simulation of a cochlear model as a descriptive tool for normal and abnormal auditory functioning l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Simulation of a Cochlear Model as a Descriptive Tool for Normal and Abnormal Auditory Functioning PowerPoint Presentation
Download Presentation
Simulation of a Cochlear Model as a Descriptive Tool for Normal and Abnormal Auditory Functioning

Loading in 2 Seconds...

play fullscreen
1 / 28

Simulation of a Cochlear Model as a Descriptive Tool for Normal and Abnormal Auditory Functioning - PowerPoint PPT Presentation


  • 165 Views
  • Uploaded on

Simulation of a Cochlear Model as a Descriptive Tool for Normal and Abnormal Auditory Functioning. Miriam Furst-Yust Azaria Cohen, Vered Weisz, Noam Elbaum, Yaniv Halmut, Dan Mecrantz, Oren Bahat, and Udi shtalrid Dept. of Electrical Engineering-Systems Tel Aviv University.

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 'Simulation of a Cochlear Model as a Descriptive Tool for Normal and Abnormal Auditory Functioning' - ballari


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
simulation of a cochlear model as a descriptive tool for normal and abnormal auditory functioning

Simulation of a Cochlear Model as a Descriptive Tool for Normal and Abnormal Auditory Functioning

Miriam Furst-Yust

Azaria Cohen, Vered Weisz, Noam Elbaum, Yaniv Halmut, Dan Mecrantz, Oren Bahat, and Udi shtalrid

Dept. of Electrical Engineering-Systems

Tel Aviv University

clinical audiometric tests
Clinical Audiometric Tests
  • Audiograms
  • Speech Discrimination Tests
  • Otoacoustic Emissions
audiometric diagnosis
Audiometric Diagnosis
  • Conductive or Sensorineural Hearing Loss
  • Cochlear or Retrocochlear Hearing Loss
  • Inner Hair Cells or Outer Hair Cells Loss ?
  • The amount of Outer hair Cell Loss?
slide4

Can a Cochlear model help in

Audiometric Diagnosis ?

cochlear model
Cochlear Model
  • One dimensional model
  • Based on fluid dynamics
outer hair cell model
Outer Hair Cell Model
  • Electromotile model
  • OHC adds to basilar membrane pressure
middle ear model

Outer ear

Middle ear

TM

Incudostapedial joint

microphone

Middle Ear Model
  • Piston based model

Oval window

cochlear representations of tones
Cochlear Representationsof Tones

Cochlear representation

cochlear representation of a click

100us

Cochlear Representation of a click

Healthy Cochlea

OHC Loss

Stapes

Apex

Stimulus

representation of a word
Representation of a word

Input Signal: The word “SHEN”

INPUT

OUTPUT

Normal

Cochlea

OHC Loss

slide15

Cochlear Representation of a Noisy Word

Input Signal: The word “SHEN” with Noise

INPUT

OUTPUT

Normal

Cochlea

OHC Loss

model prediction excitation patterns
Model Prediction: Excitation Patterns

Normal Cochlea

Damaged Cochlea

No Active Outer Hair Cells

estimated audiograms
Estimated Audiograms

Normal OHC activity

Partial damaged OHC

No OHC activity

simulated audiograms
Simulated Audiograms

Normal OHC activity with “roughness”

Partial OHC activity with “roughness”

partial ohc loss
Partial OHC Loss
  • Measured Audiogram

Model Prediction

non linear respomse
Non Linear Respomse
  • טון בודד – פילטרים

D=2.3cm CF=488Hz

D=1.8cm CF=1074Hz

response to two tones combination tones
Response to Two Tones:Combination Tones

Healthy Cochlea

Time

Frequency

Input = 2kHz + 2.44kHz; Equal level