Abstract :
With a conventional stethoscope it is difficult for the physician to analyze portions of the heart cycle he wants to hear, because of the abundance of noises that are of no interest to him in his examination. An electronic stethoscope, developed by Bell Aerosystems Co., enables the physician for the first time to eliminate by advanced electronic techniques all unwanted portions of the heartbeat cycle and bring into focus only those sounds of interest to him at the moment.
