Auditory spatial tuning to moving speech in quiet or background babble measured in cortex

Palandrani, Katherine N.; Ozmeral, Erol J.

doi:10.1121/2.0001009

Cited by 2 publications

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“…The authors would like to thank Abigail Biberdorf and the staff of the USF Auditory & Speech Sciences Laboratory for assistance with subject recruitment and data collection. A portion of these data were presented at the 177th Meeting of the Acoustical Society of America in Louisville, KY, and were published as proceedings of that meeting [57].…”

Section: Acknowledgmentsmentioning

confidence: 99%

Selective auditory attention modulates cortical responses to sound location change for speech in quiet and in babble

Ozmeral

Palandrani

2023

PLoS ONE

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Listeners use the spatial location or change in spatial location of coherent acoustic cues to aid in auditory object formation. From stimulus-evoked onset responses in normal-hearing listeners using electroencephalography (EEG), we have previously shown measurable tuning to stimuli changing location in quiet, revealing a potential window into the cortical representations of auditory scene analysis. These earlier studies used non-fluctuating, spectrally narrow stimuli, so it was still unknown whether previous observations would translate to speech stimuli, and whether responses would be preserved for stimuli in the presence of background maskers. To examine the effects that selective auditory attention and interferers have on object formation, we measured cortical responses to speech changing location 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 stream when it occurred at a new location, explicitly indicating ‘yes’ or ‘no’ to whether the stimulus occurred at a block-specific location either 30 degrees to the left or right of midline. In the aggregate, results show similar evoked responses to speech stimuli changing location in quiet compared to babble background. However, the effect of the two background environments diverges somewhat when considering the magnitude and direction of the location change and where the subject was attending. In quiet, attention to the right hemifield appeared to evoke a stronger response than attention to the left hemifield when speech shifted in the rightward direction. No such difference was found in babble conditions. Therefore, consistent with challenges associated with cocktail party listening, directed spatial attention could be compromised in the presence of stimulus noise and likely leads to poorer use of spatial cues in auditory streaming.

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Section: Acknowledgmentsmentioning

confidence: 99%

Selective auditory attention modulates cortical responses to sound location change for speech in quiet and in babble

Ozmeral

Palandrani

2023

PLoS ONE

View full text Add to dashboard Cite

show abstract

Section: Acknowledgmentsmentioning

confidence: 99%

Selective auditory attention modulates cortical responses to sound location change for speech in quiet and in babble

Ozmeral

Palandrani

2022

Preprint

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Listeners use the spatial location or change in spatial location of coherent acoustic cues to aid in auditory object formation. From stimulus-evoked onset responses in normal-hearing listeners using electroencephalography (EEG), we have previously shown measurable tuning to stimuli changing location in quiet, revealing a potential window into cortical object formation. These earlier studies used non-fluctuating, spectrally narrow stimuli, so it was still unknown whether previous observations would translate to speech stimuli and whether responses would be preserved for stimuli in the presence of background maskers. To examine the effects that selective auditory attention and interferers have on object formation, we measured cortical responses to speech changing location 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 stream when it occurred at a new location, explicitly indicating yes or no to whether the stimulus occurred at a block-specific location either 30 degrees to the left or right of midline. In the aggregate, results show similar evoked responses to speech stimuli changing location in quiet compared to babble background. However, the effect of the two background environments diverges when considering the magnitude and direction of the location change, in which there was a clear influence of change vector in quiet but not in babble. Therefore, consistent with challenges associated with cocktail party listening, directed spatial attention can be shunted in the presence of stimulus noise and likely leads to poorer use of spatial cues in auditory streaming.

show abstract

Auditory spatial tuning to moving speech in quiet or background babble measured in cortex

Cited by 2 publications

References 0 publications

Selective auditory attention modulates cortical responses to sound location change for speech in quiet and in babble

Selective auditory attention modulates cortical responses to sound location change for speech in quiet and in babble

Selective auditory attention modulates cortical responses to sound location change for speech in quiet and in babble

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