One of the best ways to avoid having to groom a large, noisy dog, is to train him not to bark. But, even then, some dogs simply do not know how to stay quiet. This can especially true if the dog likes to play, as he is just as likely to see grooming as just another form of play. The trick is to take all of that noisy energy and channel it into making each grooming session fun for both of you. Keep in mind that you should be grooming your dog on a weekly basis or more often if needed. You should also check with your vet to see how often your dog should be bathed.
Keep in mind that just because you don't mind the sound of your happy hound's barking, the rest of your family might get a little frustrated, not to mention your neighbors. Your best bud is just trying to let everyone know just how happy he is, and barking is the only way he has. He might also be just a little bit anxious around the grooming tools you will be using. This will go away as he gets used to being groomed, as long as you take care to get him comfortable with the process.
When you have a noisy pooch, the best way to keep him quiet during grooming time is to tire him out and give him something to occupy his mind while you are working. Keep working with your pup and make the entire process fun. It's a great time for both of you to bond with each other.