Spectral analysis of arterial bruits (phonoangiography): experimental validation.

Abstract

Initial studies in our laboratory suggested a com- plex relationship between residual lumen diameter at a stenosis, flow velocity and the power spectrum of the sound produced,1' 2 but further theoretical analysis3 and a sizeable clinical experience3-5 confirmed that the simple relationship f0d = SU accurately describes the production of sound by a vascular stenosis, where f. is