Explain how a human ear works

An object produces sound when it vibrates in matter. This could be a solid, such as earth; a liquid, such as water; or a gas, such as air. Most of the time, we hear sounds traveling through the air in our atmosphere.

 

When something vibrates in the atmosphere, it moves the air particles around it. Those air particles in turn move the air particles around them, carrying the pulse of the vibration through the air.

To see how this works, let's look at a simple vibrating object: a bell. When you hit a bell, the metal vibrates -- flexes in and out. When it flexes out on one side, it pushes on the surrounding air particles on that side. These air particles then collide with the particles in front of them, which collide with the particles in front of them, and so on. This is called compression.

 

ear diagram

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You can see in the diagram that the external ear captures the traveling sound waves. The sound waves enter through the pinna into the ear canal. Through the ear canal the sound waves reach the eardrum. These sound waves cause vibrations of the eardrum that are passed on to the middle ear. The three tiny bones in the middle ear pass the vibrations over to the inner ear. The stapes deliver the sound waves to the cochlea through the round window of the outer part of the inner ear, called the bony labyrinth. These vibrations cause the perilymph fluid present in the cochlea to vibrate. These vibrations are picked up by the sensory hair cells, that translate it into nerve impulses and deliver it to the auditory nerve present at the base of cochlea. The VIII cranial nerve carries the messages to the brain, where it is read and translated into meaningful sounds. 

Diagram of The Ear

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You can see in the diagram that the external ear captures the traveling sound waves. The sound waves enter through the pinna into the ear canal. Through the ear canal the sound waves reach the eardrum. These sound waves cause vibrations of the eardrum that are passed on to the middle ear. The three tiny bones in the middle ear pass the vibrations over to the inner ear. The stapes deliver the sound waves to the cochlea through the round window of the outer part of the inner ear, called the bony labyrinth. These vibrations cause the perilymph fluid present in the cochlea to vibrate. These vibrations are picked up by the sensory hair cells, that translate it into nerve impulses and deliver it to the auditory nerve present at the base of cochlea. The VIII cranial nerve carries the messages to the brain, where it is read and translated into meaningful sounds.

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The outer ear is called pinna. It collects

the sound from the surroundings. The

collected sound passes through the auditory

canal. At the end of the auditory canal there

is a thin membrane called the ear drum or

tympanic membrane. When a compression

of the medium reaches the eardrum the

pressure on the outside of the membrane

increases and forces the eardrum inward.

Similarly, the eardrum moves outward when

a rarefaction reaches it. In this way the

eardrum vibrates. The vibrations are

amplified several times by three bones (the

hammer, anvil and stirrup) in the middle ear.

The middle ear transmits the amplified

pressure variations received from the sound

wave to the inner ear. In the inner ear, the

pressure variations are turned into electrical

signals by the cochlea. These electrical signals

are sent to the brain via the auditory nerve,

and the brain interprets them as sound.

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ui9uiuutyuutuiiriiyolkjui

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How do we hear?

The human ear has three anatomical parts:

  • Outer ear
  • Middle ear and
  • Inner ear.

Sounds travel through the air as sound waves. In normal hearing the external part of the ear helps to direct these sound waves down the ear canal (external auditory canal) to the ear drum. This causes the ear drum (tympanic membrane) to move and vibrate.There are three small bones, called the malleus, incus and stapes (commonly known as the hammer, anvil and stirrup) that are anchored to the ear drum. The vibration of the eardrum also causes these small bones to vibrate.The cochlear is the main organ involved with processing of sound.

It is lined with hairs and filled with fluid. Movement of the membrane (the oval window) of the cochlear by the stapes bone causes shifts in this fluid and movement of these hairs. It is this movement that results in sending signals to the hearing nerve. This then sends the noise information to the brain for interpretation.

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IN BRIEF WE CAN SAY THAT PINNA WHICH IS EXTERNAL EAR RECIVES THE SOUND AND IT TRAVELS THROUGH EAR CANNAL AND VIBRATES THE EAR DRUM OO TYMPANIC MEMBRANE AND THEN IT ENTERS THE MIDDLE EAR AND THROUGH MIDDLE EAR IT ENTER TO BRAIN VIA AUDITARY NERVES

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IN BRIEF I WOULD LIKE TO SAY:
Sound waves enter the ears and travel down a canal at the end of which is a thin, tightly stretched membrane called eardrum. As the sound waves strike the eardrum, it vibrates and the vibrations reach the inner ear which sends signals to the brain. The brain interprets the signals and we hear or recognise the sound.
HOPE THIS INFORMATION HELPS!!!
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First the sound wave enters the ear through the pinna, then it passes through the auditory canal. From here it reaches the eardrum which then vibrates and sends the signal to hammer which sends the signal to the anvil. From the anvil the sound vibrations reaches the smallest bone of the human body called as the stirrup. The stirrup has small hair like projections that absorbs the sound vibration and sends it to the cochlea which is a coiled part. From here the sound vibration reaches the auditory nerve which sends the receivedsignal to the brain.
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We hear the Vibrations Outside......


























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kadi Kitaaab Kholi hai Toh Dhooond lo





....hum vele nhi hai batane Ko
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It is given in page 69
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Sound waves are collected by the pinna and then are directed through ear canal sound waves on striking the eardrum make it vibrate exactly the same way as the given sound emitting object. The bones in thge middle ear start vibrating when eardrum vibrates. It helps in magnifying the vibrations. When the magnified vibrations reach the cochlea in the inner ear, the fluid in it starts vibrating. These vibrationsare picked up by sensory receptors and are converted into electrical signals. These electrical signals then travel to the brain which interprets sound.
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the ear use to eat and washing our body this is the use of ear
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The pinna collect the sound and goes to the ear drum and when it start vivrating there will be compress and rare fraction and it rereflet the sond and we can hear the sound
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