Brain Signatures of Auditory Attention in Real-Life Listening Scenarios
* Präsentierender Autor
Zusammenfassung:Selective attention to relevant acoustic stimuli is critical for scene analysis and communication. In the laboratory, two oscillatory brain processes index auditory attention. First, slow neural oscillations (~4 Hz) reveal the brain’s tracking of relevant acoustic stimuli. Second, the power of alpha oscillations (~10 Hz) indexes attention deployment to overcome listening challenges. In recent years, we found that investigation of these brain processes in more real-life listening scenarios significantly advances auditory attention research. Portable Electroencephalography (EEG), recorded inside the ear canal, reveals which sound source a listener attends to and is thus relevant for development of future hearing aids. Furthermore, EEG recordings differentiate a listener’s attentional suppression of stationary versus moving distractor sounds in a 360° loudspeaker array. While previous spatial attention studies often used rather unrealistic dichotic listening setups with competing sounds on the left versus right ear, we have recently shown that hemispheric lateralization of alpha power differentially signifies auditory target selection versus distractor suppression in case one sound source is presented in the free field in front of the listener, while another sound source systematically varies between left and right. Our findings enrich the development of realistic scenarios, such as virtual reality (VR), to study auditory attention.