ABSTRACT
Electroencephalogram (EEG) is the result of the cerebral cortex activity, and is related to brain’s cognition and perception to the surroundings. Neuroelectricity has a high level of temporal resolution, which enabled it to be analyzed in terms of frequency, spectrum, high frequency spectrum and etc. EEG place particular emphasis on the information transmission and processing of time, which can reflect the subjects’ information-process condition while dealing with cognizing tasks. Utilizing the high level of temporal resolution, EEG can be real-time processed and transformed into instructions. Thereby touch-less control is realized. It is easy to acquire EEG with the present technology, but in contrast, it’s hard to analyze its exact physical and physiological meaning. In the process with certain algorithm, exact physical and physiological meaning is obtained as the degree of concentration and relaxation. These two indexes are subjectively controllable, which can be called induced brain electricity, which can be induced by
simple imagination. So it is feasible to realize the control of things subjectively controlling the brain to relax and concentrate-which is proved by the ideational games in the current market. In addition to realtime control, we can also build portable devices with Bluetooth and Wi-Fi technology. The devices can be used to monitor the individual’s mental and health index at real-time. Now Beijing university of Posts and Telecommunication project team has realized the functions of playing dierent music according to the mood of the subjects. Mainstream ways of playing music-direct control and voice control on computers or mobile phones or the most convenient Home button control designed by apple-has no exception of the dependence on manual control. Besides, it is not practical to play dierent music by monitoring an individual’s mood, so as to improve his/her condition. Besides, switching songs backward and forward according to concentration values provides great convenience to people with disabilities and those who need this function. The second function-playing music by examining a person’s mood in order to alleviate his/her anxiety or fatigue condition-enjoys high health value too.
