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CC BY 4.0 · Journal of Health and Allied Sciences NU 2024; 14(04): 494-498
DOI: 10.1055/s-0044-1778697
Original Article

Effect of Head Position on Distortion Product Otoacoustic Emissions

SA Pancham Ponnana 
1   Department of ENT, Kodagu Institute of Medical Sciences, Madikeri, Karnataka, India
,
Jim Saroj Winston 
2   Nitte (DU), Nitte Institute of Speech and Hearing, Mangalore, Karnataka, India
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Abstract

Objectives The study aimed to explore the impact of various head positions on the distortion product otoacoustic emissions (DPOAE) amplitudes, identifying the specific DPOAE frequencies showing the effect was also of interest.

Materials and Methods DPOAEs were recorded from the right ears of 50 normal-hearing individuals in six head positions, supine, and five sitting positions (head erect, roll left, roll right, pitch backward, and pitch forward). DPOAEs were averaged and measured for their overall and frequency-specific amplitudes at 1 kHz, 1.5 kHz, 2 kHz, 3 kHz, 4 kHz, 6 kHz, and 8 kHz.

Statistical Analysis To investigate the statistical significance of the observed mean differences, the data was tested using repeated measures of analysis of variance (ANOVA) following the Shapiro–Wilk normality test. The pair-wise comparison was tested using the Bonferroni post-hoc test and one-sided Bayesian paired sample t-test.

Results The results of ANOVA revealed a significant main effect of head posture only at 1 kHz. The Bonferroni post-hoc test and one-sided Bayesian paired sample t-test results showed significantly higher DPOAE amplitude in the head erect compared to the supine position. There were no significant differences between other pairs of head postures.

Conclusion Head posture is a trivial influencing factor of DPOAEs and hence, does not require consideration in interpreting DPOAEs.

Keywords

intracranial pressure - DPOAEs - head posture - middle ear stiffness

Ethical Disclosure

The authors hereby declare that the research article titled “Effect of Head Position on Distortion Product Otoacoustic Emissions” has been conducted following clauses of the Declaration of Helsinki (2013).




Publication History

Article published online:
22 January 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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