Bouncing back: Transient, but not long-lasting, effects of background disturbances on speech processing

Area of Science:

• Auditory Neuroscience
• Cognitive Psychology
• Human-Computer Interaction

Background:

• Speech-in-noise processing is challenging, often impairing comprehension.
• The temporal dynamics of distraction from auditory disruptions remain poorly understood.

Purpose of the Study:

• To investigate if speech processing deficits persist after auditory disruptions cease.
• To examine the time-course of neural and physiological responses to transient speech-in-noise interference.

Main Methods:

• Utilized an ecologically relevant design with participants watching a video lecture.
• Measured neural activity (auditory ERP, alpha power) and skin conductance during occasional speech disruptions.
• Analyzed neural tracking of target speech and inter-subject correlation (ISC).

Main Results:

• Speech disruptions triggered immediate orienting responses (auditory ERP, skin conductance).
• Transient reductions in neural tracking and alpha power, with increased ISC, occurred during disruptions.
• All neural measures returned to baseline post-disruption, indicating no prolonged cognitive costs.

Conclusions:

• Auditory attention demonstrates resilience, maintaining robust speech representations despite transient disturbances.
• No evidence of lasting comprehension impairment or correlation with attention-deficit symptoms was found.
• Cognitive processing resources effectively recover post-disruption.