How does the human ear 👂 works

Biology

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Answer

Usikilizaji katika sikio la binadamu ni mchakato tata unaohusisha hatua kadhaa.

  1. Kupokea sauti: Mawimbi ya sauti huingia kwenye mfereji wa sikio (ear canal) na kusababisha utando wa sikio (eardrum) kutetemeka.
  2. Kuimarisha sauti: Mitetemo hii huhamishiwa kwenye mifupa midogo matatu katika sikio la kati (middle ear): malius (malleus), inkasi (incus), na stapes (stapes). Mifupa hii huimarisha na kuhamisha mitetemo hadi kwenye koklea (cochlea) katika sikio la ndani.
  3. Kubadilisha sauti kuwa ishara za neva: Ndani ya koklea, ambayo imejaa kimiminika, mitetemo husababisha nywele za hisi (hair cells) kusonga. Harakati hizi hubadilisha nishati ya mitetemo kuwa ishara za umeme.
  4. Kutuma ishara kwenye ubongo: Ishara za umeme husafiri kupitia neva ya kusikia (auditory nerve) hadi kwenye ubongo, ambapo hutafsiriwa kama sauti tunazosikia.
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