title: Relationship between evoked otoacoustic emissions and middle-ear dynamic characteristics.
abstract: Evoked otoacoustic emissions (EOAEs) are considered to originate from outer hair cell movement and to be transmitted to the external auditory meatus through the ossicular chain and eardrum in a retrograde fashion. Therefore, the effect of the middle ear on EOAEs seems to be large. A sweep frequency middle-ear analyzer (MEA) has been developed that gives much more information on middle-ear dynamic characteristics than a conventional impedance meter. In this paper, applying our own EOAE measuring system and the MEA, EOAEs and middle-ear dynamic characteristics of normal subjects were measured, and an attempt was made to clarify the relationship between EOAEs and middle-ear dynamic characteristics. It is concluded that EOAEs are detected most distinctly at the middle-ear resonance frequency and that EOAEs are most detectable in normal subjects whose middle-ear mobility is moderate.
authors.affiliation: Department of Mechanical Engineering, Tohoku University, Sendai, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Wada
authors.forename: K
authors.initials: K
authors.lastname: Ohyama
authors.forename: T
authors.initials: T
authors.lastname: Kobayashi
authors.forename: N
authors.initials: N
authors.lastname: Sunaga
authors.forename: T
authors.initials: T
authors.lastname: Koike
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D000669:Amplifiers, Electronic; D001299:Audiometry; D001307:Auditory Perception; D001309:Auditory Threshold; D003051:Cochlea / Q000502:physiology*; D004429:Ear Ossicles / Q000502:physiology; D004432:Ear, Middle / Q000502:physiology*; D005260:Female; D006198:Hair Cells, Auditory / Q000502:physiology; D006801:Humans; D008297:Male; D014432:Tympanic Membrane / Q000502:physiology