Auditory tube function in divers by auditory tube sonometry during valsalva maneuver.Okubo, Jin; Watanabe, Isamu; Ishikawa, Norihiko; Shibusawa, Mitsunobu; Edamatsu, Hideo; Teramura, Kimiko; Ishida, Hiroyoshi; Ohno, Fumio · Practica Oto-Rhino-Laryngologica · 1987