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

Kavitha Gurunathgowda  Sannamani; Madhumanti  Chakraborty; Neelamegarajan  Devi; Prashanth Prabhu

doi:10.18502/avr.v31i1.8131

Kavitha Gurunathgowda Sannamani Department of Audiology, All India Institute of Speech and Hearing, Mysuru, India
Madhumanti Chakraborty Department of Audiology, All India Institute of Speech and Hearing, Mysuru, India
Neelamegarajan Devi Department of Audiology, All India Institute of Speech and Hearing, Mysuru, India
Prashanth Prabhu Department of Audiology, All India Institute of Speech and Hearing, Mysuru, India

DOI: https://doi.org/10.18502/avr.v31i1.8131

Abstract

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.