Synonyms:
vowel, vowel_sound
Meaning: a speech sound made with the vocal tract open
Usage examples
This once accomplished, tests can be made with sounds of different kinds, different pitch, and different volume, varying the distance, the instruments, and the vowel when the articulate sounds are reached.
But I have found that sometimes, in cases where the sound perception was not at first sufficient to enable the child to distinguish even the most dissimilar vowel sounds, although uttered loudly close to the ear, I could awaken the attention of the child to sound, and stimulate the dormant power by the use of an Acousticon.