An acoustical device for emphasizing formant components of vowels as well as the temporal/spectral components of consonants. With an ample 2" internal diameter and a radius dimensionally compatible with Grade 3 students. The Vowel-O-Phone has a mouthpiece lip to retain the personal hygienic cover (20 ea.supplied) with easy insertion and removal for each student. Replacement hygienic covers are available 20/pack.