نتایج جستجو برای: otoacoustic emissions spontaneous

تعداد نتایج: 178936  

Journal: :The Journal of the Acoustical Society of America 2015
Kyle P Walsh Edward G Pasanen Dennis McFadden

Previous studies have demonstrated that the otoacoustic emissions (OAEs) measured during behavioral tasks can have different magnitudes when subjects are attending selectively or not attending. The implication is that the cognitive and perceptual demands of a task can affect the first neural stage of auditory processing-the sensory receptors themselves. However, the directions of the reported a...

Journal: :The Journal of the Acoustical Society of America 1994
H H Nakajima E S Olson D C Mountain A E Hubbard

Electrically evoked otoacoustic emissions were measured with current delivered to the second and third turns of the gerbil cochlea. The emission magnitude and phase are dependent on the characteristic frequency (CF) of the stimulating microelectrode location. The death of the animal resulted in an initial increase in emission below the CF of the electrode location and a decrease in emission nea...

2013
Giovanna Zimatore Marta Cavagnaro Alessandro Giuliani Alfredo Colosimo

Transient-Evoked Otoacoustic Emissions (TEOAEs) were studied, with particular reference to their subject-dependent features. To this end, an electric model of the ear was implemented and validated. Simulated and natural TEOAEs were analyzed through a nonlinear analysis technique. The simulated signals were able to reproduce the dynamical features of the experimentally observed TEOAEs and, most ...

Journal: :AJNR. American journal of neuroradiology 2000
S Furuta M Ogura S Higano S Takahashi T Kawase

A 12-year-old female patient presented with unilateral sensorineural hearing loss. Distortion-product otoacoustic emission testing failed to reveal any measurable emissions in the affected side. MR imaging did not reveal labyrinthine malformation. Three-dimensional Fourier transformation-constructive interference in steady-state MR images showed a thin cochlear branch. We speculated that mumps ...

2011
David Kemp

Results: In TEOAEs, the mean overall correlation (reproducibility) and the mean overall strength in involved ears were 10.96±23.36 and 0.99±3.45 dB, respectively, before the treatment, which reached 22.88±36.55 and 1.85±5.3, respectively, after the treatment (P>0.05). Significant difference between “correlation score” (average of correlations at 3-4 involved frequencies) before and after treatm...

Journal: :Brazilian journal of otorhinolaryngology 2011
Adriana Betes Heupa Claudia Giglio de Oliveira Gonçalves Herton Coifman

UNLABELLED Shooting is an activity that exposes military personnel to noise impact, which may cause irreversible effects on hearing. OBJECTIVE To evaluate impact noise on the hearing of military personnel that practice shooting. STUDY DESIGN A case-control retrospective study. METHODS 115 military personnel were enrolled; 65 had been exposed to impact noise and 50 were non-exposed. Firear...

2012
D. SOI D. BRAMBILLA E. COMIOTTO F. DI BERARDINO E. FILIPPONI M. SOCCI E. SPREAFICO S. FORTI A. CESARANI

Several studies have previously demonstrated that postural changes modify evoked otoacoustic emission. In order to evaluate a possible interaction between eye muscles and ciliated cells in the inner ear, we studied the effects of eye lateralization on the contralateral suppression of transient evoked otoacoustic emissions (TEOAEs). Thirty-eight normal hearing subjects with TEOAEs were recruited...

1998

Abstract: The time course for finctional development of the human cochlea is not clear. The advent of otoacoustic emissions (0~) methodology has made it possible to non-invasively probe coehlear function in humans. Distortion product OAE is~suppression tuning curves indirwtiy reflect coe~ear frequency resolution and have been generated in adults and neonates to investigate the development of co...

Journal: :CoDAS 2013
Kilza Arruda de Lyra e Silva Juliana Granja Urosas Seisse Gabriela Gandolfi Sanches Renata Mota Mamede Carvallo

PURPOSE To characterize the normal values of acoustic energy reflectance obtained with pure-tone stimulation in neonates prior to hospital discharge. METHODS Seventy-seven infants (37 girls and 40 boys) were evaluated by measuring acoustic reflectance using pure-tone stimuli, transient-evoked otoacoustic emissions, and tympanometric probe frequencies of 226 Hz and 1 kHz. RESULTS At low freq...

Journal: :Brazilian journal of otorhinolaryngology 2006
Mariana Lopes Fávero Tanit Ganz Sanchez Ricardo Ferreira Bento Andreia Ferreira Nascimento

INTRODUCTION The medial olivocochlear bundle effect is studied through the suppression of otoacoustic emissions and seems to be influenced by the laterality of the central nervous system, presenting no symmetry between right and left ear. A dysfunction of this bundle may be involved in the generation of tinnitus, although this fact was not confirmed. OBJECTIVES Study the suppression of distor...

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