Best frequency for rejecting bats

[Osvaldo de Banfield]

Anyone with experience making non-hi-fi audio devices for reject bats (and or other plagues) from the ceiling, perhaps can help me about which frequency range is the best, and how much power density (Watt/m²) are necessary to get rid from this kind of beasts.

Any help will be appreciate.

 

[rsavas]

Let me suggest to record their sonar on an oscilloscope to figure out the frequencies involved and give it back to them. I do not know about the levels that are required, but could record your device and compare to what a bat are putting out. Or do a Goggle search.

 

[rayma]

Apparently there is a wide range, 20kHz to 100 kHz. Maybe a warble tone, or even a square wave.

 

[Osvaldo de Banfield]

rsavas: interesting point. I would try it. Many thanks to both.

 

[lcsaszar]

Pictures, please!

 

[mchambin]

Interesting.
Let me know, we have a mango tree regularly devastated by fruit bats.

 

[rsavas]

I was watching on the news last night, the bats up here are being devastated by a white nose fungus, started in the east and is spreading west, in BC they are trying to get it under control by using some transferable /spreadable fungicide? I do know that there are insect and fruit eating bats, their poo is different too, one for veg the other for flower
Also on the ones around here, the teeth look mean but they can not break/puncture the skin, they were using rubber gloves to catch them. Bats 101

 

[vinylkid58]

I was watching on the news last night, the bats up here are being devastated by a white nose fungus, started in the east and is spreading west, in BC they are trying to get it under control by using some transferable /spreadable fungicide?

Pretty sure they are treating the bats with a special bacteria. If they don't get this under control, the fungus could wipe them out.

jeff

 

[rsavas]

yeah i got that wrong ... thx i hope it works. We used to have lots of bats in the back yard coming out at dusk, now that I think of it, I do not see as many of them around, another tragedy unfolding, is man to blame?

 

[vinylkid58]

another tragedy unfolding, is man to blame?

Probably, we seem to be screwing everything else up. Ask Monsanto how many bees die every year.

jeff

 

[tapestryofsound]

Please leave the bats alone, thank you.

 

[rsavas]

The scientist did say the result will be more insecticides. It is like the Asian Ash bore, our area is littered with dead and half dead large trees. I lost 2 big ones on my lot, they cost $1000.00 just to drop. I said to the arborist, what! you guys bring them over here to make work for yourself? he did did not know what will happen once they devistate all the ash trees. Dooms day express.

 

[lousymusician]

The 'bat repellers' used in the warehouse of the food processing plant where I worked did not emit tones, they made clicks that apparently confused the bats' echolocation and dissuaded them from taking roost. Of course a sharp click contains a whole spectrum of HF energy, you don't need to pick one frequency.

Bill