I find that children really incorporate what they see at home, although this may not be the case with you. I am on the loud side, and so is my oldest one. My husband likes to repeat things to get the point across, and I see our younger one repeating things like he does. In my older years, I have chosen not to be embarrassed by the behavior of anyone, whether it be my husband, children, friends or mother. It could help if you stop feeling this way.
Most people are kind and understanding.
Those who would look down on this situation are judging themselves, in my opinion. Start by taking the charge out of it, meaning letting go of its effects on you. I love taking walks and bubble baths, closing my door and putting on some soft music and lighting candles. I know that when I take time to de-stress, I can handle things so much better. Being calm and centered could really diffuse much of this.