Title :
Accelerometer type cardiac transducer for detection of low-level heart sounds
Author :
Padmanabhan, Vineet ; Semmlow, John L. ; Welkowitz, Walter
Author_Institution :
Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
The authors compare several different cardiac transducers and describe the development of a low-mass, accelerometer-type cardiac transducer which fulfils these objectives. The accelerometer weighs approximately 5 g and has a theoretical sensitivity of 125 mV/g in the frequency range 200-800 Hz. The basic design allows for easy modification of sensitivity and resonant frequency. This transducer has been effective in detecting sound associated with turbulent blood flow in partially occluded coronary arteries.
Keywords :
acoustic transducers; bioacoustics; biomedical equipment; cardiology; 200 to 800 Hz; low-level heart sounds detection; low-mass accelerometer-type cardiac transducer; medical instrumentation; partially occluded coronary arteries; resonant frequency; turbulent blood flow; Accelerometers; Acoustic noise; Acoustic transducers; Arteries; Biomedical engineering; Biomedical transducers; Blood flow; Coronary arteriosclerosis; Frequency; Heart; Resonant frequency; Adult; Aged; Angioplasty, Transluminal, Percutaneous Coronary; Artifacts; Calibration; Coronary Angiography; Coronary Disease; Equipment Design; Evaluation Studies as Topic; Female; Fourier Analysis; Hospitals, University; Humans; Male; Middle Aged; New Jersey; Phonocardiography; Regression Analysis; Sensitivity and Specificity; Signal Processing, Computer-Assisted; Transducers;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
