Många hör vad de ser med ljudförstörandeeffekt på samtidigt mätbart ljud.
20 % hör ljud, som inte är mätbara i fysikalisk mening, när de ser vissa ljusstimuli. Beroende på kontexten kan effekten vara negativ på ljudperceptionen eller positiv i andra sammanhang.
Abstract
A deafening flash! Visual interference of auditory signal detection
In some people, visual stimulation evokes auditory sensations. How prevalent and how perceptually real is this? 22% of our neurotypical adult participants responded ‘Yes’ when asked whether they heard faint sounds accompanying flash stimuli, and showed significantly better ability to discriminate visual ‘Morse-code’ sequences. This benefit might arise from an ability to recode visual signals as sounds, thus taking advantage of superior temporal acuity of audition. In support of this, those who showed better visual relative to auditory sequence discrimination also had poorer auditory detection in the presence of uninformative visual flashes, though this was independent of awareness of visually-evoked sounds. Thus a visually-evoked auditory representation may occur subliminally and disrupt detection of real auditory signals. The frequent natural correlation between visual and auditory stimuli might explain the surprising prevalence of this phenomenon. Overall, our results suggest that learned correspondences between strongly correlated modalities may provide a precursor for some synaesthetic abilities.
“A deafening flash! Visual interference of auditory signal detection” by Christopher Fassnidge, Claudia Cecconi Marcotti, and Elliot Freeman in Consciousness and Cognition. Published online January 13 2017 doi:10.1016/j.concog.2016.12.009
Optimal ljudperception förutsätter i vissa lägen inte för mycket ljus.
JM
