The aim of this research study is to detect emotional state by processing electroencephalography (EEG) signals and test effect of meditation music therapy to stabilize mental state. This study is useful to identify 12 subtle emotions angry (annoying, angry, nervous), calm (calm, peaceful, relaxed), happy (excited, happy, pleased), sad (sleepy, bored, sad). A total 120 emotion signals were collected by using Emotive 14 channel EEG headset. Emotions are elicited by using three types of stimulus thoughts, audio and video. The system is trained by using captured database of emotion signals which include 30 signals of each emotion class. A total of 24 features were extracted by performing Chirplet transform. Band power is ranked as the prominent feature. The multimodel approach of classifier is used to classify emotions. Classification accuracy is tested for K-nearest neighbor (KNN), convolutional neural network (CNN), recurrent neural network (RNN) and deep neural network (DNN) classifiers. The system is tested to detect emotions of intellectually disable people. Meditation music therapy is used to stable mental state. It is found that it changed emotions of both intellectually disabled and normal participants from the annoying state to the relaxed state. A 75% positive transformation of mental state is obtained in the participants by using music therapy. This research study presents a novel approach for detailed analysis of brain EEG signals for emotion detection and stabilize mental state.
Biological brain signals may be used to identify emotions in a variety of ways, with accuracy depended on the methods used for signal processing, feature extraction, feature selection, and classification. The major goal of the current work was to use an adaptive channel selection and classification strategy to improve the effectiveness of emotion detection utilizing brain signals. Using different features picked by feature fusion approaches, the accuracy of existing classification models' emotion detection is assessed. Statistical modeling is used to determine time-domain and frequency-domain properties. Multiclass classification accuracy is examined using Neural Networks (NNs), Lasso regression, k-Nearest Neighbors (KNN), Support Vector Machine (SVM), and Random Forest (RF). After performing hyperparameter tuning, a remarkable increase in accuracy is achieved using Lasso regression, while RF performed well for all the feature sets. 78.02% and 76.77% accuracy were achieved for a small and noisy 24 feature dataset by Lasso regression and RF respectively whereas 76.54% accuracy is achieved by Lasso regression with the backward elimination wrapper method.
In the area of brain-computer interface, Intelligent emotion detection based on Electroencephalography brain signals is of great significance. Currently, deep learning algorithms like DNN, CNN, and SVM have significantly improved detection and prediction accuracy in many fields. However, deep learning and SVM have certain limitations in perceiving global dependence. In the present scenario, most of the deep learning models rely on pre-processing, extracting features, and network topology but still are not sufficient to provide satisfactory accuracy for the small and noisy database. Overlapping in target classes and boundaries causes low performance of SVM no matter the dataset is highly dimensional with fewer samples. In this research study, the focus of the novel approach is on developing a classification strategy for working on more emotion types. A “Mean of Mean “algorithm is proposed to completely analyze mental state by considering all the features in the features set. Emotion is first classified into one of the quadrants from four quadrants of emotion by comparing with the referential mean and then depending on the intensity of arousal the emotion is further classified into 12 subtypes by using the MIN Max range. The proposed algorithm performed better compared to other algorithms and provide a wide range of emotion types. When compared to current research of multi-class emotion identification, the experimental findings demonstrated that the suggested technique is extremely competitive. The average accuracy rate was above 90%, and it provided a comprehensive assessment of the mental condition. On the emotional spectrum, a person's emotional state is assessed.
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