Not medical, but there is a book: https://www.onassholes.com/

I’ve noticed in my own car’s forums that over about ten years, most of the loud-seekers moved on to other cars while the remainder of us have much more diversity of gender and ‘loudness’ interests. Our sample size of self-nominated participants is also a couple thousand, not at all restricted to undergrads, and anecdotally parallels the study: those who seek loudness uniformly present as men, and in large majority tend to treat prosocial-community responses with disregard, hostility, or mockery. So, this study tracks :) but that doesn’t excuse the sampling bias of business-degrees (a field of graduates which includes corporate executives and daytraders, neither particularly well known for their social concerns), nor the self-selecting and anecdotal nature of my own separate experience. Perhaps we’ll see a wider study someday.

Self-reported data via an internet survey. Garbage science means garbage data. I wouldn't put any faith in these results. You can't swing a dead cat in a room full of business students without hitting a bunch of sadistic psychopaths anyway.