Downloadable mobile application software featuring a database of recorded heart and lung sounds for use as a teaching aid in training auscultation and cardiovascular and pulmonary diagnostics; downloadable mobile application software featuring a database of recorded heart and lung sounds for use by medical personnel in improving the ability to recognize benign and pathological heart sounds and murmurs; downloadable mobile application software for providing continuing professional education and training for medical personnel in the field of auscultation and cardiovascular and pulmonary diagnostics.