We're getting a cat next week and we'd like to place the litter box in the cold room. There is just one catch: there is a super-loud dehumidifier running in that room and it would drive us crazy to hear that noise 24/7.
The noise is inaudible when the door to the cold room is closed, but when it is opened a crack the noise level is bad.
One option we're looking at is to install a cat door instead of leaving the human door open. I am afraid the cat door will reduce the noise insulation properties of the human door.
Another option I was thinking of is installing a spring that would slide the door closed, but I don't want the cat to get locked in the room.
Is there a way to soundproof a cat door so we can all be happy? Is there an better solution than installing a cat door?
Update: I found another option: https://www.youtube.com/watch?v=201ITM4ANno. I could leave the door open and cover the crack with acoustic blankets. Based on this video, the noise level should increase by 5 dB instead of 10 dB without the blankets. The cat should be able to step around the "curtain". Downside: this will look ugly.