Ultrasound and Insects

Ultrasonic Pest Repellents are used as substitute for Mosquito coils and liquids to avoid inhaling of toxic fumes. It is the Non toxic way to repel pests like mosquitoes. As per scientific information and experimental evidences, the animals respond to Ultrasound and avoid its presence. Small mammals like Dogs, Cats etc. responds to 22-25 kHz ultrasound and Rats to 60-72 kHz. Insects like Mosquitoes, Flies etc. responds to 38-44 kHz.

1.What is Ultrasound?

The hearing property of human ear is limited. Human ear can perceive sound with in a frequency range of 20 Hz to 20 kHz. The sound frequency below 20 Hz is Infrasonic sound and above 20 kHz is Ultrasonic sound. Human ear is not sensitive to Ultrasound because the eardrum cannot vibrate as fast as ultrasound. Ultrasound has high frequency, so the wave is very powerful. Ultrasound travel along straight line even in the presence of obstacles. When the ultrasound hits an object, it bends and round and spread in all directions.

2. What is the relation between Ultrasound and animals?

Even though human ear cannot sense ultrasound, many animals can produce and hear ultrasound. Many insects, rodents, bats and small mammals communicate through ultrasound. Insects have sensory structures to produce and detect ultrasound. Cockroaches have “Sensory hairs” to sense ultrasound. Spiders, Wasps, Beetles, Flies etc have a “Tympanic membrane” to detect ultrasound. Fleas communicate using high frequency ultrasound. Male Mosquitoes produce ultrasound to attract females. Female mosquitoes have sensory structures to receive ultrasound. Spiders, lizards also have ability to sense ultrasound.

3. How does Ultrasound affect animals?

The Ultrasound sensors are present in the Antennae of Mosquitoes and Genetalia of Cockroaches. Ultrasound emitted by the Repellent will scare away the pests and confuse them. Ultrasonic sound will create stress on the nervous system of insects and jam their own ultrasound frequency. This will immobilize the insects and they escape from the source of ultrasound.

4. Does the ultrasound pass through walls?

No. Ultrasound will not pass through walls like the ordinary sound waves. When the ultrasound hits an object,it bends and round the object and spreads.

5. How does ultrasound repel pests?

Ultrasound pest chasers are designed to repel pests from the home. Rodents respond to ultrasound with a frequency around 60 kHz. Cats and Dogs can be repelled using 22-25 kHz. Insects like mosquitoes, House fly, Fleas etc responds to 38-44 kHz. Ultrasound will create high pressure on the eardrum of Rats so that they move away from ultrasound source. Ultrasound generally creates stress on animals, so they avoid ultrasound.

6. How does Ultrasound repel Mosquitoes?

Male mosquito is the Natural enemy of female mosquito after breeding. Both male and female mosquitoes use plant juice as food. But female mosquito requires human blood protein for the maturation of their eggs. Male mosquitoes will not bite human beings. On the first day of emergence, the female mosquito will not bite but after mating with male it starts to bite human beings to get blood. Female mosquito will not allow males to mate again and they avoid the presence of males. Females detect the presence of males by sensing the Ultrasound produced by the males. If an Ultrasound generator is used, it will imitate male mosquito by producing 38 kHz ultrasound. This will repel Female mosquitoes. Moreover the ultrasound will create stress on the ultrasound sensillae present on the antenna of female mosquitoes, so the move away from the source of ultrasound.

Response of Animals to Ultrasound

1. 22-25 kHz Dogs, Cats
2. 38-44 kHz Mosquitoes, Fleas, House Fly, Spiders, Cockroaches
3. 52-60 kHz Lizards
4. 60-72 kHz Rats


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