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Related Experiment Video

Updated: Mar 29, 2026

Recording Brain Activity with Ear-Electroencephalography

Recording Brain Activity with Ear-Electroencephalography

Published on: March 31, 2023

EEG Recorded from the Ear: Characterizing the Ear-EEG Method.

Kaare B Mikkelsen¹, Simon L Kappel¹, Danilo P Mandic²

¹Department of Engineering, Aarhus University Aarhus, Denmark.

Frontiers in Neuroscience

|December 5, 2015

Summary

This summary is machine-generated.

Ear-EEG reliably records auditory responses, matching scalp EEG for signal strength and timing near the ear. This method is ideal for frequency-domain analyses in natural environments.

Keywords:

alpha band power auditory evoked potentials auditory steady-state response ear-EEG mobile EEG

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Area of Science:

Neuroscience
Biomedical Engineering
Signal Processing

Background:

A novel method, ear-electroencephalography (ear-EEG), allows electroencephalogram (EEG) measurement from the outer ear.
This technique offers potential for robust EEG recording in diverse, naturalistic settings.

Purpose of the Study:

To validate the ear-EEG method in a larger cohort across multiple experimental paradigms.
To compare ear-EEG recordings directly against simultaneous conventional scalp EEG.

Main Methods:

Simultaneous recording of 32 scalp electrodes and 12 ear electrodes.
Utilized auditory onset response, mismatch negativity, auditory steady-state response, and alpha power attenuation paradigms.
Investigated various ear electrode referencing strategies.

Main Results:

Ear-EEG demonstrated comparable signal-to-noise ratio to scalp EEG for sources near the ear.
Auditory steady-state responses and alpha-band modulation were reliably captured by ear-EEG.
Event-related potential component timing was preserved, though waveforms differed with specific referencing.

Conclusions:

Ear-EEG shows performance parity with conventional EEG for power spectrum analysis and ERP component timing.
The method reliably measures cortical activity near the ear, particularly beneficial for frequency-domain analyses.
Auditory mismatch responses were less reliably detected using ear-EEG.