Ear-EEG

Sleep Monitoring Using Ear-Centered Setups: Investigating the Influence From Electrode Configurations

Author(s): Mike Lind Rank, Preben Kidmose
Sleep Monitoring Using Ear-Centered Setups: Investigating the Influence From Electrode Configurations IEEE Transactions on Biomedical Engineering (TBME)
We combine ear-EEG sleep recordings with a state-of-the-art sleep scoring model, ‘seqsleepnet’, to investigate the upper limits of mobile sleep scoring. We manage to further improve on the state of the art in this field, and perform a detailed analysis of the influence of electrode positioning. From this, we find a general rule of thumb that as long a data set contain EOG information and electrode distance on the order of the width of the head, then good automatic sleep scoring is possible. We also find indications that the obtained automatic scoring may be more reliable than the manual scoring. read more

Chirp-Evoked Auditory Steady-State Response: The Effect of Repetition Rate

Author(s): Christian Bech Christensen, Thomas Lunner, James Michael Harte, Mike Lind Rank, Preben Kidmose
Chirp-Evoked Auditory Steady-State Response: The Effect of Repetition Rate 170 177 IEEE Transactions on Biomedical Engineering (TBME)
The auditory steady-state response (ASSR) is commonly used in clinical pediatric audiology to provide an electrophysiological estimate of hearing thresholds, and has the potential to be used in unsupervised mobile EEG applications. Enhancement of the ASSR amplitude through optimization of the stimulation and recording methods shortens the required testing time or reduce the offset between the electrophysiological and behavioral thresholds. In this study, the spatial distribution of the ASSR to broadband chirp stimuli is investigated across a wide range of repetition rates on the scalp and in the ears. Moreover, the ASSR amplitude is compared for commonly used electrode configurations. read more
Ear-EEG-Based Objective Hearing Threshold Estimation Evaluated on Normal Hearing Subjects

Ear-EEG-Based Objective Hearing Threshold Estimation Evaluated on Normal Hearing Subjects

Author(s): Christian Bech Christensen, James Michael Harte, Thomas Lunner, Preben Kidmose
Ear-EEG-Based Objective Hearing Threshold Estimation Evaluated on Normal Hearing Subjects 170 177 IEEE Transactions on Biomedical Engineering (TBME)

Integration of auditory evoked potential techniques in hearing aids potentially enable assessment of the users hearing on a regular basis. Hearing threshold levels can be estimated in the clinic using…

read more