With the development of science and technology, there are more and more electromagnetic and noise factors in the working and living environment. These two factors often exist together, and their impact on people may interact. Scalp EEG is a classic nerve detection technology, which can reflect the functional state of the brain in a non-invasive and real-time manner. This project intends to use EEG technology to study the effects of electromagnetism and noise on human brain function.

Inclusion Criteria:

• Male, 18-30 years old, right-handed, with normal hearing and normal visual or corrected acuity;

Exclusion Criteria:

• Have history of smoking, alcohol abuse, no history of neurological or psychiatric disorders (e.g., epilepsy), no relevant family history, and no recent medication use;
• Have history of surgery for head injury, no metal implants in the body (including braces);
• Sleep-wake time irregular， with sleep disturbance;
• Have history of noise allergy;
• Participate in similar psychological experiments during 2 months.