In this paper we propose the use of nonlinear speech features to improve the voice quality measurement. We have tested a couple of features from the Dynamical System Theory, namely: the Correlation Dimension and the largest Lyapunov Exponent. In particular, we have studied the optimal size of time window for this type of analysis in the field of the characterization of the voice quality. Two sy...

This paper describes two comparative studies of voice quality assessment based on complementary approaches. The first study was undertaken on 449 speakers (including 391 dysphonic patients) whose voice quality was evaluated in parallel by a perceptual judgment and objective measurements on acoustic and aerodynamic data. Results showed that a nonlinear combination of 7 parameters allowed the cla...

Objective:The study aimed at differentiating Adductor Spasmodic Dysphonia (ADSD) from Muscle Tension Dysphonia (MTD) using acoustic measurements . Method: Perceptual as well as acoustic analysis of the voice was done on 12 patients of Adductor Spasmodic dysphonics and Muscle tension dysphonics each. The age of these patients ranged between 30 to 64 years . Results: Adductor spasmodic dysphonics...

Adductor-type spasmodic dysphonia (ADSD) is a voice disorder of uncertain, though likely neurogenic origin. Symptoms of the disorder include mild to profound "strain and strangle" sensations during voiced speech tasks that, in the most severe form, are physically and psychologically debilitating. Over the years, treatment approaches have evolved from behavioral attempts at voice modification, t...

UNLABELLED Bulimia nervosa (BN) is a type of feeding disorder that starts in adolescence and presents a variety of symptoms, recurrent vomiting in the oral cavity that may reach down to the larynx - similarly to gastro-esophageal reflux, causing laryngeal and voice disorder alterations. AIM These studies aimed at surveying the literature and investigate the studies that considered BN a risk f...

We present in this paper a voice conversion (VC) method for a person with an articulation disorder resulting from athetoid cerebral palsy. The movement of such speakers is limited by their athetoid symptoms, and their consonants are often unstable or unclear, which makes it difficult for them to communicate. In this paper, exemplar-based spectral conversion using nonnegative matrix factorizatio...

Due to nature of jobs, unhealthy social habits people are subjected to risk of voice problem [9]. If there is some neurological disorder then also there is problem of voice disorder. Therefore, voice signal can be a useful tool to diagnose them. The awkwardness of analog equipments has simulated development of digital computer techniques for processing and analysis of pathological speech signal...

We present in this paper a voice conversion (VC) method for a person with an articulation disorder resulting from athetoid cerebral palsy. The movements of such speakers are limited by their athetoid symptoms, and their consonants are often unstable or unclear, which makes it difficult for them to communicate. In this paper, exemplar-based spectral conversion using Nonnegative Matrix Factorizat...

Introduction: Xanthoma disseminatum (XD) is a rare, benign, non-Langerhans cell histiocytic disorder with unknown etio-pathology. It manifests with multiple, grouped, red-brown to yellow papules and nodules involving the skin, mucous membranes, and internal organs with a predilection for flexures and the face.  Case Report: We report a patient who presented with disseminated xanthomatous pa...