Design of multimodal signals for the enhancement of warning signals in high noise environments

Conception de signaux multimodaux pour améliorer la détection des signaux d’alarme dans les environnements très bruyants


  1. Wong, W.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN);Toronto Univ, Toronto ONT (CAN) Dept of Electrical and Computer Engineering
This report summarizes the work completed in contract W7711-057945/A. The purpose of this contract was to conduct an experimental and theoretical investigation of the enhancement of warning signal detection with multimodal warning signals. The study involved developing from ground up a custom designed software/hardware platform that would permit the precise control of the timing between the audio and the visual signal. Three experiments were then conducted with this platform to evaluate issues of temporal synchrony and detection enhancement of co-modulated sinusoidally amplitude modulated audiovisual signals. The enhancements found with the use of audiovisual signals were small (1-3 dB of equivalent signal strength gain) but statistically significant. A theoretical and computation model was proposed to help better understand the underlying neural mechanism behind the enhancement. The model permitted us to explore the optimal settings of an audiovisual signal to maximize the benefit of the enhancement in detection.

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noise, situational awareness, sensory integration, multimodal signals
Report Number
DRDC-TORONTO-CR-2008-018 — Contractor Report
Date of publication
30 Jun 2008
Number of Pages
Electronic Document(PDF)

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