The level and growth behavior of the 2 f1−f2 distortion product otoacoustic emission and its relationship to auditory sensitivity in normal hearing and cochlear hearing loss

1998 ◽  
Vol 103 (6) ◽  
pp. 3431-3444 ◽  
Author(s):  
Peter Kummer ◽  
Thomas Janssen ◽  
Wolfgang Arnold
Keyword(s):  
Hearing Loss ◽  
Otoacoustic Emission ◽  
Normal Hearing ◽  
Growth Behavior ◽  
Auditory Sensitivity ◽  
Distortion Product Otoacoustic Emission ◽  
Distortion Product ◽  
Cochlear Hearing Loss

Distortion-Product Emissions and Auditory Sensitivity in Human Ears With Normal Hearing and Cochlear Hearing Loss

1992 ◽  
Vol 35 (5) ◽  
pp. 1142-1159 ◽  
Author(s):  
David A. Nelson ◽  
Barry P. Kimberley
Keyword(s):  
Hearing Loss ◽  
Growth Curves ◽  
Normal Hearing ◽  
Stimulus Level ◽  
Auditory Sensitivity ◽  
Auditory Thresholds ◽  
Low Level ◽  
Distortion Product ◽  
Cochlear Hearing Loss ◽  
High Stimulus

Distortion product emissions (DPEs) at 2f 1 – f 2 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 with and without saturation at moderate and high stimulus levels, diphasic growth curves with nulls at moderate stimulus levels, and nonmonotonic growth curves with negative slopes at high stimulus levels. Low-level, irregularly shaped segments were more frequent in normal-hearing ears, suggestive of normal low-level active nonlinearities from the outer-hair-cell subsystem. High-level, steeply sloped segments were frequent in hearing-impaired ears, suggestive of residual nonlinearities from a cochlear partition without functional outer hair cells. The stimulus level at which the DPE could just be distinguished from the noise floor, the DPE detection threshold, demonstrated moderate positive correlations (r's from 0.50 to 0.81) with auditory thresholds when all ears, both normal and impaired, were considered together. Those correlations were not strong enough to quantitatively predict auditory thresholds with any great accuracy. However, DPE thresholds were able to predict abnormal auditory sensitivity with some precision. DPE thresholds correctly predicted abnormal auditory sensitivity 79% of the time in the present study, and up to 96% of the time in previous studies. These results suggest that DPE thresholds may prove useful for hearing screening in cases where cooperation from the subject is limited or where corroboration of cochlear hearing loss is required. Different patterns of DPE growth curves suggest underlying micro-mechanical differences between ears, but the differential diagnostic value of those patterns remains to be determined.

Effect of mastoid drilling on hearing of the contralateral ear

2013 ◽  
Vol 127 (10) ◽  
pp. 952-956 ◽  
Author(s):  
A Goyal ◽  
P P Singh ◽  
A Vashishth
Keyword(s):  
Hearing Loss ◽  
High Frequency ◽  
Otoacoustic Emissions ◽  
Pure Tone Audiometry ◽  
Otoacoustic Emission ◽  
Prospective Clinical Study ◽  
Distortion Product Otoacoustic Emission ◽  
High Frequencies ◽  
Distortion Product ◽  
Contralateral Ear

AbstractObjectives:This study aimed to: understand the effect that high intensity noise associated with drilling (during otological surgery) has on hearing in the contralateral ear; determine the nature of hearing loss, if any, by establishing whether it is temporary or persistent; and examine the association between hearing loss and various drill parameters.Methods:A prospective clinical study was carried out at a tertiary centre. Thirty patients with unilateral cholesteatoma and normal contralateral hearing were included. Patients were evaluated pre-operatively and for five days following surgery using high frequency pure tone audiometry, and low and high frequency transient evoked and distortion product otoacoustic emission testing.Results:The findings revealed statistically significant changes in distortion product otoacoustic emissions at high frequencies (p = 0.016), and in transient evoked otoacoustic emissions at both low and high frequencies (p = 0.035 and 0.021, respectively). There was a higher statistical association between otoacoustic emission changes and cutting burrs compared with diamond burrs.Conclusion:Drilling during mastoid surgery poses a threat to hearing in the contralateral ear due to noise and vibration conducted transcranially.

scholarly journals Characteristics of the 2f1-f2 distortion product otoacoustic emission in a normal hearing population

2014 ◽  
Vol 135 (1) ◽  
pp. 287-299 ◽  
Author(s):  
Gayla L. Poling ◽  
Jonathan H. Siegel ◽  
Jungmee Lee ◽  
Jungwha Lee ◽  
Sumitrajit Dhar
Keyword(s):  
Otoacoustic Emission ◽  
Normal Hearing ◽  
Distortion Product Otoacoustic Emission ◽  
Distortion Product
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