As per scientific information and experimental evidences, the animals respond to ultrasound and avoid its presence. Small mammals like Dogs, Cats etc. hate frequencies around 22-25 kHz US and Rats to 60-72 kHz. Insects like Mosquitoes, Flies hate frequencies around 38-44 kHz.
Ultrasound: Some studies have shown that high-frequency sounds (ultrasound) can be effective in killing or repelling certain insects. For example, certain ultrasonic devices are marketed for pest control, claiming to drive away pests like rodents and insects.
Bugs hate the smells associated with repellency, such as lavender, citronella, vinegar, peppermint, and geranium. These oils are considered a natural way of driving away bugs from your home without harming you, your family, and other animals.
The Pest Control Repeller uses sound waves to repel pests from your home. The different sound frequencies (20 to 40 kHz) prevent pests from getting used to the pulses and staying in your home. It's the safest and best alternative to chemical repellents, poisons, and traps that can harm people.
Insects listen to, detect, and locate sound-producing predators, hosts, mates, and rivals, and they emit sound to attract, repel, or threaten members of their own species and to startle and evade predators.
In a study, scientist have recently proven that certain electronic music can keep mosquitoes away (at least temporarily), stop them from biting you, and even stop them from multiplying. It's already a known fact that insects react to the sound waves produced by music.
Among the many orders of insects, hearing is known to exist in only a few: Orthoptera (crickets, grasshoppers, katydids), Homoptera (cicadas), Heteroptera (bugs), Lepidoptera (butterflies and moths), and Diptera (flies). In the Orthoptera, ears are present, and the ability to perceive sounds has been well established.
Frequency Range: The frequency range you mentioned, 20-60 kHz, is indeed known to act as a pest deterrent for certain pests like rodents and insects. However, generating high-frequency sounds in this range typically requires specialized electronic devices or ultrasonic transducers.
UHF-4 Band - A major band break for the UHF band is between 400 and 420 MHz which is used by many eavesdropping devices. UHF-5 Band - The next band break for the UHF band is between 420 and 450 MHz. The band is quite popular with a great deal of usage around the 433 and 434 MHz.
Pronounced avoidance responses (negative phonotaxis) of swarming mosquitoes were observed in the range of 140–200 Hz. Most of the mosquitoes left the area above the attracting sound source within one second after the onset of the test signal.
Bugs naturally are attracted to vibrant colors such as orange, yellow, or white. Colours such as blue and green will not register as vividly when viewed in the ultraviolet spectrum, which deters bugs away from those colored items.
Some plants, like lavender, marigold, citronella grass, rosemary, and basil, naturally repel bugs. Lavender is particularly popular as a natural, people-and-pet-safe pest control plant. The aroma of lavender is too strong for small insects and discourages them from flying near the area.
While these devices are safe for humans, there is still no proven evidence that they actually work. Ultrasonic pest repellers are advertised as a safe and environmentally-friendly option to keep pests out of your home, but we still get a lot of questions about them.
Electronic cockroach repellent supposedly works by emitting ultrasonic, or very high frequency, sound waves. This noise is supposed to cause response which can confuse, and may even kill, certain pests like cockroaches.
Some common signs of a room being bugged include unexplained interference on electronic devices, strange sounds or voices, and suspicious objects like hidden cameras or microphones.
The frequency range of RF signals is generally between 300 kHz and 300 GHz. It is widely used in radar and wireless communication. RF-based eavesdropping attacks are an attack method that uses radio frequency signals to listen to other people's communications or obtain sensitive information.
A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and police investigations.
Unlike bait traps, which capture pests where they are, ultrasonic repellent is used to drive pests away. Ideally, the high-frequency sound will make the pests abandon the area, leaving you pest free. The good news is that this sound is at a frequency above human hearing, so it's not distracting or annoying to humans.
Termites mortality was 100% both at frequency 300 KHz and frequency 500 KHz and both in 30 minutes and 60 minutes irradiation time.
Ultrasonic wave is defined as “inaudible sound with high frequency for human” the frequency of which generally exceeds 20 kHz.
As per scientific information and experimental evidences, the animals respond to ultrasound and avoid its presence. Small mammals like Dogs, Cats etc. hate frequencies around 22-25 kHz US and Rats to 60-72 kHz. Insects like Mosquitoes, Flies hate frequencies around 38-44 kHz.
These singing insects are cicadas, crickets, grasshoppers and katydids, the males of which produce loud calls in their search for a female mate, according to the University of Florida(Opens in a new window). The sounds produced by these insects may just sound like a loud din to you, but each is unique to its species.
Indeed, insects are capable of nociception, so they can detect and respond to injury in some circumstances [3]. While observations of insects' unresponsiveness to injury warrant further research, they ultimately cannot rule out insect pain, particularly in other contexts or in response to different noxious stimuli.