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Myth: New devices that emit high-frequency sounds can repel mosquitoes. Fact: “There is no evidence that wearing devices that emit sound will repel mosquitoes,” say Day and Rutledge.
MYTH: Sonic devices drive away mosquitoes by replicating the frequency of their wing beats.
"They don't work," said Jonathan Day, professor of medical entomology at the University of Florida. And there's no scientific reason they would. Mosquitoes aren't good listeners; they hunt with olfactory and visual cues.
"Sound plays no role in predator avoidance or host seeking," Day said.
* You can repel mosquitoes with electric devices that emit high-frequency sounds.
FALSE – Scientific studies have yet to conclude that electronic mosquito repellents that emit high frequency sounds keep mosquitoes away or prevent them from biting. You may test this technique to see if it works for you, but beware of this fact before making any large purchases on electric devices.