Several properties of distortion product otoacoustic emissions can be modeled by simple input/output functions

2008 ◽  
Vol 123 (5) ◽  
pp. 3852-3852
Author(s):  
Paul Fahey ◽  
Glen K. Martin
Keyword(s):  
Otoacoustic Emissions ◽  
Distortion Product Otoacoustic Emissions ◽  
Input Output ◽  
Distortion Product

scholarly journals Distortion Product Otoacoustic Emissions (DPOAEs) In Tinnitus Patients

2021 ◽  
Author(s):  
Hend F. Alshabory ◽  
Takwa A. Gabr ◽  
Mona A. Kotait
Keyword(s):  
Otoacoustic Emissions ◽  
Direct Consequence ◽  
Normal Hearing ◽  
Distortion Product Otoacoustic Emissions ◽  
Control Group ◽  
Study Group ◽  
Input Output ◽  
Sound Stimulation ◽  
Hearing Sensitivity ◽  
Distortion Product

Abstract Introduction Tinnitus is the perception of sound in the absence of external sound stimulation. There is a general agreement that it is a direct consequence of irreversible and permanent cochlear damage. Objectives The present work is designed to study the distortion product otoacoustic emissions (DPOAEs) in tinnitus patients with normal hearing in comparison with normal hearing control and to study any possible correlation between DPOAEs recording and patients' complaints. Methods The present study included 80 subjects divided into 2 groups: Control group: consisted of 30 normal-hearing adults not complaining of tinnitus and Study group: consisted of 50 normal-hearing adults complaining of tinnitus. The methodology includes full audiological history, otoscopic examination, basic audiological evaluation, DPOAEs including both DP-gram and DPOAEs input/output functions. Results Basic audiological evaluation showed within normal hearing sensitivity in both groups, however, with significant higher hearing thresholds in tinnitus patients at all frequency ranges. The Tinnitus Handicap Inventory Questionnaire showed mean scores of 35.2 ± 16.9 in the study group. The DP-gram showed higher amplitudes in the control group when compared with tinnitus patients. The DPOAEs input-output functions at different frequencies (1, 2, 4 and 6kHz) also showed higher amplitudes at all frequencies and different input levels. The slope of the I/O function tends to be steeper in tinnitus cases. Conclusion Patients with tinnitus might have neural dysfunction at either the level of the cochlea, as shown in reduced DPOAE levels, and changes in the normal DP-I/O function recorded in the present work.

scholarly journals Otoacoustic emissions in young adults exposed to drums noise of a college band

Revista CEFAC ◽  
2017 ◽  
Vol 19 (5) ◽  
pp. 645-653 ◽  
Author(s):  
Paula Botelho da Silva ◽  
Ana Cláudia Fiorini ◽  
Marisa Frasson de Azevedo
Keyword(s):  
Young Adults ◽  
Otoacoustic Emissions ◽  
Distortion Product Otoacoustic Emissions ◽  
Control Group ◽  
Study Group ◽  
Output Function ◽  
Input Output ◽  
Transient Evoked Otoacoustic Emissions ◽  
Distortion Product ◽  
College Band

ABSTRACT Purpose: to identify cochlear dysfunction and occurrence of tinnitus in young adults exposed to drums noise of a college band. Methods: the sample included 50 subjects: 25 musicians (study group) and 25 non-musicians (control group). The procedures included anamnesis, pure tone audiometry, acoustic impedance and Transient Evoked Otoacoustic Emissions, Distortion Product Otoacoustic Emissions and Distortion Product Otoacoustic Emissions Input-Output function. Results: positive correlation between the occurrence of tinnitus and the variables exposure time and use of personal stereos was found. Overall, the study group showed significantly lower Transient Evoked Otoacoustic Emissions, when compared to the control group. In the study group, there was a tendency toward worse response in 6 kHz(f2) in Distortion Product Otoacoustic Emissions in both ears. The Distortion Product Otoacoustic Emissions Input-Output function did not differ between groups nor did its slope. Conclusion: in general, otoacoustic emissions were worse in noise-exposed young people (study group) when compared to the unexposed (control group), indicating that the test may be important in early identification of cochlear changes.

scholarly journals Assessment of Distortion Product Otoacoustic Emissions Input-Output Function in Individuals with and without Musical Abilities

2021 ◽  
Author(s):  
Kavitha Gurunathgowda Sannamani ◽  
Madhumanti Chakraborty ◽  
Neelamegarajan Devi ◽  
Prashanth Prabhu
Keyword(s):  
Otoacoustic Emissions ◽  
Musical Training ◽  
Superior Performance ◽  
Distortion Product Otoacoustic Emissions ◽  
Output Function ◽  
Input Output ◽  
Distortion Product ◽  
Significant Difference ◽  
Auditory Tasks ◽  
Age Range

Background and Aim: Musical  training  has shown to bring about superior  performance  in several auditory and non-auditory tasks compared to those without musical exposure. Distortion product otoacoustic emissions (DPOAE) input-output function can be an indicator of the non-linear functioning of the cochlea. The objective of this study was to evaluate and compare the differences in the slope of DPOAE input-output function in individuals with and without musical abilities. Methods: Twenty normal-hearing individuals were considered in the age range of 18–25 years. They were divided based on the scores obtained on the questionnaire of musical abilities, as individuals with and without musical abilities. DPOAE input-output function was done   for each of the two groups. The slope of the DPOAE input-output function was compared at different frequencies between the groups. Results: The results of the Mann Whitney test revealed that the slope was significantly steeper at 2000, 3000, 4000 and 6000 Hz in individuals with musical abilities. There was no significant difference in slope at 1000 and 1500 Hz. Conclusion: The increased steepness of the slope indicates a relatively better functioning     of the cochlea in individuals with musical abilities. The enhanced perception of music may induce changes in the cochlea resulting in a better appreciation of music.

Relationship Between Distortion Product Otoacoustic Emissions and Hearing Loss

2006 ◽  
Vol 2 (1) ◽  
pp. 2-9
Author(s):  
Tiffany A. Johnson ◽  
Stephen T. Neely ◽  
Michael P. Gorga
Keyword(s):  
Hearing Loss ◽  
Otoacoustic Emissions ◽  
Distortion Product Otoacoustic Emissions ◽  
Distortion Product
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