학술논문
High resolution pole-zero analysis of Parkinsonian speech
Document Type
Periodical
Source
IEEE Transactions on Biomedical Engineering IEEE Trans. Biomed. Eng. Biomedical Engineering, IEEE Transactions on. 38(2):161-167 Feb, 1991
Subject
Language
ISSN
0018-9294
1558-2531
1558-2531
Abstract
High-resolution analysis of voice speech signals in Parkinsonian patients using a pitch synchronous pole-zero model is introduced. A modified estimation error is defined, leading to an accurate and consistent determination of the excitation instants of the model. An infinite resolution in determining these instants, despite the finite sampling interval, is achieved by mapping the discrete (digitized) problem into a continuous one. The analysis is found to be useful in analyzing Parkinsonian speech where the goal is to detect and quantify the Parkinsonian tremor and rigidity from sustained voiced sounds. The speech analysis could accurately recover both components of the Parkinsonian disorder with a high correlation to a clinical diagnosis and electromyography measurements. It could also rank severity of the symptoms and classify between Parkinsonian patients and healthy subjects.ETX