⚡Delta wave(Below 4 Hz) is seen in more sleep and more obscurity. ⚡Theta wave(4_8 Hz) plays an important role in creativity and intuitive understanding, inner focus and memory. ⚡The alpha wave(9_13 Hz) is seen in conditions of consciousness, inner peace, mental readiness, deep thinking, and closed eyes. ⚡The beta wave(14_30 Hz) has a huge impact on the process of attention and concentration, memory, thinking, maintaining attention and problem solving.