Hi, A.. Well, there's nothing you can do about the nasal part of how he expresses himself, but if you can stop the whining, you can cut down on the nasal thing.
I understand what you mean. I have ADHD, and certain sounds drive me insane. Here's where you and your son have to adjust to each other.
Whining is a kid's way of wearing down your resolve, your committment to the word "No." So when you say no, you always have to mean no, and you have to stick to it. Otherwise, if the kid knows that with enough whining, you will cave in, he or she will whine and tantrum as long as necessary to get his or her way.
A firm "No" when a kid starts to whine has to be enforced. Then you have to let the kid know that this whining is disrespectful (the 1-year-old doesn't understand this yet, so be gentle), and it may require a time-out. A minute or two is enough for a child that young. It's going to take him some time, though, so be patient until he learns that this is not acceptable. In the meantime, be patient and understand that this is a learning process.
Whining doesn't mean he doesn't love you or that you're doing something wrong. Everyone has to deal with this at some point in childrearing. You're not alone.
Teaching a child to respect your rules and to act with good manners is a long process, with new challenges at each stage. You may have to put him in another room while he cries and whines so that you don't have to hear it and you can stand firm.
Somehow, you need to find a way to communicate that #1, what he wanted is unacceptable, which is why you said no to it, and #2, that whining to try to change your mind is also unacceptable.
You might try to keep the whining from happenning in the first place by substituting the thing he wants, which is not good for whatever reason, with something that is OK at the moment. That way, he's getting something he needs, but inside of your rules. That way, your rules look a lot nicer to follow.
And remember, remember, remember, he's only a year old. He doesn't get a lot of the stuff we would all like him to understand. However, remember that he's been observing you for a year, and he knows how to press your buttons, too. So he's wise in some ways, but has a long way to go in others.
Peace,
Syl