Low-cost fiber bragg grating vibroacoustic sensor for voice and heartbeat detection

Daniele Tosi, Massimo Olivero, Guido Perrone

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


A fiber Bragg grating (FBG) -vibroacoustic sensor exploiting an intensity-based interrogation principle is presented. The optical system is complemented by signal processing techniques that allow disturbances to be mitigated and improve the spectral estimation. The sensor is capable of performing frequency analysis of sounds up to 3 kHz, with top sensitivity in the 100-500 Hz frequency range, and of dynamically tracking pulsed phenomena that induce a strain to the FBG. The sensor has been applied to the detection of voice, showing a great intelligibility of the speech despite the low-quality environment, and to the monitoring of the heartbeat rate from the wrist.

Original languageEnglish
Pages (from-to)5123-5129
Number of pages7
JournalApplied Optics
Issue number28
Publication statusPublished - Oct 1 2008

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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