Video: Qib decibel ntawm lub suab nrov hauv chav kawm li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv 50 feem pua ntawm cov tsev kawm ntawv qhov nruab nrab suab nrov ntsuas yog 70 dB. LEEJ TWG pom zoo kom muaj suab nrov tshaj plaws ntawm 35 dB hauv cov tsev kawm ntawv. Raws li txoj cai ntawm tus ntiv tes xoo, lub suab nrov tshaj plaws ntawm 45dB ib raug pom zoo sab nraum cov tsev thaum hmo ntuj thiab 55dB ib thaum nruab hnub. Lub suab nrov ntawm 60 thiab 65 dB yog suav tias tsis xis nyob.
Ntawm no, lub suab nrov li cas yog dab tsi?
(Frequency txhais tau hais tias lub suab qis los yog siab npaum li cas.) Tab sis txhua lub suab uas nrov txaus thiab kav ntev txaus tuaj yeem ua rau tsis hnov lus thiab ua rau tsis hnov lus. Lub suab nrov yog ntsuas hauv decibels (dB). Ib txwm Kev sib tham yog kwv yees li 60 dB, lub tshuab txiav nyom yog li 90 dB, thiab lub suab paj nruag nrov yog li 120 dB.
Tsis tas li ntawd, koj ua li cas nqus suab nrov hauv chav kawm? Txhim kho chav kawm Acoustics
- Muab ntaub pua plag lossis ntaub pua plag rau hauv chav.
- Dai curtains los yog blinds nyob rau hauv lub qhov rais.
- Khaws cov ntaub ntawv mos xws li muaj kev xav lossis corkboard rau ntawm phab ntsa.
- Muab cov ntxhuav tso rau ntawm lub kaum sab xis nyob ib ncig ntawm chav tsis yog nyob rau hauv kab.
- Tua cov khoom nrov nrov thaum nws tsis siv.
- Hloov cov teeb pom kev tsis zoo.
Ib yam li ntawd, pes tsawg decibels yog lub tswb tsev kawm ntawv?
Tswb hauv txoj kev hauv tsev (tus nqi siab tshaj ntsuas los ntawm qhov deb ntawm 2 meters), 115 dB. Chav kawm suab paj nruag: Cov tub ntxhais kawm hais lus (suab nrov tom qab tsis muaj suab paj nruag), 68-73 dB. Tsev kawm ntawv chav ua noj: Cov tub ntxhais kawm hais lus thiab ua noj ua haus (cov suab nrov tom qab tsis muaj suab nrov ntawm lub tshuab), 67-80 dB.
Yam khoom siv twg yuav tsum tau ntsuas lub suab nrov hauv chav kawm?
Cov cuab yeej siv feem ntau siv los ntsuas lub suab nrov yog cov suab qib meter ( SLM ), kev sib koom ua ke suab qib meter (ISLM), thiab lub suab dosimeter. Nws yog ib qho tseem ceeb uas koj nkag siab txog qhov ntsuas ntsuas, kev ua haujlwm thiab nyeem cov ntsuas koj siv.
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