in the field of bioacoustics (primarily for the analysis of bird calls and whale
sounds), with the result that the necessary software is easily obtained. (There's even an iPad app!). Since this technology is completely noninvasive and quite inexpensive, I expect that the application of spectrographic techniques to phonocardiography and acoustic respiratory monitoring to grow substantially as ongoing research demonstrates its utility in various clinical settings. For instance, changes in cardiac contractility or episodes of myocardial depression just might be reflected by alterations in the corresponding phonocardiographic color spectrographic signature. In the inventions tab of this Web site I show what can be done to make your own simple acoustics respiratory recording setup using a simple Radio Shack microphone and some computer equipment.