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Electrode Setup for Electromyography-Based Silent Speech Interfaces: A Pilot Study.

Inge Salomons1, Eder Del Blanco1, Eva Navas1

  • 1HiTZ Basque Center for Language Technology, University of the Basque Country, Ingeniero Torres Quevedo Plaza, 1, 48013 Bilbao, Spain.

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Summary

Researchers optimized electrode setups for a novel electromyography (EMG)-audio database, crucial for developing silent speech interfaces for Spanish laryngectomized speakers.

Keywords:
electromyographyphone classificationsilent speech recognition

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Area of Science:

  • Biomedical Engineering
  • Speech Technology
  • Rehabilitation Engineering

Background:

  • Electromyography (EMG) and audio data are essential for developing silent speech interfaces.
  • Limited information exists on optimal electrode configurations for speech-related EMG.
  • Laryngectomized speakers require advanced assistive communication technologies.

Purpose of the Study:

  • To define an optimal electrode setup for recording a parallel EMG-audio database.
  • To support the development of an EMG-based silent speech interface for Spanish laryngectomized individuals.

Main Methods:

  • Conducted pilot experiments with various electrode types (paired, concentric) and locations.
  • Targeted facial and neck muscles involved in speech production.
  • Evaluated electrode setup performance using a phone classification task with frame-based phone accuracy.

Main Results:

  • Identified an optimal 8-channel setup using bipolar single-electrode pairs.
  • Targeted muscles include digastric, depressor anguli oris, risorius, levator labii superioris, masseter, zygomaticus major, depressor labii superioris, and stylohyoid.
  • This configuration was used for the final database recordings.

Conclusions:

  • The study provides valuable insights into electrode setup selection for speech-related EMG.
  • The optimized setup facilitates the creation of a comprehensive EMG-audio database.
  • This research aids future researchers in designing their experimental setups for similar applications.