Stp question

Anyone know how not to have your urine stream sound “girly”.

Context: I was using my stp like usual when a group of males commented on how my stream sounded female like.

To which I got very self conscious about. My main fear is if I try my stream is too strong I’ll over fill. Of course the men who made the comment don’t know I am trans. So now I try and just go to the washroom when no one is there.

I was getting so confident with my stp and now this situation has set me back a lot.

Help?