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Q: Bat elimination using sonic device ( Answered,   2 Comments )
Subject: Bat elimination using sonic device
Category: Miscellaneous
Asked by: marinero_joven-ga
List Price: $10.00
Posted: 10 Dec 2002 21:09 PST
Expires: 09 Jan 2003 21:09 PST
Question ID: 122849
I recently ran across an ad (on the internet) for getting bats out of
my attic by using
a small sonic device that plugged into 120 volts and only cost about
$30 U.S..  I can't seem to find this device now. The ad also stated
that it would not bother my dog. This is the only method I care about
using.  Can you help??
Subject: Re: Bat elimination using sonic device
Answered By: clouseau-ga on 10 Dec 2002 22:21 PST
Hello marinero_joven,

Thanks for an interesting question. 

I have always doubted the effectiveness of these devices and thought
it would prove to be interesting research. I searched for  -
ultrasonic bat repeller - and discovered the following sites and

"Ultrasonic 500 Pest Repeller
 The new revolutionary Ultrasonic 500 Pest Repeller has produced an
innovative breakthrough in pest and rodent control. The ultrasonic
sounds produced by this unit usually affect animals such as mice,
rats, and bats. Simply plug the unit in. Recommend placing another
unit on the opposite side of the room to increase coverage and
eliminate "Sound Shadows".

Designed to repel mice, rats, and bats. 

Each unit covers a 500 square foot area.
ETL and CE approved
Plug unit in to an unobstructed wall outlet. Coverage in room can be
improved by bouncing sound off of reflecting objects, such as walls,
cupboard doors, and appliances, etc. This ricochet pattern will
increase effective coverage. Will not affect pets and appliances. The
ultrasonic waves may affect rodent pets such as hamsters, gerbils and
rabbits. Position the unit in areas away from rodent pet and it may
not cause discomfort for the pet..."

BR4004  Ultrasonic 500, 3 pack (1.3#)   $17.95


I found an interesting paragraph at the Victor Poison Free page for

"Can ultrasonic sound waves be effective in repelling bats from attics
and other inside areas?

Sonic Technology Products makes no specific claims regarding the
effectiveness of the PestChaser in repelling bats because the way bats
respond to high frequency sound can vary significantly depending upon
the time of year. Between December and June, bats are roosting and
hibernating. They will not leave their nest, even if you introduce
high frequency sound. They give birth to their young in mid-February
and will absolutely not abandon them, no matter how noxious the sound
is to them. The only time high frequency sound produces a repellent
effect is from July through the end of October, after their young have
flown off and before they roost again for the winter. In our view,
bats are extremely beneficial and their habitat should be protected.
Bats are the single best controller of the insect kingdom. Bats may
eat as many as 600 mosquito-size insects in an hour. An average size
bat colony may eat 1/2 million insects in one evening."

Their device is $19.99 and can be ordered on this page:


Electronic Pest Control at has two devices on
sale at $39.95 and a deluxe model for $49.95. Although they do not
mention bats specifically, they seem similar to other devices that do
claim to repel bats. You might email them if you like their design.


At Safe Home Products we find a higher end model:

Transonic IX-L: Repels All Pests 
Banish Pests with Sounds They Can't Stand
Versatile Ultrasonic and Sonic repeller for: 
Small animals (raccoons, skunk, squirrels) and Deer 
Rats & Mice 
Spiders, fleas, ticks & other flying or crawling insects 

"Psychoacoustic Jamming" Electronic Solution: Intense, variable pitch
ultrasonic and sonic sound waves repel pests. This noisy, hostile,
dynamic sound environment is intolerable to pests, yet friendly to
pets, humans and the environment.

Continuous, Maintenance Free: Up to 2000 square feet of easy pest
control. Use the 110vAC adapter, a 12 volt battery, or optional
cigarette plug attachment.

Customizable Controls for your Infestation: Different settings repel
different pests. User-friendly controls on the back let you choose
frequency, mode and speaker direction. On some settings, humans can
barely hear the sounds.

This device sells for $94.50


As I am suspicious of the effectiveness of these devices, I checked a
few pages on bat control to see how they thought ultrasonic bat
rellers fared.

"Ultrasonic devices do not repel bats for long, so why use them? Try
loud, heavy metal music. "

Hmmm, interesting thought.

I was also truly surprised that there were not more of these devices
for sale on the Internet. I checked several other search engines and
found the same hits as these plus one device for $475, but I thought
that too pricey to mention. So, I am afraid this is the selection the
Internet presents for ultrasonic bat repellers.

I trust this will lead you to the device you saw previously or an
appropriate substitute.

Good luck repelling the unwanted critters.


Subject: Re: Bat elimination using sonic device
From: ocean-ga on 11 Dec 2002 07:45 PST
I wouldn't buy it.  There are some insects that make high pitched
frequency to counter act the bat's sonic radar (like radar jamming,
sending out fake noises) but the bat just ends up changing the pitch
of his call and is not bothered by it a great deal.
Subject: Re: Bat elimination using sonic device
From: owain-ga on 13 Dec 2002 11:10 PST
Depending on your location, bats may have legal protection. All
British bats are protected by the 1981 Wildlife and Countryside Act.
This means that bats and their roosts are protected from harm and
interference. Under the 1981 Act it is a criminal offence for anyone
without the permission of English Nature, intentionally kill, injure,
handle, or photograph a bat (except where flying outdoors), to keep a
bat (although sick or injured bats may be kept until ready for
release) or to disturb a bat or its roost. English Nature must be
notified about any operation likely to disturb bats or their roosts,
and must be allowed time to advise on how to minimise disturbance to
the bats.


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