Cortical processing of location and frequency changes of sounds in normal hearing listeners

Zhang, Fawen; McGuire, Kelli; Firestone, Gabrielle; Dalrymple, Kristen; Greinwald, John H.; Fu, Qiuyun

doi:10.1016/j.heares.2020.108110

Cited by 7 publications

(7 citation statements)

References 61 publications

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“…The ACC can be triggered by changes in frequency, intensity, vowels, and other characteristics of sound, and reflects the sensitivity of the auditory cortex. This study demonstrated that the ACC could also be evoked by a horizontal sound location change, a result consistent with that of Zhang et al (2021) .…”

Section: Discussionsupporting

confidence: 85%

“…However, the relationship between ACC and MAA in terms of sound location change has not been discussed before. Auditory discrimination and change detection should share a similar cortical processing mechanism ( Zhang et al, 2021 ), suggesting some similar characteristics, and also a possible link between ACC and behavioral measurement regarding sound location change.…”

Section: Discussionmentioning

confidence: 99%

“…Theoretically, the location change of an auditory stimulus can also evoke ACC but whether a sound location change elicits an ACC requires investigation. While this study was in progress, Zhang et al (2021) reported that an ACC response was evoked by a change in the stimulus location, which encouraged further exploration of the clinical setting and applications of ACC in sound localization. It remained unclear whether and how ACC amplitude and latency changed as the sound location changed, or the relationship between objective location change induced ACC and subjective sound localization behavioral measurements.…”

Section: Introductionmentioning

confidence: 92%

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Acoustic Change Complex Evoked by Horizontal Sound Location Change in Young Adults With Normal Hearing

Fan

Zhao²,

Sharma³

et al. 2022

Front. Neurosci.

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Acoustic change complex (ACC) is a cortical auditory-evoked potential induced by a change of continuous sound stimulation. This study aimed to explore: (1) whether the change of horizontal sound location can elicit ACC; (2) the relationship between the change of sound location and the amplitude or latency of ACC; (3) the relationship between the behavioral measure of localization, minimum audible angle (MAA), and ACC. A total of 36 normal-hearing adults participated in this study. A 180° horizontal arc-shaped bracket with a 1.2 m radius was set in a sound field where participants sat at the center. MAA was measured in a two-alternative forced-choice setting. The objective electroencephalography recording of ACC was conducted with the location changed at four sets of positions, ±45°, ±15°, ±5°, and ±2°. The test stimulus was a 125–6,000 Hz broadband noise of 1 s at 60 ± 2 dB SPL with a 2 s interval. The N1′–P2′ amplitudes, N1′ latencies, and P2′ latencies of ACC under four positions were evaluated. The influence of electrode sites and the direction of sound position change on ACC waveform was analyzed with analysis of variance. Results suggested that (1) ACC can be elicited successfully by changing the horizontal sound location position. The elicitation rate of ACC increased with the increase of location change. (2) N1′–P2′ amplitude increased and N1′ and P2′ latencies decreased as the change of sound location increased. The effects of test angles on N1′–P2′ amplitude [F(1.91,238.1) = 97.172, p < 0.001], N1′ latency [F(1.78,221.90) = 96.96, p < 0.001], and P2′ latency [F(1.87,233.11) = 79.97, p < 0.001] showed a statistical significance. (3) The direction of sound location change had no significant effect on any of the ACC peak amplitudes or latencies. (4) Sound location discrimination threshold by the ACC test (97.0% elicitation rate at ±5°) was higher than MAA threshold (2.08 ± 0.5°). The current study results show that though the ACC thresholds are higher than the behavioral thresholds on MAA task, ACC can be used as an objective method to evaluate sound localization ability. This article discusses the implications of this research for clinical practice and evaluation of localization skills, especially for children.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

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Acoustic Change Complex Evoked by Horizontal Sound Location Change in Young Adults With Normal Hearing

Fan

Zhao²,

Sharma³

et al. 2022

Front. Neurosci.

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“…Accuracy was above 95% for all participants. Each panel in Figure 2 (29,30). In contrast, the third peak could reflect a P3 response indicating a higher-level of awareness and uncertainty in the environmental change (31)(32)(33).…”

Section: Resultsmentioning

confidence: 97%

“…Deflections near 125 ms, 250 ms, 550 ms, and around 1.4 s characterize the morphology in each panel at latencies. The two early deflections likely correspond to N1 and P2 activity in response to the change in location of the target stimulus (29, 30). In contrast, the third peak could reflect a P3 response indicating a higher-level of awareness and uncertainty in the environmental change (31–33).…”

Section: Resultsmentioning

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.

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Cortical potentials evoked by tone frequency changes can predict speech perception in noise

et al. 2022

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Cortical processing of location and frequency changes of sounds in normal hearing listeners

Cited by 7 publications

References 61 publications

Acoustic Change Complex Evoked by Horizontal Sound Location Change in Young Adults With Normal Hearing

Acoustic Change Complex Evoked by Horizontal Sound Location Change in Young Adults With Normal Hearing

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

Cortical potentials evoked by tone frequency changes can predict speech perception in noise

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