A High Performance Computer Model for Sound Propagation in Human Thorax

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Title: A High Performance Computer Model for Sound Propagation in Human Thorax
Author: Narasimhan, Chandrasegaran
Advisors: Dr G M Kumar, Chair
Dr M Guddati, Co-Chair
Dr J Baugh Jr, Member
Abstract: The purpose of the research has been to develop a mathematical-computer model for sound propagation in human thorax. One of the major advantage of this model is the incorporation of the visible human male data set to have an accurate representation of human thorax. The visible human male data set consists of CT images of a human body at a resolution of 1mm by 1mm by 1mm. Various types of simulations were performed at 4mm by 4mm by 4mm CT image resolution and acoustic pressures were sampled at four different points with in the thorax. The results were analyzed in time and frequency domains. The results from the analysis suggest that frequencies of the order of 100Hz are most effectively transmitted through the thorax and there seems to be a resonance effect at 1500Hz. Further analysis indicates that the resonance frequency could be due to the spatial confinement of the sound waves within the thorax. The model also exhibits a spatial inhomogeneity of sound propagation. The results confirm that the size of the thorax can play a significant role in the type of sound generated at the chest wall.
Date: 2001-12-19
Degree: Master of
Discipline: Civil Engineering
URI: http://www.lib.ncsu.edu/resolver/1840.16/2740

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