Electret microphone

Electret microphone yog ib hom ntawm condenser microphones. Nyob rau hauv Feem ntau, cov microphones yog siv nyob rau hauv kev studios, tab sis tej zaum yog haum rau pib xyaum ua lub hom phiaj. Feem ntau, cov capacitor electret microphones feem ntau siv rau equip ib lub tsev txias studio.

Nyob rau hauv lub niaj hnub Lavxias teb sab kev ua lag luam yuav nrhiav tau ib tug lossis loj ntau yam ntawm cov khoom. Cov tam sim no proposals yuav xaiv tus electret microphone, ob qho tib si txawv teb chaws thiab domestic ntau lawm. Yog hais tias peb tham txog cov nqi teeb meem, lub microphones ntawm txawv teb chaws ntau lawm yog kim kim dua lub Lavxias teb sab. Nyob rau hauv Feem ntau, qhov no nce nyob rau hauv tus nqi yog tsis ntau txaus cai li electret microphone Lavxias teb sab ntau lawm yog tsis inferior nyob rau hauv zoo rau txawv teb chaws sawv daws yuav.

Tam sim no microphones suab hloov txoj kev cai no yam microphones muaj ntau tsim. Yog vim li cas yog tias nyob rau hauv heev uas tsis muaj nqi electret microphone yog yus muaj los ntawm siab cia siab rau, tsis muaj qhov hnyav thiab ib tug ca zaus teb.

Microphones ntawm no hom yog capacitors, ib co kev uas daim hlau no yog ua los ntawm ib tug heev nyias zaj duab xis ncav us txog ntau tshaj ib tug nplhaib. Yas zaj duab xis yog irradiated nrog ib tug beam ntawm electrons uas txeem mus rau ib tug me me qhov tob, thiab raws li ib tug tshwm sim tsim ib qhov chaw them nyiaj muaj lub peev xwm los cawm tau ib tug ntev lub sij hawm.

Nyob rau hauv no hom ntawm insulators muaj lub npe "electret" - thiaj li hais tias cov microphone no kuj hu ua ib tug electret.

Tom qab superimposed on zaj duab xis yog txaus nyias hlau txheej, uas yog siv raws li ib tug ntawm cov electrodes. Raws li ib electrode protrudes hlau kheej kheej, uas nws planar nto nyob ze ntawm lub zaj duab xis.

Nws oscillations uas yog tshwm sim los ntawm acoustic tsis, muaj peev xwm tsim ib tug hluav taws xob tam sim no ntawm cov electrodes. Vim lub fact tias lub dag lub zog ntawm qhov tam sim no yog txaus me me thiab cov qhov tso zis impedance nce mus txog gigaomov, cov kis lub teeb liab generated los ntawm cov microphone, ua nyuaj heev. Raws li ib tug tshwm sim, nyob rau hauv thiaj li yuav phim qhov uas tsis muaj impedance ntawm lub amplifier nrog ib tug high school cov impedance microphone, nws yog tsim nyog los siv ib txoj kev theem, uas yog cov txheej txheem ntawm nyob rau hauv lub teb (unipolar) transistor uas yog cov txheej txheem ntawm nyob rau hauv lub microphone capsule vaj tse nyob.

Lub tsev nyob ntawm lub tshuaj ntsiav yuav tsum tau ua los ntawm ib tug hlau muaj peev xwm txoj kev ntsuas ib tug microphone thiab harmonize theem, tiv thaiv nws los ntawm lwm hluav taws xob teb.

Feem ntau, cov tshuaj ntsiav ntawm no yog ib tug ntaus ntawv nyob rau hauv uas nws lub tsev yog tsis tau tsuas yog ib tug microphone electret nws tus kheej, tab sis kuj piv theem.

Nyob rau hauv thiaj li yuav to taub seb yog haum rau ib tug electret microphone los sis hais tias ib tug microphone amplifier, nws yog txaus mus txuas rau lub tswv yim nkaus ntawm lub multimer. Yog hais tias cov kev tshwm sim ntawm tus dais qhia tau hais tias 2-3 volts, qhov no txhais tau tias cov amplifier yog haum rau siv nrog electret microphone. Muaj ntau microphone amplifiers siv nyob rau hauv ib co computer suab card los yog built-in, uas yog xam raws li ib lub sij hawm mus ua hauj lwm nrog electret microphone.

Lub hauv paus ntsiab lus ntawm cov lag luam ntawm electret microphones yog raws li nyob rau hauv lub peev xwm ntawm ib co ntaub ntawv uas muaj dielectric tsis tu ncua, hloov lawv nto xwb raws li ib tug tshwm sim ntawm tej yam ntawm lub suab yoj. Electret microphones muaj heev kuj, yog li ntawd nws yog tau mus cuag lawv mus rau ib qho amplifier uas muaj tswv yim impedance.

Los ntawm kev tsim, cov microphones raug muab faib ua peb pawg: electret khoom yog nyob rau hauv pem hauv ntej txoj hauj lwm; Electret khoom yog thov mus rau lub saj zawg zog membrane; electret yog nyob rau hauv rov qab phaj.

Rau hnub tim, ib tug thawj coj nyob rau hauv zus tau tej cov kev cov ntaubntawv povthawj siv khoom yog lub tuam txhab "octave", uas nws microphones muaj ib tug neeg ncaj lub koob npe nrov.

"Octave" FEM - Series, uas muaj xws li ob peb cov qauv ntawm cov kev electret microphones, uas yog tsim rau cov txawv tej yam kev mob ntawm kev siv. Kev mloog yuav tsum tau them mus rau lub tuam txhab novelty - ib tug microphone, "octave" FEM - 222, uas yog tsim los rau cov ntaubntawv povthawj siv rooj sib tham.