Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Heart Sound"”.
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Wearable Heart Sound and EKG Recorder
<p>Acute congestive heart failure is a leading cause of morbidity and mortality. Patients often undergo repeated hospitalizations with an annual cost in excess of $32B dollars. Early detection of impending acute congestion allows for pharmaceutical interdiction that prevents hospitalization, …
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A Comparison of Wavelet and Simplicity-Based Heart Sound and Murmur Segmentation Methods
… commonly used medical devices for diagnosing heart conditions because they are inexpensive, noninvasive, and light enough to be carried around by a clinician. Auscultation with a stethoscope requires considerable skill and experience, but the introduction of digital stethoscopes allows for the …
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An interactive computer analysis of the aortic ejection click and first heart sound
The aortic ejection click and the first heart sound (S1) are described in the time and frequency domains from computer processed phonocardiogram data obtained from 13 valvar aortic stenosis patients and 6 normal ones. The interactive FOBTRAI program developed was capable of the following: (1) …
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Development of novel optical sensing-based digital stethoscopes and deep learning-based heart sound denoising algorithms
… digital stethoscopes and deep learning-based heart sound denoising algorithms. Cardiac auscultation is the act of listening non-invasively to the sounds of the heart. It provides insights into the mechanical activity of the heart, and the sounds produced by this activity can be recorded as a …
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An intelligent diagnostic system for screening newborns
… and develop an intelligent system for analyzing heart sound signals, able to support physicians in the diagnosis of heart diseases in newborns. Many studies have been conducted in recent years to automatically differentiate normal heart sounds from heart sounds with pathological murmurs using …
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Design, Characterization and Application of a Multiple Input Stethoscope Apparatus
… it can digitally capture the same important body sounds investigated with standard acoustic stethoscopes; especially heart sounds. Acoustic signal inputs from each diaphragm are converted to electrical signals through microphone pickups installed in the stethoscope connective tubing; and are …
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Measurement and analysis of breath sounds
Existing breath sound measurement systems and possible new methods have been critically investigated. The frequency response of each part of the measurement system has been studied. Emphasis has been placed on frequency response of acoustic sensors; especially, a method to study a diaphragm type …
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AI Approaches for Feature Extraction in Multimodal Biomedical Data
… in the coronary arteries from human heart sound data. AxoDetect excels at segmenting nerves without requiring labeled datasets, segmenting between ten to one hundred times faster than similar deep learning methods. The models which are functionalized and constructed by the software …
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ECG Sonification to Support Diagnosis and Monitoring of Cardiac Pathologies
… references of listening to internal body sounds for diagnosis purposes can be traced back to ancient Egypt. <br /><br /> The field of sonification, although relatively new, has opened multiple opportunities to explore different types of data from its auditory representation. For instance, …
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High-Performance Accelerometer Based On Asymmetric Gapped Cantilevers For Physiological Acoustic Sensing
… or mobile monitoring of physiological sounds is expected to play important role in the emerging mobile healthcare field. Because of the miniature size, low cost, and easy installation, accelerometer is an excellent choice for continuous physiological acoustic signal monitoring. However, …
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Toward Wireless Wearable Devices Based on Biocompatible AlN Piezoelectric Sensors for Multiple Biosignal Monitoring
L'abstract è presente nell'allegato / the abstract is in the attachment
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DIGITAL ANALYSIS OF CARDIAC ACOUSTIC SIGNALS IN CHILDREN
… tool for analysis of cardiac acoustic signals. Heart sounds and murmurs were recorded in 360 children with a single-channel device and in 15 children with a multiple-channel device. Time intervals between acoustic signals were measured. Short-time Fourier transform (STFT) analysis was used to …