Quote: Electrochemistry

corti-4

“In the human ear, sound is a mechanical movement of air molecules, bones, fluids and membranes. No such movement can stimulate brain cells to create the sensation of hearing. The brain responds not to vibrations but to electrical-chemical changes like those in a battery. There has to be a transducer, a device similar in purpose to a microphone, for converting mechanical energy into electrical energy. The microphone inside the human head is the microscopic organ of Corti. It is the essential link in the hearing. Outside it is only delicate machinery, inside only electrochemistry”.

Posted in academia on October 29th, 2009 by fresh good minimal | 13 Comments

13 Responses to ' Quote: Electrochemistry '

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  1. dj plan b said,

    on October 29th, 2009 at 01:22

    as putea sa-mi gravez cu laserul asta pe scariza.

  2. Strangelove said,

    on October 29th, 2009 at 04:56

    partea buna e ca in viitorul apropiat ne vom putea upgrada urechile. abia astept sa-mi largesc frecventa.

  3. de-dans said,

    on October 29th, 2009 at 05:08

    uh, pai iti dai seama cate tampenii ai auzi? de primii o sa fie cel mai prost ca lumea asta e gandita pentru astia care auzim “in banda scurta”, ce nu auzim nu ne intereseaza si banuiesc ca e haos. sau ti le pui numai la concertele HD (sau ED as in extended definition) si in medii controlate? “saracii, cyborgii astia, aude numai prostii”

  4. on October 29th, 2009 at 05:10

    mie nu-mi place deloc apa in urechi acum – sa vezi atunci.

  5. de-dans said,

    on October 29th, 2009 at 05:26

    si pentru lectia de anatomie:

    “Sound pressure is amplified through the middle portion of the ear and passed from the medium of air into a liquid medium.
    The inner ear is hollow. The hollow channels of the inner ear are filled with liquid, and contain a sensory epithelium that is studded with hair cells. The microscopic “hairs” of these cells are structural protein filaments that project out into the fluid. The hair cells are mechanoreceptors that release a chemical neurotransmitter when stimulated. Sound waves moving through fluid push the filaments; if the filaments bend over enough it causes the hair cells to fire. In this way sound waves are transformed into nerve impulses.” wiki

  6. on October 29th, 2009 at 05:35

    stai un pic profesore. ma refeream la cum se aude apa in urechi.

  7. on October 29th, 2009 at 05:41

    @Strangelove:

    ar fi foarte bine sa ne marim banda. e un lucru pe care trebuie sa-l iei in calcul pentru asta. perceptia subiectiva a sunetului.

    tu esti obisnuit sa auzi intre 20-20.000 Hz. ca sa auzi intre (aproape)0Hz si frecventa luminii constant, e cazul sa te adaptezi un pic. that takes time or some really special medication.

    p.s. ar fi placut sa auzi lumina totusi – raster noton 2.0

  8. on October 29th, 2009 at 05:55

    fun fact:

    “In Europe, Africa, Australia, Southern South America, most of Asia, and Russia, the frequency of the alternating current in household electrical outlets is 50 Hz (close to the tone G), whereas in North America and Northern South America, the frequency of the alternating current is 60 Hz (between the tones B sharp and B — that is, a minor third above the European frequency). The frequency of the ‘hum’ in an audio recording can show where the recording was made — in countries utilizing the European, or the American grid frequency”

  9. de-dans said,

    on October 29th, 2009 at 06:26

    @heathen: nu era pentru tine, era numai cu lichid :), am postat in acelasi timp. reluam din wiki ce zice quote-ul.

  10. Strangelove said,

    on October 29th, 2009 at 10:37

    clar va fi foarte mult zgomot (sau cine stie?), probabil ca vom folosi feature-ul asta cu un switch de on-off.
    dar daca vom putea upgrada si creierele atunci vom putea gestiona mai mult input sonor, astfel ca intr-un scurt timp ar deveni un feature indispensabil. sa te lipsesti de el ar fi ca si cum te-ai lipsi de spectrul de culoare dintre albastru si rosu. :)

    SF, SF, dar intr-o buna zi…

  11. de-dans said,

    on October 30th, 2009 at 12:23

    vezi romanu’ cum e.. ii dai o ureche mai evoluata si imediat se gandeste cum sa-si upgradeze creierul :)

  12. on October 30th, 2009 at 06:41

    dai o ureche si iti ia tot creierul

  13. autsaid3r said,

    on November 23rd, 2009 at 04:52

    foarte frumos spus si minutios descompus procesul, aproape ca in delirurile lui Freud pe cocaina. doar ca intr-un sistem de mii de kW incepi sa auzi si cu organele. vibe/ul din techno music e (si) vibratia membranelor din difuzoarele alea multe si negre, care fac sa se miste paharele pe masa. masinaria delicata a auzului e mai mult decat socata de soundul din cluburi si de pe stadioane (acolo unde soundul e sound si inginerul de sunet nu doarme pe mixere). e un soc mecanic, dincolo de electrochimie si mecanica fina.

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