Do Ultrasonic Pest Repellers Work?

Answer

Ultrasonic pest repeller is an electronic device that emits high-frequency sounds and is meant to repel, injure or kill household pests like rodents and insects. It is quite a challenge to tell if this device works since studies investigating the efficacy of the device have shown mixed results. Tests by Kansas State University found out that the device was effective at repelling some insects like crickets and had little effect on cockroaches.
Q&A Related to "Do Ultrasonic Pest Repellers Work?"
They don't...period. They don't have range and they are not annoying enough to drive anything away. Pests adapt to
http://wiki.answers.com/Q/How_do_ultrasonic_pest_r...
Ultrasonic nebulizers are an inhalation method used to deliver medication into the lungs of a patient. The machines are meant for use by those who cannot use a hand-held inhaler.
http://www.ehow.com/how-does_4910918_ultrasonic-ne...
Short answer. : Ultra sonic humidifier uses ultrasonic waves to create a fine mist through cavitation in the water with a broken capillary wave at the water surface. Long answer.
http://www.quora.com/Physics/How-do-ultrasonic-hum...
I have heard they are all pretty much a rip-off. The prices run from $5 to hundreds of dollars. They emit a vibration and noise people can't hear. It might initially make the roaches
http://answers.yahoo.com/question/index?qid=200908...
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