Improved reversal sounds have been invented - the classic beep isn't just bad from a noise pollution perspective, it's also an artificial sound that's difficult for people to process and determine its point of origin. There's been a gradual rollout of white-noise reversal beepers, which while they might seem strange are easier for people to locate aurally - as a result they can be played at a lower volume, and even if it was played just as loud is a much less unpleasant tone.

Of course it'll probably be many years before old-school beepers are phased out.

Tom Scott video for reference: https://www.youtube.com/watch?v=fa28lIGuxq8