Imagined speech classification exploiting EEG power spectrum features.
Med Biol Eng Comput
; 62(8): 2529-2544, 2024 Aug.
Article
en En
| MEDLINE
| ID: mdl-38632207
ABSTRACT
Imagined speech recognition has developed as a significant topic of research in the field of brain-computer interfaces. This innovative technique has great promise as a communication tool, providing essential help to those with impairments. An imagined speech recognition model is proposed in this paper to identify the ten most frequently used English alphabets (e.g., A, D, E, H, I, N, O, R, S, T) and numerals (e.g., 0 to 9). A novel electroencephalogram (EEG) dataset was created by measuring the brain activity of 30 people while they imagined these alphabets and digits. As part of signal preprocessing, EEG signals are filtered before extracting delta, theta, alpha, and beta band power features. These features are used as input for classification using support vector machines, k-nearest neighbors, and random forest (RF) classifiers. It is identified that the RF classifier outperformed the others in terms of classification accuracy. Classification accuracies of 99.38% and 95.39% were achieved at the coarse-level and fine-level, respectively with the RF classifier. From our study, it is also revealed that the beta frequency band and the frontal lobe of the brain played crucial roles in imagined speech recognition. Furthermore, a comparative analysis against state-of-the-art techniques is conducted to demonstrate the efficacy of our proposed model.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Habla
/
Electroencefalografía
/
Máquina de Vectores de Soporte
Límite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Med Biol Eng Comput
Año:
2024
Tipo del documento:
Article
País de afiliación:
Bangladesh
Pais de publicación:
Estados Unidos