I thought it was from our house, because it’s all around the house. It’s like someone twanging a low note on a guitar and leaving it like that. Like a distant ship horn but lower and fairly constant.
We live in a very remote area. It started maybe a year ago. Older people can’t hear it but young ones can. It can be heard in nearby hamlets.
It happens all times of day and night.
We don’t have any factories nearby or industrial estates but do wind farms, a village and a quarry.
Help!!