Conflicting needs- what’s reasonable?

Hi, advice needed!

I recently joined a social group for autistic people at my university, the first meeting was more enjoyable than I anticipated but I really struggled with one of the participants who had a loud voice. While I don’t want to expect other people to have to mask a lot in this situation, I definitely felt uncomfortable and found it quite overwhelming. 
Would it be reasonable to ask the organisers if they could speak to this person (who has been going for longer than I have/seems to have a good rapport with the organisers/staff) and ask them to lower their voice? I feel like an ass asking them to moderate themselves in a group like this but equally I’d really like to keep going (I have very few friends my own age) and don’t want to snap at them by accident.

(please note I don’t think I’m the only person who felt a little like this, several other people also became more open/talkative after they left)