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Ultrasonic Hearing in Humans: Applications for Tinnitus TreatmentMartin L. Lenhardt, Au.D., Ph.D. ProfessorDepartments of Otolaryngology and Emergency Medicine, Virginia CommonwealthUniversity, Richmond, VAInternational Tinnitus Journal, Vol. 9, No. 2, 2003Humans can detect ultrasound up to at least 100 kHz, but perception generally requiresdirect contact of the source with the body. Ultrasound sets the brain into forced vibration,and it is the brain oscillation that is detected on the base of the cochlea in normallyhearing individuals.