title: Phase audiometry--a rapid method for detecting cerebello-pontine angle tumours?
abstract: Four groups of subjects have been investigated, using a manual phase audiometer. Group 1 consisted of 20 normal-hearing subjects. Group 2 of 22 subjects with unilateral or asymmetric cochlear hearing loss. Group 3 of 14 subjects with surgically verified CPA tumours, and Group 4 of 15 subjects with unilateral conductive impairment. In this report we suggest an upper borderline value for detecting interaural time differences of 120 microseconds. If the subject is able to detect only a value exceeding 120 microseconds, there is likely to be a retrocochlear lesion.
authors.affiliation: Department of Oto-Rhino-Laryngology, University Hospital of Lund, Sweden.
authors.forename: U
authors.initials: U
authors.lastname: Almqvist
authors.forename: B
authors.initials: B
authors.lastname: Almqvist
authors.forename: K E
authors.initials: KE
authors.lastname: Jönsson
mesh_terms: D000293:Adolescent; D000328:Adult; D001299:Audiometry / Q000379:methods*; D002528:Cerebellar Neoplasms / Q000175:diagnosis* / Q000503:physiopathology; D002530:Cerebellopontine Angle / Q000503:physiopathology; D002648:Child; D005260:Female; D006311:Hearing Disorders / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values