| 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 |
| 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. |