Effect of ear-canal air pressure on evoked otoacoustic emissions

Naeve, Susan L.; Margolis, Robert H.; Levine, Samuel C.; Fournier, Eric M.

doi:10.1121/1.403695

Cited by 89 publications

(47 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Eustachian Tube dysfunction may also impact OEA recording. 1,2 The frequent use of OAEs as audiological investigation tool in infants has fostered even further the interest in infant tympanometry.…”

Section: Introductionmentioning

confidence: 99%

Medidas imitanciométricas em crianças com ausência de emissões otoacústicas

Linares

Carvallo

2008

Rev. Bras. Otorrinolaringol.

View full text Add to dashboard Cite

Consi dering the hypothesis that middle ear changes can impair the recording of otoacoustic emissions, it is possible that absent otoacoustic emissions in infants could be associated with a light tympanometric change. Aim: To study the association between transient otoacoustic emissions and changes in acoustic immittance measurements with 226Hz probe tone in neonates. Methods: Cross-sectional contemporary cohort study. 20 infants with no transient otoacoustic emissions (study group) and 101 infants with transient otoacoustic emissions (control group), with ages ranged from birth to eight months, were assessed. Infants were submitted to: admittance tympanometry; contralateral acoustic reflex threshold with stimulus of 0.5, 1, 2, 4 kHz and broad band noise; transient and distortion product otoacoustic emissions. The auditory brain response was used to study the threshold in neonates without transient otoacoustic emissions. Results: Significant statistical differences were observed between the groups (p < 0.005), characterized by reduction in tympanometric configuration and increase acoustic reflex thresholds in the study group. These data suggest the occurrence of middle ear mild impairment in infants without transient otoacoustic emissions associated with normal auditory brain response. Conclusion: tympanometry associated with acoustic reflex adds accuracy to the diagnosis of middle ear abnormalities.

show abstract

Section: Introductionmentioning

confidence: 99%

Medidas imitanciométricas em crianças com ausência de emissões otoacústicas

Linares

Carvallo

2008

Rev. Bras. Otorrinolaringol.

View full text Add to dashboard Cite

show abstract

“…Although middle-ear status was assessed before each session, even small changes in pressure that fell within the normal range may have resulted in changes in DPOAEs (Naeve et al, 1992;Zhang and Abbas, 1997). Measurements may have also been affected by stimulus calibration.…”

Section: Discussionmentioning

confidence: 99%

Reliability of distortion-product otoacoustic emissions and their relation to loudness

Thorson

Kopun

Neely

et al. 2012

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

The reliability of distortion-product otoacoustic emission (DPOAE) measurements and their relation to loudness measurements was examined in 16 normal-hearing subjects and 58 subjects with hearing loss. The level of the distortion product (L d ) was compared across two sessions and resulted in correlations that exceeded 0.90. The reliability of DPOAEs was less when parameters from nonlinear fits to the input/output (I/O) functions were compared across visits. Next, the relationship between DPOAE I/O parameters and the slope of the low-level portion of the categorical loudness scaling (CLS) function (soft slope) was assessed. Correlations of 0.65, 0.74, and 0.81 at 1, 2, and 4 kHz were observed between CLS soft slope and combined DPOAE parameters. Behavioral threshold had correlations of 0.82, 0.83, and 0.88 at 1, 2, and 4 kHz with CLS soft slope. Combining DPOAEs and behavioral threshold provided little additional information. Lastly, a multivariate approach utilizing the entire DPOAE I/O function was used to predict the CLS rating for each input level (dB SPL). Standard error of the estimate when using this method ranged from 2.4 to 3.0 categorical units (CU), suggesting that DPOAE I/O functions can predict CLS measures within the CU step size used in this study (5).

show abstract

“…However, previous animal studies have demonstrated that the amplitude of otoacoustic emissions can change by 3-6 dB under conditions of hypobaric hypoxia due to changes in the pressure gradient across the tympanic membrane ( 8 2,000 Pa). Nevertheless, opening the tympanic cavity causes a substantial reduction in the pressure that is transmitted to the inner ear from the ear canal [9,10] .…”

Section: Introductionmentioning

confidence: 99%

Physical and Physiological Effects on Otoacoustic Emissions in Hypobaric Hypoxia

Ide

Harada

Kanzaki

et al. 2010

ORL

View full text Add to dashboard Cite

Tinnitus and dizziness are symptoms of acute mountain sickness. We investigated the mechanism by which high altitude (i.e. hypobaric hypoxia) affects inner ear function by measuring transient evoked otoacoustic emissions (TEOAE) and distortion product otoacoustic emissions (DPOAE) under conditions of normobaric normoxia (1,013 hPa; 760 mm Hg) and hypobaric hypoxia (540 hPa; 405 mm Hg). The possibility that air pressure effects on the eustachian tube impacted our findings was excluded by the use of tympanograms. The nonphysiological effects of hypobaric hypoxia on TEOAE and DPOAE were also assessed using an ear simulator. Under conditions of hypobaric hypoxia, both TEOAE and DPOAE levels were reduced. The amount of reduction that occurred was approximately 4 dB in the total echo power and signal-to-noise ratio of the TEOAE, and in the 2f₁ – f₂ element level of the DPOAE. Stimulus levels that were measured using an ear simulator were also reduced by approximately 4 dB under conditions of hypobaric hypoxia. These results do not indicate that stimulus levels affected TEOAE and DPOAE levels because these levels were actually only slightly affected by changes in the stimulus level. Instead, this reduction was likely due to the nonphysiological hypobaric effects of the sound pressure emitted from the tympanic membrane. We conclude that the impact of hypobaric hypoxia on cochlear function was negligible up to pressures of 540 hPa.

show abstract

Effect of ear-canal air pressure on evoked otoacoustic emissions

Cited by 89 publications

References 17 publications

Medidas imitanciométricas em crianças com ausência de emissões otoacústicas

Medidas imitanciométricas em crianças com ausência de emissões otoacústicas

Reliability of distortion-product otoacoustic emissions and their relation to loudness

Physical and Physiological Effects on Otoacoustic Emissions in Hypobaric Hypoxia

Contact Info

Product

Resources

About