hearing my wife through a wall is its own weird specific thing... anyone else process this

M41 / F38, ls 5 years. weve done same room a lot, separate room a lot. but theres one specific subset i want to talk about because no one writes about it. separate room. thin wall. i can hear her. specifically her. not loud sex sounds in general, HER sounds. the noises i know from 16 years of marriage. and she's making them because of someone else. this is its own emotional thing that is different from watching her in same room and different from just knowing she's with someone in a totally separate house. its this middle place where i have her sounds but not her body, her voice but not her eyes. its intensely intimate and intensely distant at the same time. its hot, mostly. but its also lonely in a way thats hard to describe. like i can hear her happiness but i cant participate in it, im next door with someone else. ive talked to her about this and she gets it bc shes felt the same hearing me. but neither of us have heard anyone else articulate this specific psychological experience. is this a known thing. does it get easier or harder over time. is it actually a sign that we should choose either fully same room (we participate) or fully separate location (we dont hear) and not do this middle thing. or is the middle thing the whole point and the discomfort is part of the value