title: Variations in acoustic admittance related to type of ear tip. A plea for a standardized method.
abstract: In order to assess the validity of using various ear tips, tympanometry and acoustic admittance were studied in 20 young healthy subjects, and three different types of ear tip used to seal the external auditory canal. Significant variations in the admittance components and tympanometry curves were observed, resulting most probably from changes in the canal volume and the physical nature of the tipe. It appears advisable to develop and adopt an appropriate, standard ear tip for studies of admittance audiometry.
mesh_terms: D000293:Adolescent; D000328:Adult; D001299:Audiometry / Q000295:instrumentation*; D004431:Ear, External / Q000502:physiology; D004432:Ear, Middle / Q000502:physiology; D005069:Evaluation Studies as Topic; D006801:Humans