Cancelling Intermodulation Distortions for Otoacoustic Emission Measurements with Earbuds
Berken Utku Demirel, Khaldoon Al-Naimi, Fahim Kawsar, Alessandro Montanari
Abstract
This paper presents a novel cancellation method of Intermodulation Distortions (IMDs) for earbud speakers used to measure Distortion Product Otoacoustic Emissions (DPOAE). Speakers’ non-linear behaviour is a significant problem for earbuds with small loudspeakers due to limitations in cone movement. Linear and non-linear speaker modelling enables us to inject exact distortion inverse to cancel what is introduced by speakers’ non-linearities. Our proposed method is compared against state-of-the-art related works in terms of harmonic reduction ratio. Simulation results and evaluation on real hardware show a 77% to 95% reduction in the harmonic distortions of a focused frequency region at the output of the loudspeaker, outperforming existing works by 6% to 14%.
BibTeX
@inproceedings{icassp2023_cancellinginterm,
title = {Cancelling Intermodulation Distortions for Otoacoustic Emission Measurements with Earbuds},
author = {Berken Utku Demirel and Khaldoon Al-Naimi and Fahim Kawsar and Alessandro Montanari},
booktitle = {ICASSP 2023},
year = {2023}
}