Title :
High sensitivity PCG transducer for extended frequency applications
Author :
Padmanabhan, Vineet ; Fischer, R. ; Semmlow, J.L. ; Welkowitz, W.
Author_Institution :
Dept. of Biomedical Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
A transducer for improved detection of heart sounds in the high-frequency ranges (up to 2 kHz) is described. The transducer is a piezoelectric-type accelerometer which presents a low load to the chest wall, providing greater sensitivity at high frequencies as compared to several commercially available microphones. The transducer has good noise characteristics, has flexible design parameters, and is cost effective. The accelerometer has been used for acquisition of low-level diastolic heart sounds in the detection of coronary artery disease. Successful preliminary results indicate the usefulness of this transducer for other high-frequency applications in phonocardiography
Keywords :
accelerometers; acoustoelectric transducers; bioacoustics; biomedical equipment; cardiology; chest wall; coronary artery disease detection; flexible design parameters; heart sounds detection; low-level diastolic heart sounds; microphones; noise characteristics; phonocardiography; piezoelectric-type accelerometer; Accelerometers; Acoustic beams; Acoustic noise; Acoustic transducers; Biomedical transducers; Coronary arteriosclerosis; Frequency; Heart; Microphones; Piezoelectric transducers;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95569
