Try reading this. It talks about ultra sound devices for dogs and a DIY water spurter.

http://www.buzzle.com/articles/how-to-keep-dogs-out-of-your-yard.html

How to Keep Dogs Out of Your Yard

At Amazon http://www.amazon.com/Motion-Activated-ULTRASONIC-ANIMAL-REPELLER/dp/B00281NGAU

for BIRDS

Bird-X BG Balcony Gard Ultrasonic Bird Repeller

The Australian Electronics Magazines have had a series of Ultrasonic Barking Dog articles over the years.

Here's a recent one: http://www.altronics.com.au/index.asp?area=item&id=K4500

see

http://archive.siliconchip.com.au/cms/A_112942/article.html

and

http://www.siliconchip.com.au/Issue/2012/October/Wireless+Remote+Control+For+The+Barking+Dog+Blaster

If you need help to assemble it, send me a PM.

my further research on the subject (from airport protection studies) indicates that:

- there currently is little research data on the subject of the effects of ultra low sound on birds and pidgeons in particular

- the frequency for pidgeons should be in the range of 0.2 to 7 KHz

- the required sound intensity is high (>80 dB in the effect area, so probably around 110-120 dB one meter away from the device)

@jackflash: is it possible to build such a device?

0.2 - 7kHz will drive you and your neighbours up the wall, that frequency range is slap in the middle of what we can hear.

damn, I might have misread some stuff then!

edit: no, the range is correct - I guess it is the range for normal hearing of the pidgeon, not the infrasound frequency they can hear. need to research the correct low frequeny

Edited April 3, 201313 yr by manarak

The Australian Electronics Magazines have had a series of Ultrasonic Barking Dog articles over the years.

Here's a recent one: http://www.altronics.com.au/index.asp?area=item&id=K4500

see

http://archive.siliconchip.com.au/cms/A_112942/article.html

and

http://www.siliconchip.com.au/Issue/2012/October/Wireless+Remote+Control+For+The+Barking+Dog+Blaster

If you need help to assemble it, send me a PM.

my further research on the subject (from airport protection studies) indicates that:

- there currently is little research data on the subject of the effects of ultra low sound on birds and pidgeons in particular

- the frequency for pidgeons should be in the range of 0.2 to 7 KHz

- the required sound intensity is high (>80 dB in the effect area, so probably around 110-120 dB one meter away from the device)

@jackflash: is it possible to build such a device?

0.2 - 7kHz will drive you and your neighbours up the wall, that frequency range is slap in the middle of what we can hear.

damn, I might have misread some stuff then!

edit: no, the range is correct - I guess it is the range for normal hearing of the pidgeon, not the infrasound frequency they can hear. need to research the correct low frequeny

ok, according to wikipedia, I should have been referring to Hz instead of KHz. So a device is needed that produces infrasound at frequencies below 10 Hz.

hmmm:

http://www.newscientist.com/article/mg21729006.200-turn-up-the-bass-to-scare-birds-away-from-planes.html

building instructions:

http://www.designbuzz.com/build-infrasonic-subwoofer/

Frequency below 10 Hz?? How about an elephant?

I could have used that kind of device when I lived in Toronto! I havent seen a pigeon in years! I hate those dirty birds! I love Phuket!

Get the gf cranked up about something. That might do it.

Or her mother. That will definitely do it.

Frequency below 10 Hz?? How about an elephant?

no elephants nearby

does anyone know where I could have such a device built?

Edited April 4, 201313 yr by manarak

I doubt very much that you need Infra Sound.

Firstly, a speaker which can generate a reasonable amount of noise below 10Hz is going to be huge.

The lower the frequency, the larger the size. Think of the huge bass speakers at a rock concert.

And those probably only go down to about 50 Hz or so.

Secondly, it is myth that humans can't "hear" Infra sound.

We may not be able it hear via standard laboratory tests using headphones, but we can certainly feel it via chest cavity resonances, etc.

Infra-sound will drive your neighbors batty.

Thirdly, I very much doubt that pigeons can hear it, their bodies are just too small to capture any significant level of Infra-sound energy.

On the other hand, most small animals (and insects) respond strongly to Ultra-sonics.

Edited April 5, 201313 yr by jackflash

>> the frequency for pigeons should be in the range of 0.2 to 7 KHz
>> the required sound intensity is high (>80 dB in the effect area, so probably around 110-120 dB one meter away from the device)
>> @jackflash: is it possible to build such a device?

Is it possible to build such a device?

Yes it certainly is possible, but it is going to resemble the speaker stack at a Rolling Stones concert.

I doubt it would be very practical on your balcony.

There are two approaches to repelling birds and other animals.

(1) If you record (and play back) the alarm call for that particular species, it will often cause them to take flight.
It doesn't have to be particularly loud, but it will be audible and probably rather annoying to humans.

(2) By using Ultra-sonics, you (hopefully) can generate a tone that humans can't hear, but the nuisance animal can.

If it's sufficiently loud and "percussive" it just might cause the animal to flee. Or at least shut up for a while.

Your best bet woulld be to record some Pigeon alarm calls and play them back on your boom-box. It might just work.

Edited April 5, 201313 yr by jackflash

(1) is proven not to work on pidgeons, on not too long, they quickly learn the noise is meaningless.

(2) pidgeons do not hear ultrasounds.

I am trying method (3): sell the house, but the pidgeon shit gets in the way :-(

(1) is proven not to work on pidgeons, on not too long, they quickly learn the noise is meaningless.

(2) pidgeons do not hear ultrasounds.

I am trying method (3): sell the house, but the pidgeon shit gets in the way :-(

You could always start a pidgeon shit business

Just start writing some articles in health magazines that it has some big advantages, and turn pidgeon shit into gold.

(1) is proven not to work on pidgeons, on not too long, they quickly learn the noise is meaningless.

(2) pidgeons do not hear ultrasounds.

I am trying method (3): sell the house, but the pidgeon shit gets in the way :-(

You could always start a pidgeon shit business

Just start writing some articles in health magazines that it has some big advantages, and turn pidgeon shit into gold.

guano actually is a big business

guano actually is a big business

Oh! I thought that was just chicken sh1t!

Sent from my jelly bean!

In Florida we string clear fishing line up very high in the seagulls flight path and they quit coming around. Sometimes it takes a bit of criss crossing but the lines are clear so not bad esthetically allowing you to unload the house for a decent price, hopefully, before the birds figure it out.

Sent from my Nexus 7 using Thaivisa Connect Thailand mobile app

Edited April 10, 201313 yr by asupeartea

Getting from fresh bird sh1t to saleble guan no might be a bit unhealthy. I suggest surgical masks or gas mask with a little fan mounted on top to help keep you safe and cool at the same time. Funky looking but......

Sent from my Nexus 7 using Thaivisa Connect Thailand mobile app