Accession Number:

ADA409711

Title:

Time-Frequency Cardiac Passive Acoustic Localization

Descriptive Note:

Corporate Author:

TUBITAK MARMARA RESEARCH CENTER KOCAELI(TURKEY)

Personal Author(s):

Report Date:

2001-10-25

Pagination or Media Count:

5.0

Abstract:

In a previous work, the authors have used a novel, radically different approach based on concurrent multi-sensor array measurements and super-resolution array processing scheme for phonocardiographic signals. Using a specially designed passive acoustic array, acoustic images corresponding to the various distinct phases of the heartbeat were obtained. In this paper, this approach is extended using a novel framework, called Time- Frequency Cardiac Passive Acoustic Localization TF- CARDIOPAL. The Choi-Williams distribution is utilized - to calculate a spatial time-frequency matrix to - characterize the spatial time-frequency distribution for the nonstationary array signals. Distinctive components of this matrix on the time-frequency plane yield important clues on possible source locations in the heart. This finding has been used in extracting localization information from the first heart sound signals from a - healthy human subject. Meaningful source localization results that are well correlated with the mechanical - activation of the heart are obtained.

Subject Categories:

  • Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE