The Binaural Interaction Component of the Auditory Brainstem Response Under Precedence Effect Conditions

Dean, Kelly M.; Grose, John H.

doi:10.1177/2331216520946133

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…Binaural hearing is the ability of the human auditory system to integrate information received from both ears simultaneously [1]. With binaural hearing, people can perceive where a sound is coming from (sound localization) and choose to focus on one sound even when other background noises are present (sound segregation) [2,3]. Binaural hearing is essential for understanding speech in noisy backgrounds, commonly referred to as 'the cocktail party effect' [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Study of Correlation Between EEG Electrodes for the Analysis of Cortical Responses Related to Binaural Hearing

et al. 2021

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Binaural hearing is the ability of the human auditory system to integrate information received from both ears simultaneously. Binaural hearing is fundamental in understanding speech in noisy backgrounds. Any disfunction in one or both ears could cause a disruption in the processing mechanism. Auditory evoked potentials (AEPs) are electrical potentials evoked by externally presented auditory stimuli from any part of the auditory system. A non-invasive technology, electroencephalography (EEG) is used for the monitoring of AEPs. The research aims to identify the best suited electrode positions through correlation analysis and analyse the AEP signals from the selected electrodes in order to detect binaural sensitivity of the human brain. The study evaluates the time-averaged EEG responses of normal hearing subjects to auditory stimuli. The stimuli used for the study are 500 Hz Blackman windowed pure tones, presented in either homophasic (the same phase in both ears) or antiphasic (180-degree phase difference between the two ears) conditions. The study focuses on understanding the effect of phase reversal of auditory stimuli, an under interaural time difference (ITD) cue, on the middle latency response (MLR) region of the AEPs. A correlation analysis was carried out between the eight different locations and as a result, Cz and Pz electrode positions were selected as the best suited positions for further analysis. The selected electrode signals were further processed in the time domain and frequency domain analysis. In the time domain analysis, it was found that Cz electrode for eight subjects out of nine and Pz electrode for seven subjects out of nine, had the larger area under signal curve obtained in the antiphasic condition than in the homophasic signals. Frequency domain analysis showed that the frequency bands 20 to 25Hz and 25 to 30Hz had the most energy when elicited by antiphasic stimuli than by homophasic stimuli. The findings of this study can be further utilised for the detection of binaural processing in a human brain.

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Section: Introductionmentioning

confidence: 99%

Study of Correlation Between EEG Electrodes for the Analysis of Cortical Responses Related to Binaural Hearing

et al. 2021

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Spatial Release from Informational Masking Enhances the Early Cortical Representation of Speech Sounds

Zobel

Freyman

Sanders

2022

Auditory Perception & Cognition

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Individual differences in the ability to access spatial information in lag-clicks

Tirado

Gerdfeldter

Nilsson

2021

The Journal of the Acoustical Society of America

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It may be difficult to determine whether a dichotic lag-click points to the left or right when preceded by a diotic lead-click. Previous research suggests that this loss of spatial information is most prominent at inter-click intervals (ICIs) <10 ms. However, a study by Nilsson, Tirado, and Szychowska [(2019). J. Acoust. Soc. Am. 145, 512–524] found support for loss of spatial information in lag-clicks at much longer ICIs using a stimulus setup differing from those in previous research. The present study used a setup similar to that of the Nilsson, Tirado, and Szychowska study [(2019). J. Acoust. Soc. Am. 145, 512–524] to measure 13 listeners' ability to lateralize (left versus right) and detect (present versus absent) the lag-click in lead–lag click pairs with ICIs of 6–48 ms. The main finding was distinct individual differences in performance. Some listeners could lateralize lag-clicks all the way down to their detection threshold, whereas others had lateralization thresholds substantially higher than their detection thresholds, i.e., they could not lateralize lag-clicks that they could easily detect. Two such listeners trained for 30 days and managed to improve their lateralization thresholds to reach their detection thresholds, but only at longer ICIs (>20 ms), suggesting different mechanisms underlying lag-click lateralization at short versus long ICIs.

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The Binaural Interaction Component of the Auditory Brainstem Response Under Precedence Effect Conditions

Cited by 3 publications

References 18 publications

Study of Correlation Between EEG Electrodes for the Analysis of Cortical Responses Related to Binaural Hearing

Study of Correlation Between EEG Electrodes for the Analysis of Cortical Responses Related to Binaural Hearing

Spatial Release from Informational Masking Enhances the Early Cortical Representation of Speech Sounds

Individual differences in the ability to access spatial information in lag-clicks

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