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Title Improvement of Voice Quality using a Digital Filter to Compensate for the Spatial Characteristics of MEMS Microphone Chambers
Authors (Hyun-Kab Kim) ; (Gyu-Sik Kim) ; (Jongseol Lee)
DOI https://doi.org/10.5573/IEIESPC.2021.10.2.176
Page pp.176-181
ISSN 2287-5255
Keywords Digital filter; Digital signal processing; Installation space; MEMS microphone; Voice quality
Abstract Micro-electromechanical system (MEMS) microphones are sound sensors that are widely used in modern mobile and Internet-of-Things devices. Their market share is rapidly increasing due to their small size, excellent performance characteristics, and low power consumption. However, studies have focused on improving module performance without any spatial considerations. Most voice recognition devices have a small internal chamber in which a sensor is installed. A chamber with an open hole serves as a resonator, which alters the MEMS microphone’s characteristics. The aim of this study is to improve voice quality by using a digital filter to compensate for the effect of the chamber. This will allow the identification of frequency-response compensation characteristics and the acquisition of base data that can be used for product design.