I think there comes a point in time where you have to accept and embrace the things you can't change.
But more importantly, how are you so sure that it's your Adam's Apple that "clocks" you? I don't want to dishearten you but it could be something else, but because you are concentrating on your adams apple, you are more concentrated on the fact that it might be just that.
My psychologist told me a while back that there will ALWAYS be incessantly and insanely critical people who will clock you based on some arbitrary detail, and the only thing that can be done about these people is to just ignore them and move on, because in the end those people don't matter. I've honestly gotten use to the fact that I more than likely instantly get clocked by everyone I meet, but I've taught myself to simply be me and not worry. Most of the time I'm responded with respect, and people gender me correctly whether they believe i pass or not, simply because my presence or behavior suggests that saying "sir" or laughing would be highly inappropriate.
Granted, not all of them do; but I don't pay attention to the naysayers or the ones who laugh. If anything, i make it awkward for them by blowing them a kiss or laughing even LOUDER and sarcastically... they usually look away in discomfort. If it happens that its impossible to remove, then its just gonna have to be something you embrace and just get use to... People who are aware and who are respectful wont even care, and the less YOU notice, the less others will notice as well. We have this annoying ability to cause attention to ourselves and the things we hate by focusing on them, and it causes others to also focus their attention to the very things we hate about ourselves. It's not an exact science, but its something I've noticed over the last few months.
Try not to focus so much on the things you don't like about yourself because people can sense that energy and it only draws more negative attention your way. And as Ducks said, remember that you are doing this for no one else but you, so F what people think or say or do. They don't have even the most minimal amount of strength that it takes to do what you do, they laugh because they wish the had the ability to say "F the world, I am me" but they don't, and laughing is the only way they can make themselves feel better right before they go home and cry themselves to sleep about it. Sorry

I'm kind of a bitch about people who live in the illusion of normality.