In-ear Microphone Hybrid Speech Enhancement

N. Westerlund, M. Dahl, and I. Claesson (Sweden)


Speech and Acoustic Processing, Active Noise Control,Spectral Subtraction, Ear-Mic.


This paper presents a novel speech enhancement approach for performing noise reduction in severely disturbed envi ronments. A small microphone for communication pur poses is placed inside the external auditory canal to pick up the speech signal originating from the speech produc tion organ. The speech enhancement is achieved by using three different noise reduction methods: High frequencies are attenuated by passive absorbers, low frequency compo nents are attenuated by employing active noise control and finally a broadband noise reduction is achieved by using spectral subtraction.

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