What makes up outer ear

Three small bones that are connected and transmit the sound waves to the inner ear. The bones are called:. Eustachian tube. A canal that links the middle ear with the back of the nose. The eustachian tube helps to equalize the pressure in the middle ear.

Equalized pressure is needed for the proper transfer of sound waves. The eustachian tube is lined with mucous, just like the inside of the nose and throat. This contains the nerves for hearing. One end of the malleus is attached to the tympanic membrane and the other end is attached to the incus.

The incus is attached to the stapes. The base of the stapes is located in a depression called the oval window [6]. The oval window membrane is one of two membranes that separate the middle ear space from the inner ear. The other is the round window membrane. In its normal state, the Eustachian tube stays closed, but it will open when you yawn, swallow, chew, or hold your nose and blow. The purpose of the Eustachian tube is to provide fresh air to the middle ear space and to equalize pressure between the outer ear and the middle ear.

That sound is your Eustachian tube s opening and closing to equalize the air pressure in your ears. A tiny organ organ of Corti sits on top of the basilar membrane.

This organ contains hair cells, which convert the mechanical energy from the vibrations of the basilar membrane into electrical impulses. Those electrical impulses are sent to the auditory nerve [12] , which transmits the information up the brainstem to the auditory cortex. The pinna catches sound waves and channels them down the external auditory canal, where they hit the tympanic membrane and make it vibrate. Those vibrations cause the three ossicles to move. A canal that links the middle ear with the back of the nose.

The eustachian tube helps to equalize the pressure in the middle ear. Equalized pressure is needed for the proper transfer of sound waves. The eustachian tube is lined with mucous, just like the inside of the nose and throat. Hearing starts with the outer ear. When a sound is made outside the outer ear, the sound waves, or vibrations, travel down the external auditory canal and strike the eardrum tympanic membrane.

The eardrum vibrates.