Tsawg-pass lim - yuav ua li cas kom tau zoo suab?

Yog li ntawd muaj coob tus neeg xav nyob rau hauv qhov uas tsis muaj-pass lim, uas yog yuav tsum tau rau cov subwoofer. Feem ntau, tib neeg pob ntseg yuav perceive suab, pib nrog 20 thiab xaus nrog 20 txhiab Hertz. Thiab nco ntsoov, lub suab ntawm cov uas tshwm sim nyob rau sab txwv - qhov no ntses bass thaj tsam. Raws li, nyob rau sab sauv txwv suab ntau zoo li ib tug squeak. Rau cov neeg uas xav kom kawm tau li cas rau suab suab sib txawv frequencies, qhia tshwj xeeb uas tsim qhov kev pab cuam uas tsis yuav tsum tau ib daim installation. Koj tsuas yuav tau mus download tau thiab ua si nws. kuj tsis ua kom muaj kev nyuaj interface kev pab cuam.

Nyob rau hauv txoj kev tshawb no cas ib tug tsis tshua muaj-pass lim, ib tug yuav tsum tsis txhob hnov qab txog lub cutoff zaus, uas nce yog tsis tsim nyog. Nyob rau hauv lub chaw ua khoom ntawm lub subwoofer ua li ntawd kom txo frequencies tsis nyuaj unchanged, thaum siab frequencies yog kis tau nrog loj distortion. Ua li no, siv ib tug tshwj xeeb lim hais tias tshem tawm tag nrho lub suab siab dhau heev lawm.

Subwoofer yuav tsum tau raws li cov nram qab no tsis: lub tsawg hais lus, ua si nrog nws, ib tug subwoofer, ntau dua qhov lub cut-off zaus ntawm cov ntxaij lim dej uas yog siv nyob rau hauv Saba. Nyob rau hauv lwm yam lus, yog hais tias tus kem muaj desyatisantimetrovyh ntses bass thaj tsam hais lus, lub cutoff zaus yuav tsum mus txog peb puas Hertz. Yog hais tias lub ntses bass thaj tsam hais lus loj yog peb caug centimeters, lub lim cutoff zaus nce mus txog ib puas Hertz.

Tab sis yog hais tias tus subwoofer muaj ib tug me me hais lus, nws yog yuav nws yuav tsis tau rau cov me nyuam muaj tsawg kawg nkaus frequencies. Yog hais tias qhov teeb meem no yog ntxeev, lub sub yuav tau recreate rau lub ntses bass thaj tsam. Qhov ntawd yog ib tug zoo subwoofer yuav txiav txim los ntawm yuav ua li cas zoo nws yuav tsum tau rov qab uas tsis muaj frequencies. Ntau dua frequencies yog feem ntau subwoofer reproduces muaj zog heev distortions.

Nyob rau hauv dav dav, lub cut-off zaus tsis ua kom muaj teeb meem. Nws tseem mus xav txog nws tus kheej ib tug tsawg pass lim. Nws yuav ua tau passive los yog kom nquag plias. Nyob rau hauv lub yav tas los cov ntaub ntawv rau lub lim yog ib tug zoo inductance kauj nrog ntau capacitors. Nyob rau hauv cov ntaub ntawv no, qhov yuav tsum tau rau nruab cais amplifiers tshwm sim. Tsis tas li ntawd, tsis txhob xav tau rau nruab tej yam ntxiv fais fab mov. Passive lim yuav tsum tau kev cob cog rua ncaj qha mus rau cov lus qhia ntawm lub subwoofer.

Lwm point uas yuav tsum tau paub txog thaum kawm no lub npe yog tus nqes hav lwj, uas yog ib txog kev parameter qhia tus quab yuam uas lub suab yog suppressed mus rau ib theem saum toj no lub cutoff zaus. Feem ntau, thaum txhim kho cov ntxaij lim dej ntawm siab zaus suab disappearance yuav tsum tshwm sim ntseeg nkaws tsis slumps.

Vim lub fact tias cov uas tsis muaj-pass lim siv ib tug uas tsis muaj cutoff zaus, thiab muaj ib tug high kev txiav txim, qhov yuav tsum tau rau passive qauv disappears. Nyob rau hauv cov ntaub ntawv no nws yog tsim nyog los siv ib qho active lim. Nws drawback yog cov yuav tsum tau hais tias ib tug nyias muaj nyias ib lub hwj huam mov thiab amplifier mus rau lub subwoofer channel. Nyob rau hauv tas li ntawd, lub adder tej zaum yuav tsim nyog nyob rau hauv tej rooj plaub.

Nyob rau hauv no yooj yim tsis uas muaj ib tug tsis tshua muaj pass lim, muaj cai.