By ellie erehart angie barco maggie rieger tj myers and kameron thomas
Download
1 / 16

Hearing - PowerPoint PPT Presentation


  • 143 Views
  • Uploaded on

By: Ellie Erehart, Angie Barco, Maggie Rieger, Tj Myers and Kameron Thomas . Hearing . What does hearing do?. Provides you with the ability to locate objects in space Tell us what we can’t see Audition : the act, sense, or power of hearing. Something that is heard.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Hearing ' - joy


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

What does hearing do
What does hearing do? Kameron Thomas

  • Provides you with the ability to locate objects in space

  • Tell us what we can’t see

  • Audition: the act, sense, or power of hearing. Something that is heard.

  • Transduction: transformation of one form of energy into another-especially the transformation of stimulus information into nerve signals by the sense organs.


The physics of sound
The Physics of Sound Kameron Thomas

  • On Earth the vibrational energy pushes molecules of the medium back and forth. The changes in pressure spread outward in the form of a sound wave

  • In space (no air/medium) = Quiet

  • Frequency and amplitude are the two physical properties of any sound wave that determine how it will be sensed by the brain


  • Frequency: Kameron Thomas Refers to the number of vibrations (or cycles) the wave completes in a given amount of time

  • Amplitude: A measure of the physical strength of the sound wave (pressure/energy)

  • Hertz: the SI unit of frequency, equal to one cycle per second.


Sensing sounds
Sensing Sounds Kameron Thomas

  • 1.) Airborne sound waves must be relayed to the inner ear

    • Vibrating waves of air enter the outer ear (Pinna) strike the ear drum (tympanic membrane)

    • Transmit the vibrations to the hammer, anvil, and stirrup and they pass the vibrations to the cochlea (inner ear)

    • Ossicles: the three smallest bones in the body. Located in the middle ear. They transmit sound from the air to the fluid-filled cochlea.

    • Semicircular Canals: Any of three tubular and looped structures of the inner ear, together functioning in maintenance of the sense of balance in the body.


  • 2.) The cochlea focuses the vibrations on the basilar membrane

    • Airborne waves become “seaborne” (cochlea is filled with fluid).

    • The stirrup vibrates (wave motion happens)

    • The fluid wave spreads through the cochlea, causing a sympathetic vibration the basilar membrane

    • Organ of Corti: a structure in the cochlea of a mammal, consisting of hair cells that serve as receptors for auditory stimuli.


  • Tectorial Membrane: membraneone of two acellular gels in the cochlea of the inner ear, the other being the basilar membrane.

    • It overlies the sensory inner hair cells and electrically-motile outer hair cells of the organ of Corti and during acoustic stimulation stimulates the inner hair cells through fluid coupling, and the outer hair cells via direct connection to their tallest stereocilia.




Pitch
Pitch brain

  • A sensory characteristic of sound produced by the frequency of the sound wave

  • High Frequencies=High Pitch

  • Humans can hear 20 cps (cycles per second) - 20000 cps. Other animals can hear higher/lower sounds


  • Place Theory: brainstates that our perception of sound depends on where each component frequency produces vibrations along the basilar membrane

  • Frequency Theory: states that there are pulses that travel up the auditory nerve, carrying the information about sound to the brain for processing, and that the rate of this pulse matched the frequency of whatever tone you are hearing exactly


Loudness
Loudness brain

  • Is determined by its physical strength (amplitude)

  • More intense sound waves=louder sounds

  • Loudness is a psychological sensation

  • Measured in decibels


Timbre
Timbre brain

  • Complex quality of a sound wave

  • Most natural sound waves are mixtures

  • Enables you to recognize a friends voice


Deafness
Deafness brain

  • 1.) Conduction: the ways in which sound waves are converted to nerve energy have been interrupted

    • Usually caused by trauma to the middle ear

  • 2.) Sensorineural: hearing loss that occurs from damage to the inner ear, the nerve that runs from the ear to the brain (auditory nerve), or the brain

  • 3.) Nerve: A problem with how the impulses from the oval window are sent to the brain

    • Caused by damage to the auditory nerve or higher auditory process

    • Most people who are born deaf have this type of deafness


  • Cochlear Implant brain: is a surgically implanted electronic device that provides a sense of sound to a person who is profoundly deaf or severely hard of hearing

  • Deaf Culture: describes the social beliefs, behaviors, art, literary traditions, history, values, and shared institutions of communities that are affected by deafness


Alikeness to visual
Alikeness to Visual brain

  • Different regions of the brain, when activated, produce different sensations


ad