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A novel real-time noise reduction system for the assessment of evoked otoacoustic emissions |
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| Authors: | Kompis M Oberli M Brugger U |
| Affiliation: | a University Clinic of ENT, Head and Neck Surgery, Inselspital, 3010 Bern, Switzerland b Signal Processing Laboratory, School of Engineering, 3400 Burgdorf, Switzerland |
| Abstract: | A novel noise reduction method and apparatus to be used in connection with the measurement of evoked otoacoustic emissions (EOAE) are presented. The noise reduction method is based on an adaptive noise canceller and requires a noise-only reference microphone placed in the vicinity of the OAE-probe. The method was implemented in real time on a custom built digital signal processing system using an Analog Devices ADSP-2181 digital signal processor. The system interfaces seamlessly with a commercial EOAE acquisition system. Results of a series of experiments show than noise reductions of 7–8 dB can be reached. |
| Keywords: | Adaptive noise cancellation Digital signal processing Hearing disorders Noise reduction Otoacoustic emissions Real-time signal processing |
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