A novel online BCI system using speech imagery and ear-EEG for home appliances control

Kaongoen, Netiwit; Choi, Jin Seek; Jo, Sungho

doi:10.1016/j.cmpb.2022.107022

Cited by 10 publications

(11 citation statements)

References 26 publications

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“…The device operates wirelessly through a BLE connection with a personal computer. This device is an extended version of the one presented in our previous study [32], which was validated for its efficiency in a different BCI paradigm. Importantly, our device was developed at a production cost of less than 1500 USD, making it more cost-effective than some of the other commercial options available.…”

Section: Methodsmentioning

confidence: 99%

Decoding auditory-evoked response in affective states using wearable around-ear EEG system

Choi,

Kaongoen,

Choi

et al. 2023

Biomed. Phys. Eng. Express

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Objective In this paper, an around-ear EEG system is investigated as an alternative methodology to conventional scalp-EEG-based systems in classifying human affective states in the arousal-valence domain evoked in response to auditory stimuli.Approach EEG recorded from around the ears is compared to EEG collected according to the international 10-20 system in terms of efficacy in an affective state classification task. A wearable device with eight dry EEG channels is designed for ear-EEG acquisition in this study. Twenty-one subjects participated in an experiment consisting of six sessions over three days using both ear and scalp-EEG acquisition methods. Experimental tasks consisted of listening to an auditory stimulus and self-reporting the elicited emotion in response to the said stimulus. Various features were used in tandem with asymmetry methods to evaluate binary classification performances of arousal and valence states using ear-EEG signals in comparison to scalp-EEG. Main Results We achieve an average accuracy of 67.09% ±6.14 for arousal and 66.61%±6.14 for valence after training a multi-layer extreme learning machine with ear-EEG signals in a subject-dependent context, and 63.74% ±3.84 for arousal and 64.32% ±6.38 for valence in a subject-independent context. The best results show no significant differences between ear-EEG and scalp-EEG signals for classifications of affective states.Significance To the best of our knowledge, this paper is the first work to explore the use of around-ear EEG signals in emotion monitoring. Our results demonstrate the potential use of around-ear EEG systems for the development of emotional monitoring setups that are more suitable for use in daily affective life log systems compared to conventional scalp-EEG setups.

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Section: Methodsmentioning

confidence: 99%

Decoding auditory-evoked response in affective states using wearable around-ear EEG system

Choi,

Kaongoen,

Choi

et al. 2023

Biomed. Phys. Eng. Express

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“…Moreover, the headphone cups can serve as hosts for processing modules, rendering them complete wearable around-ear EEG systems in their own right. For instance, Kaongoen et al [65] presented an affordable custom-made around-ear EEG headphone produced using 3D printing technology. In this design, all electrodes are integrated into the ear cushions, while the processing module and battery are situated within the headphone cups.…”

Section: Headphonementioning

confidence: 99%

“…Certain devices, such as trEEGrid, have incorporated pre-gelled electrodes to enhance user convenience during self-application. In the case of aroundear EEG headphones mentioned in [65], as well as headbands described in [69,70], single-use foamtype solid-gel snap electrodes have been adopted. These electrodes feature embedded snap sockets within the device, offering a streamlined equipment preparation process.…”

Section: Around-ear Eeg Electrode 3221 Electrode Typesmentioning

confidence: 99%

“…Introducing a fusion of the ear-EEG approach with a wearable EEG processing module could significantly enhance the system's wearability and mobility, potentially making it viable for everyday use. Many studies leverage commercial-grade wearable EEG equipment such as SMARTING mobile amplifier (www.mbraintrain.com) that is used in most around-ear EEG studies involving cEEGrid, OpenBCI biosensing board (www.openbci.com) [20,26,29,44,52,65,69], WANDmini [33], or NeuroSky Mindwave headset (www.neurosky.com) [71,72] for their signal processing. However, these studies merely attach the equipment to the subject's attire or place it on a table during experiments, without incorporating any substantial design efforts to create a seamlessly wearable and stylish system.…”

Section: Signal Processing Hardware Used In Ear-eeg Studiesmentioning

confidence: 99%

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The future of wearable EEG: a review of ear-EEG technology and its applications

Kaongoen,

Choi,

Woo Choi

et al. 2023

J. Neural Eng.

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Objective:This review paper provides a comprehensive overview of ear-EEG technology, which involves recording electroencephalogram (EEG) signals from electrodes placed in or around the ear, and its applications in the field of neural engineering.Approach:We conducted a thorough literature search using multiple databases to identify relevant studies related to ear-EEG technology and its various applications. We selected 123 publications and synthesized the information to highlight the main findings and trends in this field.Main Results:Our review highlights the potential of ear-EEG technology as the future of wearable EEG technology. We discuss the advantages and limitations of ear-EEG compared to traditional scalp-based EEG and methods to overcome those limitations. Through our review, we found that ear-EEG is a promising method that produces comparable results to conventional scalp-based methods. We review the development of ear-EEG sensing devices, including the design, types of sensors, and materials. We also review the current state of research on ear-EEG in different application areas such as brain-computer interfaces, and clinical monitoring.Significance:This review paper is the first to focus solely on reviewing ear-EEG research articles. As such, it serves as a valuable resource for researchers, clinicians, and engineers working in the field of neural engineering. Our review sheds light on the exciting future prospects of ear-EEG, and its potential to advance neural engineering research and become the future of wearable EEG technology.

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“…Such systems typically work with 2 or 3 electrodes on each side, attached via glue or tape − to the area behind the ear. Other devices have electrodes housed in a 3D-printed package, such as earpieces , and headphones . There is little information about the type of electrodes, as most of the studies are aimed at proof-of-concept for the feasibility of using around-ear-EEG compared to scalp EEG.…”

Section: Around-ear Eegmentioning

confidence: 99%

Advances in Electrode Materials for Scalp, Forehead, and Ear EEG: A Mini-Review

Petrossian

Kateb

Miquet-Westphal

et al. 2023

ACS Appl. Bio Mater.

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Electroencephalogram (EEG) records the electrical activity of neurons in the cerebral cortex and is used extensively to diagnose, treat, and monitor psychiatric and neurological conditions. Reliable contact between the skin and the electrodes is essential for achieving consistency and for obtaining electroencephalographic information. There has been an increasing demand for effective equipment and electrodes to overcome the time-consuming and cumbersome application of traditional systems. Recently, ear-centered EEG has met with growing interest since it can provide good signal quality due to the proximity of the ear to the brain. In addition, it can facilitate mobile and unobtrusive usage due to its smaller size and ease of use, since it can be used without interfering with the patient’s daily activities. The purpose of this mini-review is to first introduce the broad range of electrodes used in conventional (scalp) EEG and subsequently discuss the state-of-the-art literature about around- and in-the-ear EEG.

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A novel online BCI system using speech imagery and ear-EEG for home appliances control

Cited by 10 publications

References 26 publications

Decoding auditory-evoked response in affective states using wearable around-ear EEG system

Decoding auditory-evoked response in affective states using wearable around-ear EEG system

The future of wearable EEG: a review of ear-EEG technology and its applications

Advances in Electrode Materials for Scalp, Forehead, and Ear EEG: A Mini-Review

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