HEARING-AID

a) Doctors who can hear and converse normally ; but have difficulty in hearing heart or lung sounds through a stethoscope. Or, those who have difficulty in picking up faint murmurs ; or, blood pressure sounds... b) Doctors who use a Hearing-Aid to compensate for mild to high neuro-sensory hearing loss. With the hearing-aid, they are able to listen and manage normal conversation ; but are unable to use the conventional stethoscope, which is so essential in their medical practice... Stethtron has a built-in miniature amplifier that gives 10 times the amplification of the conventional stethoscope. The volume can be adjusted by a graduated potentiometer. It uses an electronic Filter switch to differentiate sounds of variable pitch and special noise-reduction circuitry to minimize external noise.