Bone conduction is a mode of sound conduction, which converts sound into mechanical vibration of different frequencies and transmits sound waves through human skull, bone labyrinth, inner ear lymphatic transmission, spiral apparatus, auditory nerve and auditory center.
Bone-conducting headphones are also called Bluetooth Headphones Wireless, Wireless Headphone, Bluetooth Headphone, Headband Headphones, Sport Earphone...
Compared with the classical mode of sound conduction that generates sound waves through the diaphragm, bone conduction eliminates many steps of sound wave transmission, and can achieve clear sound reduction in a noisy environment. Moreover, sound waves will not affect others due to their diffusion in the air. Bone conduction technology includes bone conduction speaker technology and bone conduction microphone technology:
(1) bone conduction loudspeaker technology is used to receive speech, which is to hear the sound. The pneumatic speaker converts electrical signals into acoustic (vibration) signals to the auditory nerve. The bone-conducting loudspeaker, on the other hand, converts electrical signals into sound waves (vibration signals) that travel directly through the bone to the auditory nerve. Sound waves (vibration signals) are transmitted in different media.
(2) bone conduction microphone technology is used to send voice, which collects sound. Air conduction is the transmission of sound waves through the air to the microphone, while bone conduction is the direct transmission through the bone. 
Earphones made using these bone conduction technologies are called bone conduction earphones, also known as bone conduction earphones, bone sensing earphones, bone transmission earphones and bone sensing earphones.
