Evaluation of tooth-conduction microphone for communication under noisy environment

Yusuke Torikai, Dai Kuze, Junko Kurosawa, Yasuhiro Oikawa, Yoshio Yamasaki

Research output: Contribution to journalArticlepeer-review


We investigated a new communication-aid system focused on bone-conduction through a tooth, for listening to and recording voices. In this paper, we developed a tooth-conduction microphone (TCM) and evaluate the articulation of tooth-conducted voice (TCV). Because the TCM has the shape of one's dental mold, it is wearable like a mouthpiece. Moreover, it can extract tooth vibration during phonation as TCV. To evaluate articulation of TCV, we adopted monosyllable articulation for subjective assessment and linear predictive coding cepstral distance for objective assessment. The results of articulation show that TCV is not sufficiently clear compared to airconducted. However, it is confirmed that TCV is robust to environmental noise because the accuracy rate is not decreased when the TCV is recorded under high ambient noise.

Original languageEnglish
Pages (from-to)500-506
Number of pages7
JournalAcoustical Science and Technology
Issue number6
Publication statusPublished - 2015


  • Bone-conducted voice
  • Communication-aid
  • Piezoelectric device
  • Tooth-conducted voice
  • Voice acquisition

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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