kloKKed
Completely Consentual
You sound like you have a cold. That's the only dead give-away. I used to be able to to this, but I've found that I have an awkward pitch now that I smoke and hit puberty.
I've been told this only once before. Might also be my mic but who knows.
You'd have to hear me speak for awhile. I also include female mannerisms and stuff which are what sells it. But I will admit it's not perfect.
I wouldn't be able to tell if I didn't REALLY look for it though.I applaud you, sir.
You could just pull the collapse nasal-pathway/allergies string. It is common enough for someone to accept a nasaly voice without much suspicion.