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Open Access item Effects of auditory noise on the psychophysical detection of visual signals: Cross-modal stochastic resonance

Authors:Manjarrez, Elías
Méndez, Ignacio
Martínez, Lourdes
Flores, Amira
Mirasso, Claudio R.
Keywords:Noise, Stochastic resonance, Psychophysics, Cross-modal, Multisensory
Issue Date:16-Jun-2007
Citation:Neuroscience Letters 415, 231-236 (2007)
Abstract:Harper (Percept Mot Skills, 1979; 48:791-8) demonstrated that the visual flicker sensitivity was an inverted U-like function of the intensity of different levels of auditory noise from 50 to 90 db (SPL), without concomitant changes in the response bias. The aim of the present study was to extend these observations in the context of the stochastic resonance, a counterintuitive phenomenon in which a particular level of noise enhances the response of a nonlinear system to a weak input signal. We show psychophysical evidence in a yes-no paradigm for the existence of a stochastic resonance-like phenomenon in the auditory-visual interactions. We show that the detection of a weak visual signal was an inverted U-like function of the intensity of different levels of auditory noise. Nevertheless, for a strong visual signal the auditory noise acts in detriment of the ability of visual detection. Our results suggest that auditory noise could be employed in vision rehabilitation interventions in order to improve the detection of weak visual signals.
Description:6 pages.-- Final full-text version of the paper available at: http://dx.doi.org/10.1016/j.neulet.2007.01.030.
Appears in Collections:(IFISC) Artículos

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