What is bone conduction?

What is bone conduction?
Under normal circumstances, sound waves are conducted through the air, and the sound waves drive the tympanic membrane to vibrate through the air, and then enter the inner ear, where they are converted into nerve signals at the cochlea, which are transmitted to the auditory center of the brain through the auditory nerve of the brain, and we hear the sound. However, there are still some sounds that reach the inner ear directly through bone conduction and act directly on the cochlea, for example: the sound of your own speech you hear, the sound of chewing food as mentioned above, the sound of you scratching your head, and the sound of famous musicians The sound of music heard by Beethoven with his teeth on the other end of the baton on the piano after deafness…
The paths of bone conduction and air conduction are different, resulting in different characteristics of the two: the sound transmitted through the air is affected by the environment, and the energy will be greatly attenuated, so that the timbre will change greatly, and the sound will need to reach the human inner ear. Through the outer ear, eardrum and middle ear, this process also affects the energy and timbre of the sound.
Bone conduction is a sound conduction method and a very common physiological phenomenon. It converts sound into mechanical vibrations of different frequencies, and transmits sound waves through the human skull, bone labyrinth, inner ear lymph fluid, auger, and auditory center. For example, the sound of chewing food is transmitted to the inner ear through the jawbone.