FFT-based digital tactile vocoder system for real-time use

O. Özdamar, C. N. Lopez, D. K. Oller, R. E. Eilers, E. Miskiel, M. P. Lynch

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A microprocessor-based real-time digital vibrotactile vocoder system has been developed to train the deaf and for artificial hearing research. The system is composed of a microcomputer module with a digital signal processor interface units and an attenuator/driver circuit. Live or digitised (stored or synthetic) speech is presented to the skin spectrally through a belt housing eight or 16 vibrators. Speech is processed in real time using a fast Fourier transform. The system is also capable of presenting any arbitrary spatiotemporal pattern on the skin for artificial hearing experiments. A preliminary experiment with a deaf subject indicates that the system is potentially an effective device for artificial hearing.

Original languageEnglish (US)
Pages (from-to)213-218
Number of pages6
JournalMedical & Biological Engineering & Computing
Issue number2
StatePublished - Mar 1 1992


  • FFT
  • Hearing prosthesis
  • Speech processors
  • Tactile aids
  • Vocoders

ASJC Scopus subject areas

  • Health Information Management
  • Health Informatics
  • Biomedical Engineering
  • Computer Science Applications
  • Computational Theory and Mathematics


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