Switch on the small, gray metal box and listen: A sharp, pulsating, high-pitched tone burrows into the ear like a power drill bit, prompting an agitated, please-shut-that-blasted-thing-off grimace.

Live in a place where mosquitoes harass you to no end? Maybe you want to take a break from the chemical repellents! Try driving away mosquitoes with ultrasonic waves. I had seen them on mobile phones ...

Rather than using conventional mosquito repellent this summer, you might check out Brando's Mosquito Repeller with Frequency Adjuster. The device emits an ultrasonic sound which can only be heard by ...

Making your own insect repellent sounds so simple: Just whip up a mixture of apple cider vinegar or witch hazel plus a few drops of some herby essential oils—no deet required. But there aren’t a lot ...