“…The S-sound is the most difficult sound, not only in the German language. It has the smallest physiological range, and its formation can be influenced by numerous factors (Krech, 1969;Arnold, 1970;Bohme, 1974;Wangler, 1976;Weiskopf, 1976Weiskopf, , 1981Habermann, 1978;Weinert, 1982). Therefore, the exact factor registration is a necessary prerequisite for the therapy of relatively frequent difficulties in the pronunciation of the S-sound.…”