Comparison Experiment Study on the Auditory EEG Evoked with Bone Conduction and Air Conduction

The human hearing system can perceive sound through two ways of bone conduction and air conduction. In the bone conduction way, the sound of the voice through the skull vibration directly stimulate the auditory nerve, with anti interference, frequency band wider, without the affection of the middle ear diseases. In this study, the auditory EEG evoked experiments were designed with air conduction and bone conduction way, and compared the results between the two methods from three aspects, waveform analysis, brain electrical activity mapping and brain network analysis. The experimental results show that the two methods can evoke P300 and N200 waveform, and the amplitude of the bone conduction method is significantly higher than that of the air conduction method. There are also significant differences between the two methods of brain network.