The elderly in particular use a cat-deterrent in their garden. It is a
small apparatus with a speaker attached to it. It produces a
high-pitched bleep of more than a 100 decibel. The sound is mostly
only audible for children, youngsters and people with ears that are
still good. Many cat-deterrents use the same noise as the Mosquito.
The sound causes pain in the ears, headache, migraine, and ringing in the ears?
Who can tell me more?
Working Mosquito: 17KHz-20KHz 90dB
Working Cat Deterrent/Animal Chaser: 16KHz-23KHz 130dB