Mobile Computing, Applications, and Services. 9th International Conference, MobiCASE 2018, Osaka, Japan, February 28 – March 2, 2018, Proceedings

Research Article

Improving Ultrasound-Based Gesture Recognition by Partially Shielded Microphone

  • @INPROCEEDINGS{10.1007/978-3-319-90740-6_15,
        author={Hiroki Watanabe and Tsutomu Terada},
        title={Improving Ultrasound-Based Gesture Recognition by Partially Shielded Microphone},
        proceedings={Mobile Computing, Applications, and Services. 9th International Conference, MobiCASE 2018,  Osaka, Japan, February 28 -- March 2, 2018, Proceedings},
        proceedings_a={MOBICASE},
        year={2018},
        month={5},
        keywords={Gesture recognition Ultrasound Mobile computing Wearable computing},
        doi={10.1007/978-3-319-90740-6_15}
    }
    
  • Hiroki Watanabe
    Tsutomu Terada
    Year: 2018
    Improving Ultrasound-Based Gesture Recognition by Partially Shielded Microphone
    MOBICASE
    Springer
    DOI: 10.1007/978-3-319-90740-6_15
Hiroki Watanabe1,*, Tsutomu Terada2,*
  • 1: Hokkaido University
  • 2: Kobe University
*Contact email: hiroki.watanabe@ist.hokudai.ac.jp, tsutomu@eedept.kobe-u.ac.jp

Abstract

We propose a method to improve ultrasound-based in-air gesture recognition. Doppler effect is often used to recognize ultrasound-based gesture. However, increasing the number of gesture is difficult because of limited information obtained from that. In this study, we partially shield the microphone by a 3D printed cover. Acoustic characteristics of the microphone is changed by the cover, and it increases the obtained information. Since the proposed method utilizes a 3D printed cover and a pair of embedded speaker and microphone of a device, it does not require additional electrical device to improve gesture recognition. We implemented five microphone covers and investigated the performance of the proposed method in six gestures with four participants. Evaluation results confirmed that the recognition accuracy increased 12% in the most effective device by using the proposed method.