Reverberation exacerbates effects of interruption on auditory spatial selective attention

Area of Science:

• Auditory perception
• Cognitive psychology
• Acoustics

Background:

• Everyday listening involves selective attention to target sounds amidst competing noise.
• Reverberation and unexpected distractions pose significant challenges to auditory scene analysis and speech comprehension.
• Understanding how acoustic environments impact attentional processes is crucial for explaining listening difficulties.

Purpose of the Study:

• To investigate whether reverberation exacerbates the disruptive effects of auditory distractions on speech recall.
• To determine if reverberation reduces the salience of distracting onsets or increases overall task difficulty.
• To examine the interaction between reverberation, distractions, and memory for auditory information.

Main Methods:

• Five online experiments were conducted using spatialized syllable streams.
• Participants performed recall tasks under pseudo-anechoic and reverberant acoustic conditions.
• Auditory streams were presented with and without intermittent distracting sounds (interrupters).

Main Results:

• Interrupters consistently impaired recall performance across all conditions.
• The detrimental effect of interrupters was most pronounced for syllables immediately following the distraction.
• This post-interruption recall deficit was significantly larger in reverberant conditions compared to anechoic conditions.

Conclusions:

• Distractions pose a greater challenge to auditory recall in reverberant environments.
• Reverberation appears to compound the disruptive effects of distractions, rather than merely reducing the salience of new onsets.
• These findings underscore the heightened difficulty of selective listening and memory encoding in acoustically complex, reverberant settings.