| Autor: |
Palandrani, Katherine Noel, Ozmeral, Erol James |
| Předmět: |
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| Zdroj: |
Proceedings of Meetings on Acoustics; 5/13/2019, Vol. 36 Issue 1, p1-6, 6p |
| Abstrakt: |
The ability to understand speech in complex backgrounds often relies on spatial factors that contribute to forming discernible auditory objects. From stimulus-evoked onset responses in normal hearing listeners using electroencephalography (EEG), we have shown measurable spatial tuning to moving noise bursts in quiet, revealing a potential window into cortical object formation. However, it is still unknown whether comparable effects are observed with speech stimuli, and whether and how much the presence of noise disrupts EEG responses to moving speech. To test whether the presence of noise has deleterious effects on object formation and potential selective auditory attention, we measured cortical responses to moving speech in the free field with and without background babble (+6 dB SNR) during both passive and active conditions. Active conditions required listeners to respond to the onset of the speech when it occurred at a new location, while indicating yes or no to whether the stimulus occurred at a block-specific location. Results clearly show evoked responses with speech stimuli comparable to those obtained with moving noise-bursts. Measurable spatial tuning and subsequent sharpening was evident in both speech-in-noise and speech-in-quiet conditions, showing that background noise did not have deleterious effects on observed responses. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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