Detecting Surrounding Users by Reverberation Analysis with a Smart Speaker and Microphone Array

Naoki Yoneoka, Yutaka Arakawa, Keiichi Yasumoto

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Recently, smart speakers like Amazon Echo and Google Home have been spread widely. Those devices support users' life through voice interface by receiving voice commands to operate appliances and order goods to online shops. Meanwhile, it is reported that smart speakers are vulnerable to some malicious attacks which steal personal information and/or order unnecessary goods by uttering voice from a device nearby the speaker, abusing the fact that the smart speakers cannot distinguish human voice from machine voice. A new type of attack called DolphinAttack which utters ultrasonic voice inaudible to human is also reported. Therefore, a method to identify which of human or machine is sending voice commands to a smart speaker is desired. In this paper, to prevent such machine-voice based attacks to a smart speaker in absence of residents, we propose a system consisting of a speaker and a microphone array to detect the existence of a human nearby, supposing it can be incorporated in a smart speaker in the future. In our proposed system, the speaker emits sonar sound generated based on Orthogonal Frequency Division Multiplexing (OFDM) in all directions, the microphone array with 8 channels attached on top of the speaker receives the reflected sound, and the human existence is judged by comparing the reflected sound with that measured in the same environment without human. Through experiments with a prototype system, we confirmed that our proposed system can detect the human existence by measuring the reflected signal of 0.5 second.

本文言語英語
ホスト出版物のタイトル2019 IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2019
出版社Institute of Electrical and Electronics Engineers Inc.
ページ523-528
ページ数6
ISBN(電子版)9781538691519
DOI
出版ステータス出版済み - 3 1 2019
イベント2019 IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2019 - Kyoto, 日本
継続期間: 3 11 20193 15 2019

出版物シリーズ

名前2019 IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2019

会議

会議2019 IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2019
国/地域日本
CityKyoto
Period3/11/193/15/19

All Science Journal Classification (ASJC) codes

  • コンピュータ ネットワークおよび通信
  • コンピュータ サイエンスの応用
  • 情報システムおよび情報管理
  • 人工知能

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