In this work, the articulation of consonants m, n, n, n, l, l', and r in three distinctive quantities (Q1, Q2, Q3) was studied using static roentgenography, lateral cinefluorography, traditional and direct
palatography and filming of lip articulations synchronized with sound spectrography and oscillography.
This edition has chapters on vowels and
palatography, has been updated to match current terminology, replaces the Americanist transcription systems with the symbols approved by the International Phonetic Association, and has been adjusted for better pedagogical use.