Effect of white noise stimulation and visual working memory task on brain signal

Abstract

Researcher had claimed that white noise is one of the sound stimulation that is able to improve the human cognitive thinking. This study aims to determine the effect of white noise and visual working memory task on brain signal. The performance of the subject during the task has been analyzed based on the brain signal activation at location Fp1, Fz, F8, Pz, O1 and O2. In achieving the objective of this study, an experiment has been conducted that involving twenty six adult subjects. They are required to memorize the task within two minutes. Electroencephalography (EEG) machine (Neurofax 9200) with 10-20 placement electrodes was used to record the electrical activity of the brain. Two features which are mean and standard deviation has been extracted from the EEG signal by using stationary wavelet transform approach. T-test analysis has been done to determine the significant differences between the sound stimulation and control condition. The result shows that there is a significant difference between white noise and silence condition at certain brain locations. Findings from this study show that the location Fp1 and Fz is mostly affected by sound stimulation and visual working memory task.