Audible alarm signals for anaesthesia monitoring equipment

  • Lois M. Stanford
  • J. W. R. McIntyre
  • John T. Hogan


To address the problem of auditory alarms on anaesthesia monitoring and delivery devices whose signal is masked by the noises of other operating room equipment, a set of signals having the characteristics of spectral richness, frequency modulation, and temporal patterning were electronically generated, and were tested for detectability against operating room equipment noises in a laboratory setting. A set of signals was identified which can, under these circumstances, be detected with at least 93% accuracy at −24 dB signal-to-noise ratio.


anaesthesia delivery anaesthesia monitoring auditory alarms signal detection auditory perception alarm signals 


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Copyright information

© Martinus Nijhoff Publishers 1985

Authors and Affiliations

  • Lois M. Stanford
    • 1
  • J. W. R. McIntyre
    • 2
  • John T. Hogan
    • 1
  1. 1.Department of LinguisticsUniversity of AlbertaCanada
  2. 2.Department of AnaesthesiaUniversity of AlbertaEdmontonCanada

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