White noise maker

One of the things I got used to as a kid was having a vaporizer or humidifier running almost every night. When I got older and didn’t need it, I missed the white noise it made, so I bought an air freshener. The problem with the air freshener was the horribly expensive filters I had to buy. So I went years without one, until I heard about a white noise maker that you can buy just for that purpose. My wife bought one and we’ve loved it.