Extrinsic Optical Fiber Sensor for Medical Audiometric Applications

The paper presents optical ber sensor designed for medical audiometric measurements. Currently, highly precise audiometric examinations require attachment of re ective element inside the ear. We propose alternative contactless optical and non-invasive method for audiometric applications. Presented sensor utilizes extrinsic intensity modulation combined with interferometric method to measure low amplitude vibrations with at frequency response curve and no resonance e ects. Experiment was performed with tympanic membrane model stimulated by external loudspeaker. Experimental results show usage possibility of presented sensor for laryngological and audiometric tests of ear membrane response, which is important for both diagnosis and implants sensitivity tting for people with hearing de cits.