One of my neighbours has one of those 'ultrasonic' animal scarers in their front garden, I assume to stop cats and foxes.
They are elderly, so most likely have hearing loss at higher frequencies (almost everyone does past the age of 30 or so) and are probably unaware that some people, myself and my children included, can hear the noise the animal scarer makes.
It's a very unpleasant, high pitched tone, which can be heard for quite some distance. My eldest son in particular finds it very uncomfortable.
It's lucky for them that I can hear the noise, as if I couldn't, I would have no clue why they were reluctant to go near that house and complaining about loud noises!
Varying our route to avoid walking past this house is not an option - avoiding it would mean walking quite some way in the wrong direction. We go past this house twice a day on the school run.
WIBU to pop a note through the door to tell them their animal scarer is scaring my children?