Phase audiometry--a rapid method for detecting cerebello-pontine angle tumours?
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.
Almqvist
U
U
Department of Oto-Rhino-Laryngology, University Hospital of Lund, Sweden.
Almqvist
B
B
Jönsson
K E
KE
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