The purpose of this study was to evaluate quantitatively the parameters of the video laryngostroboscopy (VLS) and determine correlations between the VLS parameters and acoustic vocal function parameters. Digital VLS recordings, acoustic voice assessment, calculation of dysphonia severity index (DSI) and registration of voice range profile (VRP) were performed for 206 individuals: 50 healthy and...

This paper explores methods for characterising individual voices using different vocal tract output measures. Mel frequency cepstral coefficients (MFCCs), long-term formant distributions (LTFDs) and scores based on vocal profile analysis (VPA) of long-term supralaryngeal settings were extracted from the same corpus of recordings. Distances between speakers were calculated and used to test the i...

This study examines possible differences between the acoustic realization of the intersibilant contrast /s/~/ʃ/ in German and American English. A range of acoustic parameters (COG, standard deviation, skewness, kurtosis and Discrete Cosine Transformation coefficients) are calculated to characterize the spectra of the two sibilants. Significant differences are found between the male and female i...

In the past few decades, the issue of environmental quality in the urban environment is a recurring theme. Green walls and roofs have demonstrated great efficiency in the attenuation of adverse effects such as heat islands. The thermal characterization of these systems are well studied, however few studies have been carried out on their acoustic potential. The characterization of the acoustic p...

In this paper we apply Bayesian networks to the problem of voicemail transcription. We use a Bayesian network system to test a variety of probabilistic models that model acoustic context in addition to phonetic state and acoustic observations. We use a context variable that has the ability to model contextual phenomena that are not implied by the linguistic sequence of phones (e.g. noise level ...

This paper considers the common sonobuoy configuration comprising two horizontal dipoles mounted orthogonally together with an omnidirectional sensor. Under the assumption that, within a narrow frequency band of interest, the acoustic power impinging on the sonobuoy consists of uncorrelated Gaussian noise processes, the paper examines how data collected by the sensor can be used to infer the di...

This paper investigates the relationship between formant frequencies and body size in human adults. In Experiment I, correlation coefficients were obtained between acoustic correlates of the five Spanish vowels uttered by 82 speakers as a function of speakers’ heights and weights. In Experiment II correlations were calculated from formant parameters obtained by means of a long-term average anal...

The use of porosity to modify the functional properties of piezoelectric ceramics is well known in the scientific literature as well as by the industry, and porous ceramic can be seen as a 2-phase composite. In the present work, examples are given of applications where controlled porosity is exploited in order to optimise the dielectric, piezoelectric and acoustic properties of the piezoceramic...