Patent ID: 8888701

Claim:
A monitoring apparatus comprising: a housing configured to be positioned within an ear of a subject; and a sensor module disposed within the housing, the sensor module comprising: a printed circuit board (PCB) having opposite first and second sides; an optical emitter attached to the first side of the PCB, wherein the optical emitter directs modulated electromagnetic radiation at a target region of the ear; an optical detector attached to the first side of the PCB adjacent to the optical emitter, wherein the optical detector detects an energy response signal from the subject that is associated with a physiological condition of the subject; an optical filter overlying at least a portion of the optical detector, wherein the optical filter attenuates time-varying environmental light interference at one or more selected wavelengths from the energy response signal, wherein the time-varying environmental light interference is caused by sunlight and/or ambient light; and at least one processor that controls operations of the optical emitter and/or optical detector.