Electronic stethoscope with specially developed high fidelity microphone that filters out external sounds. Provides wide range of frequencies, 250 to 1,500 hz. Overall amplitude, over 40 decibels. Microphone, ceramic type. Receiver, impedance 400 ohms. POWER: 9 volt battery. Power consumption .08 to 3.5 MA.
---- PROTOTYPE --------- PURPOSE: To design a prototype of an optical stethoscope for people who are deaf or hard of hearing. The Optical Stethoscope provides an digital display of a person's pulse rate when the instrument is placed the person's chest in the vicinity of the heart. It also will provide a graphic representation of the pulse, similar to an electrocardiogram. It can also be used to display stomach fluid or breath sounds in waveform. TITLE: Optical Heartbeat For Better Diagnosis. WEB