Some Sunday morning musings -
One of the things that has drawn me to older EM games (I was tire kicking a Genie when I was sucked down the EM rabbit hole) is that the individual games seem to have an an aural or sonic signature, based on the manufacturer as well as the individual game design (layout, scoring choices, etc.)
For instance, my Duotron has a lot of 500 point scoring, so you get a lot of ding-ding-ding-ding-ding, often punctuated by an occasional 1000 pt chime as the digit carries. Domino, similar (bells, not chimes, but lots of 50 point scoring)
#SkyRider, on the other hand, has no multiple chime scoring, but does have a spinner which has it's own signature sound. For whatever reason, the Williams chimes that were installed in this particular game when I bought it bothered me and I sought out / installed CC chimes (with lovely wooden resonator boxes) to restore the original sound.
And of course, the sound is going to depend on design / layout choices - how many pop bumpers or slingshots or scoring rubbers, places you can get a lot of rapid scoring, etc.
The times I've played the games without the chimes connected, just something missing. Similarly, I don't like to play without the glass because there's too much mechanical noise that the glass mutes somewhat. And part of the reason I seem to like Gottlieb EMs is the chimes and the sound design.
I imagine that someone visually impaired, and perhaps a bit more aware of or dependent upon sound than most of us, might be able to identify a specific game via scoring patterns. And I imagine that at least some part of the allure of a certain game is how it sounds, on top of visuals and gameplay.