UNLABELLED Mismatch Negativity (MMN) is used to evaluate the central auditory system. AIM to characterize the MMN, in normal subjects. MATERIALS AND METHODS prospective study, 12 subjects, six males and six females, between the ages of 18 and 24. "Mann-Whytnei" test. EXAMS: Pure Tone Audiometry (PTA), Tympanometry, Otoacoustic Emissions and Short and Long Latency Auditory Potentials (MMN). ...

Distortion-product otoacoustic emissions (DPOAEs) were measured in a New World primate, the common marmoset (Callithrix jacchus). We determined the optimal primary-tone frequency ratio (f(2)/f(1)) to generate DPOAEs of maximal amplitude between 3 and 24 kHz. The optimal f(2)/f(1), determined by varying f(2)/f(1) from 1.02 to 1.40 using equilevel primary tones, decreased with increasing f(2) fre...

The use of otoacoustic emissions to predict ototoxic-induced hearing changes" (2009). Scholar Archive. Paper 483.

UNLABELLED Mismatch Negativity is an endogenous potential which reflects the processing of differences incurred in the acoustic stimulus. AIM to characterize MMN responses in elderly subjects and compare with adult subjects. MATERIALS AND METHODS prospective study involving 30 subjects, 15 men and 15 women, aged between 60 and 80 years and 11 months. Statistical test: Mann-Whitney. The subj...

PURPOSE This article is the 1st in a series of 4 articles on a recently completed multistate study of newborn hearing screening. METHOD The study examined the efficacy of the 2-stage otoacoustic emission/automated auditory brainstem response (OAE/A-ABR) protocol for identifying hearing loss in newborns. RESULTS The study found that the 2-stage OAE/A-ABR protocol did miss a significant numbe...

We review recent progress in understanding the physical and physiological mechanisms that generate otoacoustic emissions (OAEs). Until recently, the conceptual model underlying the interpretation of OAEs has been an integrated view that regards all OAEs as manifestations of cochlear nonlinearity. However, OAEs appear to arise by at least two fundamentally different mechanisms within the cochlea...

The audiologic diagnosis of pseudohypacusis continues to challenge the clinical audiologist. The introduction of otoacoustic emissions (OAEs) to the test repertoire of the audiologist may prove valuable in the evaluation of pseudohypacusis. This report highlights five cases in which transient evoked otoacoustic emissions (TEOAEs) were used to cross-check the validity of subjective audiologic th...