Emil Behnke (1836-1892) was a singing teacher, who developed his own system of training. He was a lecturer on vocal physiology at the Tonic Sol-fa College, in London. He was the first to photograph the larynx in action, around 1870. His works include: The Mechanism of the Human Voice (1881), The Child"s Voice (with Lennox Browne) (1885), Voice, Song, and Speech (with Lennox Browne) (1887) and Stammering: Its Nature and Treatment (1893). Это и многое другое вы найдете в книге The Mechanism of the Human Voice (Illustrated Edition) (Dodo Press) (Emil Behnke)