Phonation As the vocal folds vibrate, the resulting vibration produces a "buzzing" quality to the speech, called
voice or
voicing or
pronunciation. Sound production that involves moving the vocal folds close together is called
glottal. English has a
voiceless glottal transition spelled "h". This sound is produced by keeping the vocal folds spread somewhat, resulting in non-turbulent airflow through the glottis. The vibration produced is an essential component of
voiced consonants as well as
vowels. If the vocal folds are drawn apart, air flows between them causing no vibration, as in the production of voiceless consonants. The glottis is also important in the
Valsalva maneuver. • Voiced consonants include • Voiceless consonants include ==References==