Abstract: A computer site includes a data generating source. In one implementation, the source includes a device that can be manipulated by a patient to sense some function or condition of the patient. One example is a heart monitor that a patient can hold against his or her chest. The device outputs an audible signal responsive to the function or condition, such as the beating of the heart. A computer that can be operated by the patient or other initial user at the site runs a program that processes an electric signal generated in response to the audible signal as received through a microphone connected to the computer. The program is downloaded or otherwise accessed through a computer communication network, such as the Internet. The computer sends resulting data signals over the computer communication network.