High Frequency Audiometry in Presbycusis: A Comparative Study of the Mabaan Tribe in the Sudan With Urban Populations

Consulting Ear Surgeon at The Mount Sinai Hospital and at The New York Eye and Ear Infirmary, Associate Clinical Professor of Otolaryngology, College of Physicians & Surgeons, Columbia University (Dr. Rosen); Hals-Nasen-Orhen Klinik, Medizinische Akademie, Düsseldorf, Germany (Dr. Plester); Professor at Ein Shams University, Cairo, Egypt (Dr. El-Mofty).