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Auditory Perception

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...

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Related Experiment Video

Updated: Sep 8, 2025

Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex

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EEG Responses to auditory figure-ground perception.

Xiaoxuan Guo¹, Pradeep Dheerendra², Ester Benzaquén¹

¹Biosciences institute, Newcastle University, United Kingdom.

Hearing Research

|June 12, 2022

Summary

This summary is machine-generated.

Electroencephalography (EEG) measures of auditory grouping show promise for assessing hearing difficulties. The stochastic figure-ground test offers a language-independent clinical tool for sound segregation in hearing-impaired individuals.

Keywords:

Auditory segregation Clinical Electroencephalography Hearing Test

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Performing Behavioral Tasks in Subjects with Intracranial Electrodes

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Published on: October 2, 2014

Area of Science:

Neuroscience
Auditory Neuroscience
Clinical Neurophysiology

Background:

Hearing impairment frequently causes difficulty understanding speech in noisy environments.
Generic behavioral measures of sound segregation and grouping correlate with speech-in-noise abilities but are language-independent.
Electroencephalography (EEG) offers a potential method for objectively measuring central auditory processing.

Purpose of the Study:

To evaluate electroencephalographic (EEG) measures for central auditory grouping and speech-in-noise perception.
To assess the efficacy of the stochastic figure-ground test and speech-in-babble test as clinical tools.
To investigate the influence of attentional states on auditory processing using EEG.

Main Methods:

EEG was recorded during auditory target presentation (figure or speech) within background noise (16 talker-babble or pure-tones).
Participants engaged in relevant tasks or visual-distractor tasks to manipulate attentional states.
EEG time-domain analysis was performed to examine evoked potentials.

Main Results:

EEG time-domain analysis revealed enhanced negative responses (150-350 ms) during auditory target detection.
Figure detection showed significantly enhanced responses under distracted conditions.
Single-channel EEG acquisition (vertex-to-mastoid) yielded results comparable to multi-channel arrays.

Conclusions:

The stochastic figure-ground test is a viable clinical measure for auditory grouping, relevant to real-world listening.
This EEG-based measure can assess auditory grouping irrespective of language.
The figure-ground test can be effectively used even without a specific task, offering a simplified clinical application.