Amplifying the Sounds That We Hear: How Does It Work?

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Amplifying the Sounds That We Hear: How Does It Work?
Most of the time, the changes in air pressure are relatively small. They do not apply a lot of force to your eardrum, but since it is extremely sensitive that minuscule amount of force will cause it to move at an increased distance. The cochlea within the inner ear works like a conductor to send the sound through the fluid, instead of sending it through the air.

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Amplifying the Sounds That We Hear: How Does It Work?

  1. 1. Amplifying the Sounds That We Hear: How Does It Work? Most of the time, the changes in air pressure are relatively small. They do not apply a lot of force to your eardrum, but since it is extremely sensitive that minuscule amount of force will cause it to move at an increased distance. The cochlea within the inner ear works like a conductor to send the sound through the fluid, instead of sending itthrough the air. This specific fluid has a larger amount of inertia than that inair, which makes it a lot harder to move.If you think of it in terms of how difficult it is to push through water versusbeing able to push through air, it will make much more sense. Since theamount of force that is felt at the drum is so small, it is not able to movethe fluid. Before any noise is passed onto the inside of the ear, the amountof pressure within the ear is going to need to be amplified.The whole process is the responsibility of the ossicles, which are a smallgrouping of bones within the middle ear. They are essentially the tiniestbones found within the human body. Ossicles are composed of:• Malleus - Hammer• Incus - Anvil• Stapes - Stirrup Visit our Website www.PremiumHearingSolutions.com
  2. 2. The malleus is attached to the middle of your eardrum, which is on theinside. Once the drum vibrates, it will move the malleus to and fro, similarto that of a lever. On the opposite end of the malleus is the incus, which inturn is connected into the stapes. At the opposite end of the stapes is thefaceplate that rests up to the cochlea alongside an oval window.Whenever there is air pressure that pushes into the eardrum, the resultingossicles will end up moving the faceplate, which pushes the stapes into thefluid within the cochlea. As the air pressure from the rarefaction pulls theeardrum out, the ossicles will move in a manner that pulls the stapes intothe cochlea fluid. As a result, the stapes are similar to that of a piston. Theywork to create waves within the fluid of the inner ear that help to representthe varying fluctuations within the air pressure of the sound waves.The ossicles work to amplify the forces from within the eardrum in one oftwo different ways. Mainly the amplification comes from the varyingdifference between the stirrup and the eardrum.Eardrums have a surface area of roughly 55 millimeters square, whereas,the stapes only have an area of around 3.2 millimeters square. Soundwaves work by applying force to every single inch of your eardrum, with theeardrum working to transfer all of the available energy into the stapes. Ifyou take this amount of energy and concentrate it into a smaller space, thepressure is going to become a lot more intense. Visit our Website www.PremiumHearingSolutions.com
  3. 3. The way in which the ossicles are configured controls how the sounds areamplified. Mallei are longer than the incus, which works to form a leverbetween the stapes and the eardrum. Even though the incus moves with anincreased amount of force, the malleus moves at a far greater distance.This whole process for amplifying sounds is extremely effective. Theamount of pressure that is applied to the fluid within the cochlea is roughly22 times as intense as the amount of pressure felt within the eardrum. It isenough pressure to pass the required level of sound into the inner ear,which is where it is then translated into something that the brain is able tounderstand thanks to the nerve impulses. Visit our Website www.PremiumHearingSolutions.com

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