Stethoscopes; Electronic stethoscopes with or without EKG function; Electronic stethoscopes having a removable headset; Electronic stethoscopes with or without EKG function and removable headset; Electronic stethoscopes with or without an EKG function and removable headset which can be interchanged with other accessories; Electronic stethoscopes with or without an EKG function and removable headset which may be interchanged with a an audio speaker; Stethoscopes for diagnostic medical tests comprised of a bodily sound detection sensor, a headset for listening to sounds, which may be wireless; stethoscopes with a broadband wireless internet connection, control buttons and screen display, a converging light source and one or more electrocardiogram electrodes or sensors, but specifically excluding catheters for delivery of drugs or fluids and controllers and power units for infusion catheters or ultrasonic drug delivery and drug activation apparatus and controllers and power units therefore, minimally-invasive devices or invasive devices