The American R
The American R is like a vowel because it does not touch anywhere in the mouth. In Korean, Japanese, Spanish, Italian, Greek and many other languages, the R is a consonant because it touches behind the teeth. The American R is produced deep in the throat. Like the French R and the German R, the American R is in the throat, but unlike those two consonant sounds, it doesn't touch. Let's contrast two similar sounds: [ä] and [r]. Hold your hand out in front of you, with your palm up, like you are holding a tray on it. Slightly drop your hand down, and say ah, like you want the doctor to see your throat. Now, curl your fingers up slightly, and say [r]. Your tongue should feel in about the same position as your hand.