This paper describes the main improvements we made in two of the basic modules in our HMMbased large vocabulary speaker independent continuous speech recognition system: namely in the acoustic modelling and in the search engine. For the acoustic modelling, we paid special attention both to improved parameter tying at the density and at the state level, and to fast evaluation of the HMMs. For th...

Voice mimic systems using articulatory codebooks require an initial estimate of the vocal tract shape in the vicinity of the global optimum. For this purpose, we need to gather a large set of corresponding articulatory and acoustic data in the articulatory codebook. Thus, searching and accessing the codebook becomes a di cult task. In this paper, the design of an articulatory codebook is presen...

The purpose of this study is to evaluate the use of Acoustic Rhinometry in assessing surgical outcomes in sinonasal surgery. This prospective study was carried out from January till December 2001. A group of 44 patients who presented with nasal obstruction due to various rhinologic abnormality were examined with acoustic rhinometry pre and post-operatively. They were examined with acoustic rhin...

This paper investigates the statistical relationship between acoustic and visual speech features for vowels. We extract such features from our stereo vision AV speech data corpus of Australian English. A principal component analysis is performed to determine which data points of the parameter curve for each feature are the most important ones to represent the shape of each curve. This is follow...

Mortar samples were saturated with NaCl solutions of various concentrations and subjected to freeze– thaw cycles. Passive and active acoustic emission (AE) testing was conducted. The freezing temperature of the NaCl solutions in mortar corresponded with the sudden observation of passive AE events. The acoustic energy and damage parameter were calculated to evaluate the extent of freeze–thaw dam...

Xhosa is an African tone language spoken in South Africa. The relationship between the prosodic features duration, pitch and loudness of Xhosa commands was determined through acoustic analysis and perceptual experimentation. Combining the results of the acoustic analysis and the perceptual experiment proved to be an appropriate method of parameter extraction with which to formulate a prosodic m...

The flight path of an aircraft travelling at constant velocity and constant altitude is described by a set of five motion parameters which can be estimated using a ground-based wide aperture acoustic array. The narrowband motion parameter estimation method, based on the Doppler effect, requires the aircraft to emit an acoustic tone that is often absent in the case of a jet aircraft. The motion ...