What is the principle of hearing aids – how hearing aids work
In daily life, many people have some misunderstandings about hearing aids. They feel that wearing a hearing aid can be like a good ear. In fact, this is a wrong understanding. Today, I will talk to you about the structure of the ear.
One outer ear
1. Auricle: It has the function of collecting sound.
2 ear canal: The external auditory canal is not a straight passage, but an “S” shape, composed of cartilage and bone.
Second middle ear
1. Tympanic membrane: is the boundary between the middle ear and the outer ear. It is oval in shape, slightly concave inward in the middle, grayish white, more transparent, and 30 degree angle with the ear canal. The tympanic membrane is 8MM wide, about 9MM high, and thick 0.1MM.
2. ossicular chain: The ossicle is the smallest bone in the human body. In the middle ear cavity, it is called the hammer bone, the anvil bone and the tibia.
Three inner ear
The inner ear is not like the bone chain, it can be shared separately. It is a series of pipes and cavities in the tibial rock. These tube passengers and cavities are filled with perilymph and lymphatic fluid. The inner lymph is separated by a membrane. The inner ear is divided into three parts: semicircular canal, vestibule and cochlea.
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