Comment on Device for high-frequency sounds to prevent loitering by teenagersComments−kljensenOP16yI enjoyed scrolling to the bottom to listen to the different sounds the device can produce. The disclosed age/frequency pairs seem remarkably accurate and, of course, the sound is quite annoying.
Comments
I enjoyed scrolling to the bottom to listen to the different sounds the device can produce. The disclosed age/frequency pairs seem remarkably accurate and, of course, the sound is quite annoying.