Zaus hnyav rau lub suab ntsuas ntsuas
Qhov ntsuas qhov ntsuas zaus hauv lub suab ntsuas muaj peb tus qauv ntsuas qhov hnyav: A, B, thiab C. Nws yog ib qho kev kho Circuit Court tsim los kho qhov kev hnov lus raws li cov lus teb ntawm tib neeg lub pob ntseg kom suab. Nws attenuates suab sib txawv frequencies mus txawv degrees raws li qhov sib npaug loudness curves. A-weighted network simulates tib neeg pob ntseg cov lus teb rau 40-square ntshiab suab nyob rau hauv qhov sib npaug zos nrov nkhaus. Nws cov duab nkhaus yog rov qab rau ntawm 40-square sib npaug zos nrov nkhaus, uas ua rau ntau dua attenuation nyob rau hauv nruab nrab- thiab tsawg-frequency bands ntawm hluav taws xob teeb liab. B-weighted network simulates tib neeg pob ntseg cov lus teb rau ib tug 70-meter ntshiab suab, uas attenuates lub low-frequency band ntawm hluav taws xob teeb liab rau ib tug tej yam. C-weighted network simulates cov lus teb ntawm tib neeg pob ntseg mus rau 100 square meters ntawm lub suab ntshiab, thiab muaj ib tug yuav luag tiaj tus teb nyob rau hauv tag nrho cov suab ntau zaus.
Lub suab siab ntsuas ntsuas los ntawm qhov hnyav network tsis yog lub suab siab ntawm lub hom phiaj lub cev (tseem hu ua linear sound pressure level), tab sis lub suab siab hloov kho los ntawm kev hnov lus, uas yog hu ua weighted sound level. Lub suab siab ntsuas ntsuas los ntawm lub suab ntsuas ntsuas los ntawm qhov ntsuas qhov ntsuas zaus yog hu ua suab theem. Lub suab qib nyeem tau los ntawm lub suab ntsuas ntsuas yuav tsum qhia qhov ntsuas ntsuas. Piv txwv li, yog siv A-weighted network thiab chav tsev yog dB, nws yuav tsum tau sau ua dB (A). Raws li qhov hnyav network siv, lawv raug hu ua A suab theem, B suab theem thiab C suab theem, thiab cov chav nyob raug kaw ua dB (A), dB (B) thiab dB (C). Piv txwv li, yog tias 70dB cov ntaub ntawv raug ntsuas los ntawm C qhov hnyav, nws yuav tsum raug kaw li 70dB (C) lossis C suab qib 70dB. Yog tias 50dB cov ntaub ntawv raug ntsuas siv A qhov hnyav, nws yuav tsum raug kaw ua 50dB (A) lossis A suab qib 50dB.
