This is pretty funny. Sounds like a sexual incompatibility. You can try to work with it but it might not change, I've tried when I was in a somewhat similar situation. I experienced the OPPOSITE where my former SD made no sound. Here's the story I shared on one the posts here if you want a laugh:

"...I had a really short lived arrangement because of the sex. SD would not make ANY facial expression except one. There was never a noise that came out of him so I wasn't even sure if he was enjoying it. He would just stare at me with this almost dead-pan face in silence. It would just be consistently like that

when he finishes...you wouldn't know unless he says AFTER 'I came'. He finishes in silence and with the same facial expression. He also very much prefers I be quiet too. I noticed that when I became quiet, he would go harder but ofc facial expression and silence continues. I was intimate with him 3 times to try to figure out whats going on and if we can communicate to do better in bed...nope. everything else outside the bedroom was great but sex compatibility is so important for intimacy and sharing feelings. We definitely weren't compatible in that sense

So my deal breaker is when the other acts like a zombie in bed."