1 / 10

Middle Ear

Middle Ear. Acoustic energy. 99.9%. Net loss = 40-55 dB. P 1. P 2. A 1. A 2. Impedance Matching. TM >>> Oval window. Areal Ratio F=P 1 A 1 =P 2 A 2 therefore P 2 /P 1 =A 1 /A 2. P 1. P 2. A 1. A 2. L 1. L 2. Impedance Matching.

rusty
Download Presentation

Middle Ear

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Middle Ear

  2. Acoustic energy 99.9% Net loss = 40-55 dB

  3. P1 P2 A1 A2 Impedance Matching TM>>>Ovalwindow • Areal RatioF=P1A1=P2A2 therefore P2/P1=A1/A2

  4. P1 P2 A1 A2 L1 L2 Impedance Matching • Areal RatioF=P1A1=P2A2 therefore P2/P1=A1/A2 Malleus>Incus • Lever RatioL1/F1=F2/L2

  5. P1 P2 A1 A2 L1 L2 Impedance Matching • Areal RatioF=P1A1=P2A2 therefore P2/P1=A1/A2 • BucklingAction • Lever RatioL1/F1=F2/L2

  6. Acoustic Impedance Resonance frequencyaffects intensity during sound transmission

  7. Acoustic Impedance Also criticial in the cochlea STIFFNESS LimitsLow frequency LimitsHigh frequency MASS

  8. Transfer Functions Volume of middle ear space Mass of ossicles

  9. Transfer Functions

More Related