A method to generate a codebook with distributed formant targets and unique geometric-acoustic mapping from formants to vocal-tract shape by direct acoustic calculation is proposed. Geometric and acoustic constraints are applied to both vocal-tract model parameters and calculated acoustic features to eliminate unacceptable values from the initial codebook which usually has an extremely large co...

To study the acoustic properties of the Antarctic ice the South Pole Acoustic Test Setup (SPATS) was installed in the upper part of drill holes for the IceCube neutrino observatory. An important parameter for the design of a future acoustic neutrino telescope is the acoustic background noise in the ice and its spatial and temporal variations. We study the absolute noise level depth profile from...

This paper approaches the articulatory-to-acoustic speech production inverse case. A framework based on an explicit combination of vocal-tract morphological and acoustic constraints is proposed. The solution is based on a Fourier analysis of the vocal-tract log-area function: the relationship between the log-area Fourier cosine coe cients and the corresponding formants is used to formulate an a...

The throughput is an important parameter for label-free biosensors. Acoustic resonators like the quartz crystal microbalance have a low throughput because the number of sensors which can be used at the same time is limited. Here we present an array of 64 CMOS-integrated film bulk acoustic resonators. We compare the performance with surface plasmon resonance and the quartz crystal microbalance a...

In this article a new simplified LPV (Linear Parameter Varying) theoretical model is presented which corresponds to the acoustic response of an industrial plant. The parameters of this model vary with the characteristics of the closed room. The aim of the model is to locate mobile robots in such environments. A general methodology is proposed in order to simplify the robots self-localization pr...

An isentropic phase method is described for measuring in vitro the acoustic nonlinearity parameter B/A of several aqueous buffers, protein solutions, lipid oils, and emulsions. The technique relies upon the use of an acoustic interferometer to measure the small changes in sound speed that accompany a rapid hydrostatic pressure change of between one and two atmospheres. Average accuracies of 0.8...

The primary source of aircraft noise is the fan noise from the engines; natural approaches to reducing this noise involve acoustic shape optimization of the inlet and impedance optimization of the liner. This project will use optimal control to systematically determine the inlet shape and the linear material impedance factor that minimize the fan noise. A novel feature of this approach is that ...

• Characterize acoustic clutter in a manner that will lead to its mitigation. • Improve the understanding of the effects of seafloor morphology and composition on scattering and clutter. • Improve geo-acoustic parameter extraction from reverberation data. • Improve our understanding of the multi-static physical mechanisms (below 5kHz) which scatter incident energy into a receiver and which can ...

a) Develop the nonlinear acoustic theory of poroelastic media using Biot’s semilinear model and physical model of contact nonlinearity, b) Measure the nonlinear parameter of sediments in laboratory tank, c) Study the effect of sediment parameters (grain size distribution, free gas content, porosity) on nonlinear acoustic properties of the sediments, d) Evaluate the nonlinear absorption and dist...