the vocal chords, the place in the throat from which a loud voice comes (see Molina)
Alonso de Molina:
tzatzatzia. la olla dela garganta, oel gritadero. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 151v. col. 2. Thanks to Joe Campbell for providing the transcription.