The human brain has several centres responsible for the programming of the speech. In the event of damage to at least one of them are noticeable changes in the speech. The most common cause of these damages is damages caused by the vascular damage, i.e. strokes. Patients speak slowly; sometimes they are unable to articulate any sound. Along with the progress of hospitalisation in their ability ...

    Background: Parkinson’s disease (PD) is a progressive neurological disorder and many PD patients experience some type of voice and speech disorders during the course of illness. In this study, the aim was to investigate the effect of Lee Silverman voice treatment (LSVT) on improving voice difficulties in patients with mild PD using voice handicap index (VHI).    Methods: This interventiona...

Historically, Telecom Networks were a Mixture of TDM/Circuit Switched and Packet/Datagram based and used techniques such as TDMoIP and IPoTDM for internetwork communication. Voice and Data Networks were separate. NGN was envisioned as a pathway towards a converged ALL-IP network capable to cater to Voice, Video and Data services. Around 2005, newer services such as SAN’s, NAS’s, CDN’s, WSNs, Lo...

Network access systems (NAS) such as digital loop carriers (DLC) are increasingly utilizing a shared medium, such as Hybrid Fiber Coax (HFC) to provide point to multi-point access from the public switched telephone network (PSTN) to the end user (consumer). New services, such as direct access to the packet switched network (PSN, WWW) have been added to DLC equipment in such a way as to provide ...

ions based ... on the perceptual equipment of the transcriber, classical phoneme theory took them as categories of phonetic description, identifiable in a language-independent way.” (Hb p. 352) Inverting this statement leads to the conclusion that L. takes the non-phone-related instrumental VOT measure as the raw data and a faithful representation of what the speaker really produces. He obvious...

Background: Vocal abuse and misuse would result in vocal fold polyp. Certain features define the extent of vocal folds polyp effects on voice acoustic parameters. The present study aimed to define the effects of polyp size on acoustic voice parameters, and compare these parameters in hemorrhagic and non-hemorrhagic polyps.Methods: In the present retrospective study, 28 individuals with hemorrha...

Voice Activity Detectors (VAD's) are widely used in speech technology applications where available transmission or storage capacity is limited (e.g. mobile, DCME, etc.) and must be utilised with maximum economy. Modern day digital speech coding algorithms can provide toll quality speech at bit-rates as low as 8kbit/s (e.g. ITU-T G.729) and the use of a VAD can achieve further economy in average...

Speech constitutes much of the communicated information; most other perceived audio signals do not carry nearly as much information. Indeed, much of the non-speech signals maybe classified as ‘noise’ in human communication. The process of separating conversational speech and noise is termed voice activity detection (VAD). This paper describes a new approach to VAD which is based on the Wavelet ...