Noise meter ntsuas calibration yuav tsum xyuam xim rau qhov teeb meem
1) Siv lub suab siab: 94dB.
2) Kev taw qhia xwm txheej: axial kev taw qhia ntawm lub microphone.
3) Microphone reference point: nruab nrab ntawm microphone diaphragm.
4) Kev kho cov ntaub ntawv los ntawm lub suab siab teb rau cov lus teb dawb (saib qhov xwm txheej kev taw qhia).
Zaus (Hz) 1k 1.25k 1.6k 2k 2.5k 3.15k
Kho dB 0 2 0 3 0 4 0 5 0 6 0.8
Zaus (Hz) 4k 5k 6.3k 8k 10k 12.5
Kho dB 0 2 0 3 0 4 0 5 4 5 6.2
5) Cov khoom siv hluav taws xob sib npaug: Cov khoom siv hluav taws xob sib npaug tuaj yeem siv los hloov lub microphone rau kev ntsuas hluav taws xob, lub peev xwm ntawm qhov sib npaug hluav taws xob impedance yog 20pF, thiab cov rwb thaiv tsev tiv thaiv ntau dua 1GΩ. Lub shielding lub tog raj kheej nruab nrog qhov sib npaug hluav taws xob impedance yuav tig rau ntawm lub preamplifier thaum nws siv.
6) Cov suab nrov tshaj plaws tom qab: Thaum lub suab ntsuas ntsuas tau muab tso rau hauv lub suab qis qis thiab thaum lub microphone hloov los ntawm cov lus hais saum toj no thiab luv luv, qhov siab tshaj plaws tom qab suab nrov yog 23dB (hluav taws xob suab nrov yog 23dB) .
7) Tso cai * siab dua * suab siab theem ntawm lub microphone: 145dB
8) * Qhov siab tshaj plaws input voltage ntawm cov khoom siv hluav taws xob: 10 Vp-p
9) Kev khiav hauj lwm voltage ntau thaum lub suab ntsuas ntsuas raws li cov kev cai: 4.8V ~ 6V.
10) Lub sijhawm ib txwm xav tau kom ruaj khov raws li kev siv ib puag ncig ib puag ncig tom qab kev hloov pauv ib puag ncig: yam tsawg kawg 12 teev, yam tsawg kawg 19 teev nyob rau hauv lwm yam kev mob ib puag ncig.
