Title :
Heart sounds analysis in joint time-frequency domain
Author :
Jing, Wang ; Liangjun, Weng ; Jue, Wang ; Jingzhi, Cheng
Author_Institution :
Dept. of Biomed. Eng., Xi´´an Jiaotong Univ., China
Abstract :
Proposes a new technique of signal processing in joint time-frequency domain as resonance time-frequency analysis for analysis of heart sounds. Generated by mechanical vibration of the heart and cardiovascular system, heart sounds provide abundant physiological information, while the measurement is noninvasive and low cost. The resonance enemy distribution defined here exhibits clearly how signal frequency contents change in time, and can be calculated by a fast algorithm. Applications of this technique to heart sounds analysis show that the frequency contents in the first heart sound S1 and the second heart sound S2 are centred mainly from 100 Hz to 130 Hz while the frequency contents in systolic “kala” murmurs mainly distribute discontinuously from 90 Hz to 210 Hz. This technique is helpful for estimation of functional heart state and diagnosis of heart diseases in clinical research
Keywords :
bioacoustics; cardiology; medical signal processing; time-frequency analysis; 90 to 210 Hz; clinical research; discontinuous distribution; fast algorithm; first heart sound; functional heart state; heart diseases diagnosis; heart sounds analysis; joint time-frequency domain; mechanical vibration; second heart sound; systolic “kala” murmurs; Acoustic signal processing; Cardiovascular system; Costs; Frequency estimation; Heart; Mechanical variables measurement; Resonance; Signal analysis; Time frequency analysis; Vibration measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995 and 14th Conference of the Biomedical Engineering Society of India. An International Meeting, Proceedings of the First Regional Conference., IEEE
Conference_Location :
New Delhi
Print_ISBN :
0-7803-2711-X
DOI :
10.1109/RCEMBS.1995.511716
