1. A method for cardio-acoustic signal analysis, comprising: receiving, via a signal receiver, a signal representative of heart sounds; transforming, via a processing unit, the received signal to represent a time, perceptual-frequency, amplitude domain; applying, via the processing unit, a human auditory system modeling algorithm to the time, perceptual frequency, amplitude domain representation to generate a time, perceptual-frequency, perceptual-loudness domain representation; and displaying, via a visualization unit, the received signal in the time, perceptual-frequency, perceptual-loudness domain representation.