Document Type thesis Author Name Pelteku, Altin E. URN etd-0114104-142855 Title Development of an Electromagnetic Glottal Waveform Sensor for Applications in High Acoustic Noise Environments Degree MS Department Electrical & Computer Engineering Advisors Reinhold Ludwig, Advisor Gene Bogdanov, Committee Member Hossein Hakim, Committee Member Donald R. Brown, Committee Member Fred J. Looft, Department Head Keywords basis functions perfectly matched layers PML neck model parallel plate resonator finite element circulator glottal waveform multi-transmission line dielectric properties of human tissues radiation currents weighted residuals non-acoustic sensor Date of Presentation/Defense 2004-01-14 Availability unrestricted
The challenges of measuring speech signals in the presence of a strong background noise cannot be easily addressed with traditional acoustic technology. A recent solution to the problem considers combining acoustic sensor measurements with real-time, non-acoustic detection of an aspect of the speech production process. While significant advancements have been made in that area using low-power radar-based techniques, drawbacks inherent to the operation of such sensors are yet to be surmounted. Therefore, one imperative scientific objective is to devise new, non-invasive non-acoustic sensor topologies that offer improvements regarding sensitivity, robustness, and acoustic bandwidth.
This project investigates a novel design that directly senses the glottal flow waveform by measuring variations in the electromagnetic properties of neck tissues during voiced segments of speech. The approach is to explore two distinct sensor configurations, namely the “six-element” and the “parallel-plate” resonator. The research focuses on the modeling aspect of the biological load and the resonator prototypes using multi-transmission line (MTL) and finite element (FE) simulation tools. Finally, bench tests performed with both prototypes on phantom loads as well as human subjects are presented.
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