The influence of the middle ear status on the measurement of evoked otoacoustic emissions (DPOAE)

The aim of this study was to evaluate the influence of the middle ear status on detection and amplitude of otoacoustic emissions-DPOAE. DPOAE were detected in all healthy ears and their amplitude was between 11.4 and 22.4 dB SPL. Responses at frequencies of 0.5 and 0.75 kHz were not detected in the...

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Bibliographic Details
Published inOtolaryngologia Polska Vol. 52; no. 4; p. 451
Main Authors Topolska, M M, Hassmann-Poznańska, E, Musiatowicz, M P
Format Journal Article
LanguagePolish
Published Poland 1998
Subjects
Acoustic Stimulation - methods
Adolescent
Audiometry, Pure-Tone - methods
Child
Child, Preschool
Ear, Middle - physiology
Humans
Labyrinth Diseases - diagnosis
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Summary:The aim of this study was to evaluate the influence of the middle ear status on detection and amplitude of otoacoustic emissions-DPOAE. DPOAE were detected in all healthy ears and their amplitude was between 11.4 and 22.4 dB SPL. Responses at frequencies of 0.5 and 0.75 kHz were not detected in the group of children with Eustachian tube dysfunction in 60% and 27% of ears respectively. The absence of DPOAE responses in the group of children with B type tympanometry was found in 3/4 of the investigated ears at frequencies of 0.5 and 0.75 kHz and in over 50% of ears at frequencies of 1.0 and 8.0 kHz. No influence of cochlear reserve on detection and amplitude of DPOAE was found in the studied group. Conductive hearing loss associated with a presence of negative pressure and effusion in the middle ear inhibits DPOAE detection and causes decrease of otoacoustic emission amplitude.
ISSN:0030-6657