Normal acoustic reflex amplitude growth and the influence of cochlear hearing loss
نویسندگان
چکیده
منابع مشابه
With Normal Hearing and Cochlear Hearing Loss
Distortion product emissions (DPEs) at 2f1 f2 frequencies were measured in 53 human ears; 21 of them exhibited cochlear hearing loss. DPEs were obtained as a function of stimulus level (DPE growth curves) at seven frequency regions between 707 Hz and 5656 Hz. Several distinctly different shapes or patterns of DPE growth curves were observed. These included single-segment monotonic growth curves...
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Acoustic reflex is a sensitive indicator of middle ear lesions when the tympanic membrane is intact and tympanometry is normal. Acoustic reflex is not usually observed in conductive hearing loss caused by disruption of the ossicular chain including ossicular discontinuity and fixation. Ossicular disruption can show at least partially intact acoustic reflex under a certain condition. Moreover, o...
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In a noise environment devoid of impulsive sounds the ear responds as a linear system to levels sufficient to destroy it in response to energy input. In such environments a long time average Aweighted measurement will provide a suitable measure of exposure. In an environment characterised by impulsive sounds, however, it is proposed that the response of the ear is determined by the response tim...
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Low-frequency otoacoustic emissions (OAEs) are often concealed by acoustic background noise such as those from a patient's breathing and from the environment during recording in clinics. When using electrocochleaography (ECochG or ECoG), such as cochlear microphonics (CMs), acoustic background noise do not contaminate the recordings. Our objective is to study the response pattern of CM waveform...
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ژورنال
عنوان ژورنال: South African Journal of Communication Disorders
سال: 1985
ISSN: 2225-4765,0379-8046
DOI: 10.4102/sajcd.v32i1.335