Noise and reverberation damage speech segregation through different neural mechanisms

Evidence

In line with human psychoacoustic data, we find reverberation significantly impairs segregation when vowels have an intonated pitch contour, but not when they are spoken on a monotone. In contrast, noise impairs segregation independent of intonation pattern. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5022

Categorization

• XREF: Builds on cocktail-party literature; connects to psychoacoustic work on periodicity pitch as segregation cue and to the differential effects of reverberation vs noise on intonation-dependent stream segregation. — connects to: Efferent inhibition combines with head-shadow ILDs to drive cocktail-party segregation; Reverberation disrupts periodicity-based speech segregation only when pitch is intonated; Reverberation degrades neural pitch coding far more for intonated than steady speech (+2 more)
• corroborated: 4 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 5022

Broader Connections

• Reverberation degrades neural pitch coding far more for intonated than steady speech #expands (0.80)
• Complex listening relies on higher-level signal segregation beyond energetic masking #expands (0.78)
• Reverberation and noise alter early brainstem speech coding differently than cortical coding #complicates (0.75)