Title :
Spectral analysis of the turbulent sounds caused by femoral artery stenosis in dogs
Author :
Akay, Yasemin M. ; Akay, Metin ; Welkowitz, W. ; Semmlow, John L. ; Lewkowicz, S.
Author_Institution :
Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
Sounds created by a controlled occlusion in the femoral artery of dogs were detected and analyzed by using the fast Fourier transform and autoregressive methods after adaptive filtering. The femoral vessel size and flow were chosen to approximate coronary artery conditions in patients. This work was done to confirm the hypothesis that coronary stenosis produces a detachable auditory correlate. Results confirm that high-frequency acoustic energy between 200 and 800 Hz is associated with turbulence produced by stenosis.
Keywords :
bioacoustics; fast Fourier transforms; haemodynamics; spectral analysis; 200 to 800 Hz; adaptive filtering; autoregressive methods; blood flow; blood velocity; controlled occlusion; coronary artery conditions; detachable auditory correlate; dogs; fast Fourier transform; femoral artery stenosis; femoral vessel flow; femoral vessel size; high-frequency acoustic energy; spectral analysis; turbulent sounds; Acoustic noise; Acoustic signal detection; Adaptive filters; Arteries; Biomedical engineering; Delay; Dogs; Error correction; Frequency estimation; Spectral analysis;
Conference_Titel :
Bioengineering Conference, 1992., Proceedings of the 1992 Eighteenth IEEE Annual Northeast
Conference_Location :
Kingston, RI, USA
Print_ISBN :
0-7803-0902-2
DOI :
10.1109/NEBC.1992.285983
