Wait, those high frequency sounds in Tokyo are teenage repellents? I thought they are bird/insect repellants. I could hear the sounds and was literally getting mini headaches walking around.
They're extremely annoying, aren't they? I was the only one that could hear them out of 5 people in my group, all aged about 35, and they definitely caused me to avoid walking by that shop. Hell, I would have avoided ever buying anything there if I were a local.
Yes you can even adjust the frequency based on which demographics you want to keep from loitering. There is a predictable hearing loss curve for the highest frequencies. You could set it to 20kHz to keep little kids away, or even go as low as 16kHz if you want to keep everyone younger than about college age away. This also happens to be an easy way to test the degree of your own hearing loss compared to your age group.
leoxiong|1 year ago
stavros|1 year ago
ipnon|1 year ago