Here's a cool concept that will have you tuning in to your radio without worrying about being sucked dry by mosquitoes. Outdoor magazine Go Outside has partnered with a Sao Paulo radio station for this "Repellant Radio" campaign to add a 15 khz frequency sound to its normal music program.

The show airs between 6 p.m. and 8 p.m, which is usually the time when mosquitoes go on the prowl. Thanks to the 15 khz frequency (which humans can't hear), they won't go anywhere near you as long as the volume is up. The reason is that the frequency mimics the sound of a dragonfly, which happens to be the mosquitoes main predator. The marketing campaign was such a hit that it recently won the Grand Prix in the Radio Lions contest as part of the Cannes Lion festival.