Dab tsi yog qhov hnyav?
Dab tsi yog qhov hnyav?

Video: Dab tsi yog qhov hnyav?

Video: Dab tsi yog qhov hnyav?
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A- hnyav yog qhov sib txawv ntawm qhov nkhaus (lossis lim) uas yog siv rau lub suab siab microphone ntsuas kom ua raws li cov kev cuam tshuam ntawm tib neeg lub rooj sib hais. Muab tib lub suab siab, cov ntaub ntawv kaw lus microphone tuaj yeem sib txawv ntau dua li cov qib pom los ntawm tib neeg pob ntseg (Daim duab 1).

Tsis tas li ntawd, qhov hnyav A thiab C yog dab tsi?

Qhov "A" hnyav suab theem kev ntxub ntxaug tawm tsam tsawg zaus, zoo ib yam li cov lus teb ntawm pob ntseg. Cov " C " hnyav suab theem tsis cais tawm ntawm qhov tsawg zaus thiab ntsuas qhov sib npaug ntawm ntau zaus ntawm 30 txog 10,000 Hz.

Ib yam li ntawd, qhov hnyav txhais li cas? A luj txhais tau tias yog hom nruab nrab . Hloov ntawm txhua cov ntaub ntawv taw tes pab sib npaug rau qhov kawg txhais tau tias , qee cov ntaub ntawv cov ntsiab lus pab txhawb ntau hnyav ” dua lwm tus. Weighted txhais tau tias muaj ntau heev hauv kev txheeb cais, tshwj xeeb tshaj yog thaum kawm cov pej xeem.

Ib yam li ntawd, qhov hnyav decibels yog dab tsi?

A- hnyav decibels , abbreviated dBA, or dBa, los yog dB (a), yog ib qho kev qhia ntawm cov suab nrov ntawm cov suab hauv huab cua raws li pom los ntawm tib neeg pob ntseg. Hauv A- hnyav system, ua decibel Qhov tseem ceeb ntawm cov suab ntawm cov zaus tsawg yog txo, piv nrog cov tsis hnyav decibels , nyob rau hauv uas tsis muaj kev kho yog tsim rau suab zaus.

Yuav ua li cas koj xam qhov hnyav nruab nrab?

Basic formula rau a hnyav nruab nrab qhov twg qhov hnyav ntxiv txog 1 yog x1(w1) + x2(w2) + x3(w3), thiab lwm yam, qhov twg x yog txhua tus lej hauv koj lub teeb thiab w yog qhov sib thooj hnyav yam. Nrhiav koj hnyav nruab nrab , tsuas muab txhua tus lej los ntawm nws qhov hnyav thiab tom qab ntawd suav cov lej uas tau tshwm sim.

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