That kind of thing would turn my day into a zero productivity day. You have every right to be annoyed and those dark murderous thoughts you’re having are completely valid. (Unless they’re disabled and need those sounds of course).
If he’s disabled and needs the sounds, then they go through the headphones he’s already wearing. Not out into the general office
Which is likely 99.9°% the case here, but what if those headphones aren’t playing music and instead being worn to dampen other office noise as they have a sensory issue? I like to give people I don’t know the benefit of the doubt before deciding that they’re just a selfish inconsiderate twat. But they’re very likely just a twat.
Accomodations for your disability in the work place, while completely valid and necessary, shouldn’t get to interfere with the accomodations needed for any other person in that office. If the noise is constant and loud, that probably ruins it for at least one other office tenant with a different disability.
His noise goes through his own headphones, or a non-noise related cue is found to give him the same kind of feedback he needs, to give him what he needs while not interfering with anyone else’s equally pressing needs
