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

fYear

1989

Firstpage

57

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IEMBS.1989.95569

Filename

95569