Explanation Of The Place Rat Theory And The Presence Theory

When a person with normal hearing hears the sound travels along the ear then bounces against the ear drum. The eardrum, the bones inside, and the cochlea vibrate and move thousands of tiny hairs inside the ear. When these hairs move an electrical response occurs. This electrical response goes to the hearing nerve and then it is send to the brain.

Basically how sound travels through the ear is a process of many steps. The sound waves are gathered by the pinna and then funneled into the meatus. Those waves then begin to vibrate the tympanic membrane which in turn hits against the malleus. The ossicle bones then vibrate like a chain reaction. The footplate will hit the oval window which triggers the fluid in the cochlea to move. The movement sways across the different hair cells creating impulses that are sent to the brain through the eighth cranial nerve.

I also think about how humans and animals hear different frequencies. Someone my age in there 20 's would be able to hear the door bell ring, while someone in there 70 's may not hear it. This measures how over time our frequencies can. A dog on the other hand can hear very high-pitched

53.Cochlea: a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger neural impulses.

The physiology of hearing starts with a vibration that occurs in the air which sends an acoustic signal to the ear drum. The signal is transduced into a mechanical signal that transmits through the inner ear and the cochlear nerve. Finally, the signal is

28) The next step in the auditory process after the stirrup vibrates against the oval window is that

The middle ear consists of three bones, the malleus, incus, and stapes. The tensor teympany which is a muscle that attaches to the malleus bone, as well as the stapes which is a muscle which attaches to the stapes bone. These muscles help to keep the bone off of the membrane that they are on to stop damage from loud noise. And lastly there is a Eustachian tube which is the middle ear as well it helps with pressure.

The middle ear has three ossicles (tiny bones) the hammer, the anvil, and the stirrup that connect the middle ear to the inner ear. When sound enters your middle ear, it causes the ossicles to vibrate. These vibrations then move into the cochlea, which is filled with fluid. When the vibrations move the fluid that is in the cochlea, it stimulates tiny hair cells that respond to different frequencies of sound. After the tiny hair cells are stimulated, they direct the frequencies of sound into the auditory nerve, as nerve impulses. (ASHA 2013)

Hi Amy. I have just wanted to expand on your post. In the beginning of chapter 10, Sacks explores medical history. He argues that the course taken by sound vibrations, from their entry into the external ear canals, through the eardrums on either side to the small bones, the ossicles, of the center ear, to the snail-molded cochlea, was initially worked out in the seventeenth century. It was believed then that sounds were transmitted by the ear, becoming enhanced in the cochlea "as in a musical instrument." After a century, it was found that the tapered shape of the cochlear spiral was differentially tuned to the scope of discernable frequencies, responsive to low sounds at its wide base, high sounds at its narrow apex. At last, by 1700, it was

The snail like shape of the cochlear effectively boosts the strength of the vibrations caused by sound, especially for low pitches. When sound waves hit the ear drum, tiny bones in the ear transmit the vibrations to the fluid of the cochlea, where they travel along a tube that winds into a spiral. The tube’s properties gradually change along its length, so the waves grow and then die away, much as an ocean wave travelling towards the shore gets taller and narrower before breaking at the beach.

Sounds and speech are captured by a microphone and sent to the external speech processor. The processor then translates the sounds into electrical signals, which are then sent to the transmitting coil. These codes travel up a cable to the headpiece and are transmitted across the skin through radio waves to the implanted cochlea electrodes. The electrodes’ signals then stimulate the auditory nerve fibres to send information to the brain where it is interpreted as meaningful sound.

The bone-anchored hearing aid, or Baha, made by CochlearTM, is a bone conduction hearing aid. The Baha is usually fitted to those who cannot wear air conduction hearing aids. The Baha is typically fit to individuals with a conductive hearing loss, but can be fit to other hearing losses. Sound vibrations travel through the outer ear to the tympanic membrane, which moves the malleus, incus, and stables, also known as the ossicles. The footplate of the stapes moves against the oval window, which creates a wave in the fluid inside the cochlea. This results in a change in pressure of the basilar membrane, moving the hair cells, which send information through the auditory nerve to the brain. A conductive hearing loss is when sounds are not conducted

The ear is made up of three parts, the outer ear, the middle ear and the inner ear. The outer ear consists of the pinnae. Its function is to focus sound on the tympanic membrane. The middle ear is where the three ossicles are containes, the Malleus, Incus,

The ears are one of the most complex and interesting systems thats human body has and the sounds we hear are actually in many different parts deflected, absorbed, and also filtered by our different body parts. It's then collected by our pinnae (the external part of or ears), whose dimensions further affect the sound on its way into ear. There, vibrations are translated into signals, which are interpreted by your brain. In the 1930s, two scientists at Bell Labs, Harvey Fletcher and Wilden A. Munson researched this process and what they discovered has changed and affected how we as humans understand the hearing process.

inner portions. The outer ear, or pinna, is the structure that we call the ear.