Cov txheej txheem ntawm Noise Level Detection
1. Yooj yim ntawm - qhov chaw sim Simple ntawm - qhov chaw sim, feem ntau siv cov ntsuas suab nrov (tseem hu ua suab nrov meter) txhawm rau kuaj lub suab nrov ntawm cov khoom siv. Thaum nyob ntawm -kev tshuaj xyuas qhov chaw, ua ntej kwv yees qhov loj ntawm cov cuab yeej, thiab tom qab ntawd txiav txim siab qhov chaw ntawm qhov ntsuas. Xav tias qhov siab tshaj plaws ntawm cov cuab yeej yuav tsum tau kuaj yog D, thiab cov haujlwm ntawm cov ntsiab lus xeem yog raws li hauv qab no: Thaum D< 1="" meter,="" the="" distance="" between="" the="" test="" points="" and="" the="" surface="" of="" the="" equipment="" is="" 30="" cm.="" when="" d-1="" meter,="" the="" test="" point="" is="" 1="" meter="" away="" from="" the="" surface="" of="" the="" equipment.="" when="" d="">1 meter, qhov ntsuas qhov ntsuas yog 3 meters deb ntawm qhov chaw ntawm lub cuab yeej. Rau cov khoom siv dav dav, 4 cov ntsiab lus xeem yuav tsum raug xaiv, thiab 6 ntsiab lus rau cov khoom siv loj. Qhov ntsuas qhov siab yog feem ntau: cov khoom siv me me yog 2/3 ntawm qhov siab ntawm cov khoom siv; cov khoom nruab nrab yog 1/2 ntawm cov cuab yeej siab; cov khoom loj yog 1/8 ntawm cov cuab yeej siab. Rau cov kiv cua, compressors, twj tso kua mis, cov khoom siv iav, thiab lwm yam, thov xa mus rau Japanese JIS cov qauv. Feem ntau hais lus, qhov kev xeem ib puag ncig yog qee zaum nyuaj kom ua tau raws li, thiab qhov kev xeem tsuas yog ua lub luag haujlwm kwv yees lub sijhawm no.
