The Relationship Between Sounds and How They Are Produced

In English the vowels are AEIOU and the consonants are everything else. Vowels are basically speaking where we make a sound with an opal vocal tract so that there is no buildup of air pressure at any point above the glottis. This contrasts with consonants where there is some sort of constriction or closure. We can modulate these sounds by using our lips, by using our teeth or by using our tongue and its position in the mouth. And we can also modulate them I guess through changing the air itself and how that's produced and the volume of and so on. But what he wants to do here is just touch on a few of the key terms