overstimulation question

hello i have sensory processing disorder and a family member i live with sensory seeks to help them regulate their sensory needs.

is it wrong to express a boundery each time they are loud or does this couse harm to them when they need to regulate their needs?Ii tried repetedly reminding them in a calm tone explaining the noise hurts and if its ok for them to be loud in a seprate room from me, but they turn the blame to me and become emotional and if I remove myself i still get very oversimulated and upset.

opinions appricated! thank you