Recent scientific studies suggest that children with developmental dyslexia have difficulties separating relevant auditory information from competing noise.
The ability to sharpen representation of repeating elements is crucial to speech perception in noise, since it allows superior "tagging" of voice pitch, an important cue for segregating sound streams in background noise. The disruption of this mechanism contributes to a critical deficit in noise-exclusion, a hallmark symptom in developmental dyslexia according to the researchers in Northwest University as reported in Neuron magazine