Bone conduction apparatus

The utility model relates to a bone conduction device comprising a controlling device for receiving and processing sound signals, the controlling device is connected with a signal transmitter at the outside through transmission lines, the controlling device is composed of a signal receiver, an earphone and transmission lines, wherein a high frequency digital phase shifter, a frequency synthesizer and a modulation coding technology module are arranged in the inner of the signal transmitter, a microphone, a vibration device, an amplifier and an acoustics echo eliminator are arranged in the inner of the earphone. The frequency synthesizer is arranged in the inner of the high frequency digital phase shifter, mainly composed of a phase accumulation module and a wave storage module. The utility model effectively avoids damage on eardrum caused by air conduction modes, meanwhile solves the defect the user can not receive speech information of the circumference environment when using an air conduction receiving devic