Consonant sounds can be either voiced or voiceless. All vowel sounds are voiced. The vocal chords vibrate when making voiced sounds. All vowels and some consonants are voiced. The vocal chords do not vibrate when making voiceless sounds.
Some consonants are voiceless.
Vowels Tongue Height. Refers to the position of the tongue in reference to the roof of the mouth when making vowel sounds. Tongue Height can be high, mid, or low. The tongue is positioned high, near the roof of the mouth, to make these sounds. These sounds are produced when the body of the tongue is positioned in the mid section of the mouth, somewhere between the roof of the mouth and the bottom of the mouth.