You're trying to frighten away birds that are flying in the air so putting the repellers on the ground seems counter-productive anyway. The closer they are to the ground the more “clutter” there will be break up the frequencies. Read Also: What're The Best Pigeon Repellents? Whatever you do, don't put them down on the ground even if the directions state that you can.
This will bounce the sound waves back into the open area in front of the device. Place the repellers against a solid wall or large tree trunk. Then, when the birds fly into the “trigger zone” they'll be hit with different noises and flashes of light from two different directions, all of which are out of sync with each other – creating that undulating, alternating noise that will drive the birds crazy. Set them up so their range overlaps by about 2/3's but far enough apart that they won't be triggered at the same time. A lot of their success hinges on the placement of them and how many are being used. The anecdotal evidence seems to be about 60%-40% in favor of ultrasonic repellers working. So anecdotal evidence is actually very good, solid evidence that can certainly be considered. In civil trials, the verdict often hinges on what is called the “preponderance of evidence” standard, and it can be enough to justify handing out fines of tens of millions of dollars in some cases. When considering the weight of anecdotal evidence, remember this is the same sort of evidence that is admissible in a court of law to find someone guilty or not guilty of a crime beyond a reasonable doubt. What little research has been done is almost anecdotal itself.Īnecdotal evidence is the evidence from first-hand, eyewitness testimony of people who have used the devices at their home or business and can tell you what happened to them. They claim studies have been done but when you dig into it, there aren't any rigorous studies. There are some articles on university websites that talk about repellers, usually denigrating them, but we've noticed they rarely quote any actual studies. In other words, it's time-consuming and expensive.Ĭonsequently, very little research of this type has actually been done. The research to acquire this sort of evidence requires a great deal of time and money to conduct. Scientific research evidence is the evidence which has been collected in rigorous, carefully planned studies which should take place under controlled conditions, or at least in conditions where all the possible variables have been accounted for and taken into consideration. There are two kinds of evidence to consider in trying to answer this question scientific research evidence and anecdotal evidence. Limited Time: Save $50 off your pest control service.
The following video is a short review on a particular ultrasonic animal and bird repeller. Birds are very skittish anyway and the unexpected nature of the explosive noise and light adds to their fright, alarming them into flying away. It crosses the line where the sensors can detect their presence and suddenly, all you-know-what breaks loose. The bird approaches thinking everything is fine. The combination, alternating back and forth, should prove to be more than it's worth to the birds and they'll seek shelter somewhere else.Īnother thing to note is the motion detection sensors most repellers have had added to them of late. Many ultrasonic repellers also add flashing LED strobe lights and sonic (i.e., humanly audible) sounds as well. Basically, that's what is supposed to happen to birds as they approach the ultrasonic repeller, the sound is intended to be so annoying they tuck tail and run – or fly, as the case may be. Imagine it getting worse as you get closer and closer to your destination. If you haven't, click on the link above and you'll see what we mean.Īfter only a few moments you want to clap your hands over your ears and hit “stop” to put an end to the caterwauling of those things.īut imagine not being able to stop it. If you've ever heard one of them, you know they're incredibly annoying. Moreover, many repellers will use alternating sounds, going back and forth much like a European police siren. The same thing holds true with ultrasonic repellers. You may have heard how dogs will howl when a dog whistle is blown (also outside of human hearing) because it hurts their ears. This is outside the normal audible range for human beings but well within the audible hearing range for many animals and insects. They emit a high-frequency tone or noise, usually in 15-20 kHz range and above. The idea or concept behind ultrasonic repellers is actually quite simple.
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Solve your pest problem right now Connect with a local pro today How Do Bird Ultrasonic Repellers Work?