According to the National Institutes of Health, people who are exposed to ultrasonic noise over time can suffer from nausea, headaches and migraines, ringing in the ears (tinnitus), and fatigue. 2 Plus cats and dogs can hear frequencies twice as high as humans can and ultrasonic sounds.
Safety concerns have arisen, too; some users have reported that the sound can weaken the clarity of telephone conversations, interfere with burglar alarm systems, and cause muting in hearing aids. The noise may also cause inadvertent distress to rabbits and rodent pets, such as guinea pigs and hamsters.
While the idea of using high-frequency sound to deter pests is intriguing, studies have consistently shown that these devices have limited to no impact on most pests, including rodents and insects.
In a room with mostly hard surfaces, like a kitchen, ultrasound will "bounce" around giving coverage that is more effective. The ideal placement would be one that allows the sound waves to cross in front of an entrance way.
A little more about ultrasounds
They are directional, so they do not pass through walls. They bounce off hard surfaces and fill the room with sound pressure. A single device can protect up to 46 m2. As they do not pass through walls, you may need to use more than one device.
How to Tell If Your Pest Repeller Is Working. 1. Reduced Pest Activity: One of the first signs is a noticeable decrease in pest activity, such as fewer sightings or droppings.
While cats and dogs can hear the ultrasonic waves, ultrasonic repellers do not generally harm or distress them. The sound being emitted would have to be rather loud to affect an animal as large as a cat or dog.
The smells of some plants, such as eucalyptus, wormwood and mint, are unattractive to rodents. Sound-based repellents are capable of emitting sound at a register too high for humans to recognize.
Ultrasonic pest repellers emit frequencies above the threshold for human hearing (above 20 kHz) in an attempt to scare off pests without bothering your ears. Imagine walking into a home and hearing a loud, high-pitched tone playing incessantly—you'd probably walk right back out.
Some common disadvantages of conventional ultrasonic sensors include limited testing distance, inaccurate readings, and inflexible scanning methods. All of these drawbacks, however, can be mitigated and even overcome with the right NDT tools and techniques.
Many studies confirmed the appearance of sub- jective symptoms of exposure to noise emitted by ultrasonic devices like dizziness, balance distur- bances, tinnitus and fatigue [4, 23]. It is assumed that those symptoms result from the effect of noise on the vestibular system; however, further studies are necessary [12].
In conclusion, the perceived connection between ultrasonic pest repellers and WiFi interference is largely a myth. Through a comprehensive examination of the underlying science, research findings, user experiences, and expert opinions, we have debunked this common misconception.
For over 40 years, there have been reports of hearing threshold shift [1] and a range of subjective effects (nausea, dizziness, migraine, fatigue, tinnitus and 'pressure in the ears' [1]–[8]) from ultrasound in air to which workers have been routinely exposed (plus other symptoms that have not occurred in more than one ...
According to the producer, the most effective frequency range lies between 10 and 12 kHz for birds, between 20 and 30 kHz for rodents, and between 30 and 40 kHz for insects.
These sounds are supposed to be alarming to mice and discourage them from settling or feeding in affected areas. However, the sound emitted by these repellents cannot pass through walls, and furniture may limit their range. Data on these tools show little to no effectiveness.
Irish Spring soap is not likely to keep mice away from your house– and the strong fragrances could even be attractive to them. Rats & mice might initially be deterred by the overwhelming odor, but after a while they'll get used to it, and may even take a nibble to test it as food.
Are Ultrasonic Pest Repellers Safe and Reliable? Typically, ultrasonic pest repellers are considered safe for pets since the high-frequency sounds they emit are generally beyond the range of human hearing and pose no harm to dogs and cats.
The strong scent of peppermint is overwhelming to mice. Similarly, essential oils such as eucalyptus oil, bergamot oil, clove oil, and cinnamon oil are potent in keeping mice at bay. One study noted that eucalyptus oil applied once a day was more effective as a rat repellant than once a week.
It could also harm your dog in a different way - it can instill fear and confusion, which can lead to a whole host of other behavioral issues such as anxiety and fear-based aggression.
Usage NOTE: Use Ultrasonic Pest Repeller in an average size room, one unit per room. The Ultrasonic Pest Repeller is simple to use. It operates on any standard 110 volt wall outlet. Simply plug it in. The red indicator light on the front of the unit will blink on and off to let you know that the unit is working.
What is the most effective mice repellent? In our experience, the most effective mice repellent is the Rodents Away Odor Free Pouches. But if you're looking for the easiest DIY treatment to use, you can go the ultrasonic pest repellers route with the LONAOO ultrasonic repeller.
3. Sonic Repellents. Ultrasonic devices are claimed to emit high-frequency sounds that are too high for humans to hear but are just the right frequency to drive pests, including mosquitoes, away. The trouble is, there's no proof that they work.