KillerLag 3 points 4y ago
There are some devices, although they are normally meant to be worn (Sunu band or the Buzz clip). If he was to get more than one, he would need to find a method to customize the noise, otherwise they would make the same noise, which would not help with orientation.
Would something like a mechanical clock (like a ticking clock) help? He can hear it as it gets closer, and it would get louder as he gets closer. Some of my clients also use a radio at low volume as well to help locate specific things.
Another technique is carpeting on the floor. Using different types/textures of carpet to identify specific rooms.