Explain the structure and working principle of the peripheral auditory system in detail

To really understandHearing aid(hearing aid) What we can and cannot do, we have to understand our peripheral auditory system(peripheral auditory system)The structure and working principle.Simply put, this system is to help us identify two important parameters in sound: intensity and frequency.underHearing Aids Made in ChinaWill introduce you in detail:

reference picture1

The peripheral auditory system of the human body (reference picture1) Structurally divided into outer ear(external ear)Middle ear (middleear),inner ear (inner ear), The three parts perform their duties.

Outer ear

Outer ear including pinna (surface) And external auditory canal (ear canal).The shape of the auricle helps to collect sound. Sometimes people put their palms on their ears to form a semi-circular spherical surface to help the sound collection during a conversation. This actually creates an enhanced auricle.The external auditory meatus is like a tube, capable of conducting sound waves.Between the outer ear and the middle ear is the tympanic membrane(tympanic membrane), Respond to the sound wave signal from the external auditory canal, and transmit the signal to the middle ear.

Middle ear

The middle ear is an air-filled tympanum, and the nasopharynx(nasopharynx) Through the eustachian tube(eustachian tube) Connected.The middle ear is mainly composed of three ossicles to form the ossicular chain(ossicular chain), Can transmit sound to the inner ear full of lymph fluid; there are also some muscles, which can slightly protect the inner ear.The main function of the middle ear is to match the acoustic impedance of the outer ear and the inner ear(impedance match) And amplify the intensity of the sound through the principle of leverage.

inner ear

The inner ear is structurally divided into three semicircular canals(semicircular channels) And the cochlea(cochlea), The two are interlinked.The former is an organ that maintains the body’s balance, and the latter is an organ that converts acoustic signals into electrical signals.The cochlea is equivalent to an exquisite frequency analyzer, which gradually resolves high-frequency to low-frequency signals from the bottom to the top in space; the acoustic-electric conversion is through the hair cells in the cochlea(hair cells) Achieved.


After reading the above article, do you have a better understanding of the structure of the ear?Hearing Aids Made in ChinaWarm reminder: Protect your ears and start from the subtleties of life.

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