Is the “Mosquito” Teenager-Repellent Device “Degrading”?
I don't know what to make of this report about a controversial device used to repel teenagers and children by using a high-pitched frequency only young people can hear. The mosquito works by emitting a pulse at 16-18.5 kilohertz that switches on and off four times a second for up to 20 minutes. It emits an irritating, high-pitched sound that can...