I would mention it in your advertising, and when you speak to men enquiring about a booking on the phone etc.

Also, make sure your bed is on the opposite/internal wall, and try playing some music?

All my incalls are in hotels so keeping noise relatively low is a constant issue. I have music on quietly in the background, more to drown out the sounds from other people walking past outside and from housekeeping staff etc.
 
Clients have very strict instructions about how to arrive for a booking as quietly and discretely as possible and most remember this on arrival and continue to be fairly quiet.

Just occasionally someone will turn up and have a booming voice. I immediately tell them (with a smile and a wink) that they have a lovely strong voice but that they will need to keep it at a lower volume than usual so that no-one outside the room can hear how much fun we're having together.

Of course there's no accounting for what sounds come out of a man's mouth for those few seconds when they hit peak pleasure elsewhere and rational thinking flies out of the window. Just occasionally, despite their best efforts the other 99.999% of the session, there can be stadium level roars, moans that sound like someone's operating on them without anaesthetic, and gasps as if they've just had a bucket of ice thrown over them. Nothing I or they can do about that really 

I have one reg who, bless him, just cannot be quiet. He has poor hearing. I joke about putting a pillow on his face have done it. He has no issue with this and thinks it’s all
Fun and games.

I find if I talk quietly they tend to follow . If that doesn’t work, may I suggest a ball gag? I use it as a half-jokey threat and they seem to get the message.

My new place is very quiet and my bedroom backs into a communal hallway .
Just had it soundproofed best thing ever !

How did you get it sound proofed? Sounds like a good idea for some.

I cover their mouth if they make too much noise when they come. Depending where l am of course.

Many men are thick. You tell them not to knock your hotel room door and that you will open and let them in. Many still fuckin knock and shout Hello and Nice to meet you as they come in.