TY - RPRT TI - Estimation of frequency-dependent attenuation based on parametric spectral analysis and correlation lags of the demodulated echo signal. AU - A Lymberis AU - A Herment AU - G Demoment AU - C Fric PY - 1991 DO - 10.1177/016173469101300101 UR - https://pubmed.ncbi.nlm.nih.gov/1998246/ ID - 1998246 ER -