As an Amazon Affiliate, we may perhaps receive a smaller Fee from qualifying buys but at no further Price to you personally. Find out more. Seem waves are over and above the number of human hearing, commonly all-around twenty kHz and higher, but They are really in the hearing variety https://pawpressnews.com/best-dog-deterrent-device-for-dogs-the-ultimate-solution-for-bark-control-and-training