Exploring the Role of Fricatives in Classifying Healthy Subjects and Patients with Amyotrophic Lateral Sclerosis and Parkinson's Disease

Bhattacharjee, T and Belur, Y and Nalini, A and Yadav, R and Ghosh, PK (2023) Exploring the Role of Fricatives in Classifying Healthy Subjects and Patients with Amyotrophic Lateral Sclerosis and Parkinson's Disease. In: UNSPECIFIED.

PDF Ica_iee_int_con_aco_spe_sig_pro_pro_2023.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

Dysarthria due to Amyotrophic Lateral Sclerosis (ALS) and Parkinson's Disease (PD) impairs sustained phoneme productions. Vowels and fricatives get affected differently owing to the differences in their production mechanisms. This paper examines three sustained voiceless fricatives - /s/, /sh/ and /f/, as compared to three sustained vowels - /a/, /i/ and /o/, for classifying patients with ALS/PD and Healthy Controls (HC). Fricatives are found to achieve higher classification accuracies than /a/ and /o/, though /i/ outperforms all. Patients seem to find it difficult to form constrictions while producing fricatives, or to proximally position the tongue and palate while uttering /i/, due to dysarthria. Unwanted voicing added to voiceless fricatives by the patient population further contributes towards the discrimination. Both source (related to vocal cord) and filter (related to vocal tract) cues of fricatives, on average, outperform those of vowels. Lastly, decision-level fusion of /i/-/s/-/sh/, with a pooled classifier for these three phonemes, achieves the highest mean ALS vs. HC classification accuracy of 83.35, although in PD vs. HC case, fusion of multiple /i/ utterances performs the best with an accuracy of 80.03. © 2023 IEEE.

Item Type:	Conference Proceedings
Publication:	ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	04 Mar 2024 09:07
Last Modified:	04 Mar 2024 09:07
URI:	https://eprints.iisc.ac.in/id/eprint/84284

Actions (login required)

View Item