Audio-biofeedback for balance improvement: An accelerometry-based system

Lorenzo Chiari, Marco Dozza, Angelo Cappello, Fay B. Horak, Velio Macellari, Daniele Giansanti

Research output: Contribution to journalArticlepeer-review

139 Scopus citations


This paper introduces a prototype audio-biofeedback system for balance improvement through the sonification using trunk kinematic information. In tests of this system, normal healthy subjects performed several trials in which they stood quietly in three sensory conditions while wearing an accelerometric sensory unit and headphones. The audio-biofeedback system converted in real-time the two-dimensional horizontal trunk accelerations into a stereo sound by modulating its frequency, level, and left/right balance. Preliminary results showed that subjects improved balance using this audio-biofeedback system and that this improvement was greater the more that balance was challenged by absent or unreliable sensory cues. In addition, high correlations were found between the center of pressure displacement and trunk acceleration, suggesting accelerometers may be useful for quantifying standing balance.

Original languageEnglish (US)
Pages (from-to)2108-2111
Number of pages4
JournalIEEE Transactions on Biomedical Engineering
Issue number12
StatePublished - Dec 2005


  • Accelerometer
  • Acoustic feedback
  • Balance
  • Force plate
  • Portable sensor
  • Postural control
  • Prosthesis

ASJC Scopus subject areas

  • Biomedical Engineering


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