If this speaker is for the dog to stop barking, it may be possible that one of the neighbors' use for this dog is for protection, ie; bark in the case of an intruder or wild animal (a reason why my family has a dog). In this case, the neighbors' are pretty much screwed if you build this whistle behind their back and, in the unlikely and unwanted event, a burgler or animal does enter their property.

If this is not the case, please disregard my comments.

Ivan C.

 

it might make the dog bark more

 

lol, wouldnt that suck. :P

 

I have to presume that your reference to 150 db level is at some point a few inches or feet in front of the speaker (transducer). That's an awful lot of energy if based on normal reference levels. In my engineering handbook artillery is listed at 120 db and a Saturn rocket at 200 db. I think what you really mean is "really loud."

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stevez

 

"150db plus 20-25 khz signal that would cause him to stop barking"
and probably give you permanent hearing impairment

 

Thanks folks for all of your comments; the ultrasonic device will only be activated upon the dog barking; I am not trying to harm the dog in anyway and understand that 150 db may be "overkill literally", so maybe 120 db is more appropriate. I also do not want to loose my hearing but want to make sure it makes the 200 plus feet to where the dog is.

Has anyone seen a commercial unit or instructions on building a unit that could have variable output volume? Thanks again,

Wayne

 

Chuck it a biscuit,
it cant eat and bark.