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Tack för länken! Jag hittade det här:
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The basilar membrane has a peculiar structure. It's made of 20,000 to 30,000 reed-like fibers that extend across the width of the cochlea. Near the oval window, the fibers are short and stiff. As you move toward the other end of the tubes, the fibers get longer and more limber.
This gives the fibers different resonant frequencies. A specific wave frequency will resonate perfectly with the fibers at a certain point, causing them to vibrate rapidly. This is the same principle that makes tuning forks and kazoos work -- a specific pitch will start a tuning fork ringing, and humming in a certain way will cause a kazoo reed to vibrate.
As the wave moves along most of the membrane, it can't release much energy -- the membrane is too tense. But when the wave reaches the fibers with the same resonant frequency, the wave's energy is suddenly released. Because of the increasing length and decreasing rigidity of the fibers, higher-frequency waves vibrate the fibers closer to the oval window, and lower frequency waves vibrate the fibers at the other end of the membrane. |
Jag tolkar det som att olika "fibrer" tar upp olika frekvenser Förstod jag rätt? Ju tjockare dem är desto lägre frekvenser uppfattar dem?
Last edited by Rikard on May-21-2004 at 02:09
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