In this work we analyze the parameter-to-solution map of the acoustic wave equation with respect to its parameters wave speed and mass density. This map is a mathematical model for the seismic inverse problem where one wants to recover the parameters from measurements of the acoustic potential. We show its complete continuity and Fréchet differentiability. To this end we provide necessary exist...

In the parameter region for sonoluminescence of a single levitated bubble in a water-filled resonator it is observed that the bubble may have an enormous spatial stability leaving it "pinned" in the fluid and allowing it to emit light pulses of picosecond accuracy. We report here observations of a complex harmonic structure in the acoustic field surrounding a sonoluminescing bubble. We show tha...

A structural shape optimization problem, with respect to the structural aspect ratio is developed in the context of an axisymmetric structural-acoustic system, consisting of an elastic dome coupled with an internal acoustic cavity, is analyzed in the lowand medium-frequency ranges. The dome is a thin shell considered as a three-dimensional continuum with a dissipative constitutive equation. The...

This paper introduces kernel regression mapping sonification (KRMS) for optimized mappings between data features and the parameter space of Parameter Mapping Sonification. Kernel regression allows to map data spaces to highdimensional parameter spaces such that specific locations in data space with pre-determined extent are represented by selected acoustic parameter vectors. Thereby, specifical...

In recent years, acoustic-phonetic features (APF) have received great interest as a replacement for phones in automatic speech recognition (ASR) systems. Many studies have focused on improving feature sets and acoustic parameters to describe the APFs. Invariably, these are developed and tested on a limited number of well-researched databases containing read speech. When tested on conversational...

Previous research [1, 2] shows that articulatory variability is reduced for people with flatter palates. It has been hypothesized [1] that this is because the mapping between articulation and acoustics is more linear for flatter than for more domed palates. A combination of two synthesizers were used to model how vocal tract anatomy influences the mapping of articulation onto acoustics, using A...

Evaluating spoken grammar skills is an important component of evaluating the overall spoken English skills of a candidate. This paper presents a novel approach that incorporates the knowledge of acoustic-phonetics to improve the performance of an existing spoken grammar evaluation technique in a questionanswer paradigm. A novel acoustic parameter, Onset Coherence, to make a one-pass distinction...