mosquito anti-loitering device from Chinatown back in 2010
“Dear PoPville,
Twice when I’ve walked by a particular house, there is a repeating, high-pitched beep that kills my head. This sound is on the east side of New Hampshire Ave NW, just south of 16&U. I can’t find any mention of it on the inter webs but it’s terrible and certainly does not help post-work headaches on the commute home. My best guess is it’s a mosquito device–an anti-loitering device that emits a sound only young people can hear, except I’m probably too old to hear that noise. Any ideas?”