This paper describes a prototype system for the intelligent classification of electrolaryngograph (EGG) signals in order to provide an objective assessment of voice quality in patients at different stages of recovery after treatment for larynx cancer. The system extracts salient short-term and longterm time-domain and frequency-domain parameters from EGG signals taken from male patients steadil...

conclusions significant difference in the fundamental frequency, jitter, shimmer, silence duration, friction duration, vocalization duration, and vocal cords contact quality index between the two groups was observed (p < 0.01). results the mean of fundamental frequency for the hearing loss children and the control group were 323.04 hz and 267.53 hz, jitter 10.05% and 1.52%, shimmer 17.24 and 5....

The use of computer-based real-time visual displays is now well established in voice clinics. A number of situations exist, however, where a computer-based system is inconvenient and a battery-powered hand-held version would be preferred. This would, for example, enable voice monitoring to be carried out at any time and place, including during home visits. This paper describes a purpose-built d...

This paper reports a study on short-time subharmonic pitch breaks in vocal fold vibration, which are found to be a common feature of the human voice in spoken language. The observed pitch breaks correspond to a change in periodicity of the electrolaryngograph (Lx) signal. This paper presents a nonlinear dynamical system capable of producing time-series with subharmonic pitch breaks. The resulti...

Four examples of the use of vocal fold contact phase measurement are discussed for unilateral paresis. In each case this aspect of voice quality is of greater importance than the physical measurement of loudness and pitch related parameters. For three of the cases electrostimulation has been used as a main part of the treatment. Phonation in both connected speech and, for comparison, in sustain...

Objective assessment techniques for classifying voice quality for patients recovering from treatment for cancer of the larynx should lead to more effective recovery than the present approach, which is very subjective and depends heavily on the experience of the individual Speech and Language Therapist (SALT). This work follows an earlier study where an Artificial Neural Network (ANN) was traine...

during pregnancy significant changes in bodily tissues occur. for example, the cervix undergoes deep structural/biomechanical alterations due to an increase in concentration of progesterone. previous studies have found a significant correlation between the changes that both cervical and vocal fold smears undergo during the menstrual cycle, demonstrating a relevant hormonal influence on laryngea...

A system of fundamental frequency analysis and normalisation is described for obtaining pitch data and comparing them across speakers. This system was used for the analysis of English and Spanish speakers' productions in order to compare the realization of accentual focus in the two languages. The system is based on the simultaneous recording of speech and the laryngeal signal. The latter is mo...

Classification of speech data from male volunteers (normal) and patients recovering from cancer of the larynx (abnormal) is discussed. Analysis of normals and abnormals has shown that there is a significant distinction in the fundamental frequency and harmonic envelope between these groups during constant phonation of vowel sounds. This work proposes a method of deriving the Fundamental-Harmoni...

Objective spectral reference standards for normal vowel phonation are described. Application in larynx cancer monitoring is envisaged. 120 individuals contributed to a database of vowels lad and /i/ in the form of trans-larynx impedance time series captured using an electrolaryngograph. The impedance signals are used for iterated power spectral estimation followed by spectral intra-pooling for ...