Qee qhov kev taw qhia txog lub suab ntsuas ntsuas
Kev piav qhia ntawm cov npe
Muaj peb hom kev sib txuas lus hnyav: A, B thiab C. A-hnyav suab theem simulates cov yam ntxwv zaus ntawm cov suab nrov qis qis qis dua 55dB, B-hnyav suab theem simulates cov yam ntxwv zaus ntawm cov suab nrov nruab nrab ntawm 55dB txog 85dB, thiab C -weighted suab theem simulates tus yam ntxwv zaus ntawm kev siv suab nrov. Qhov sib txawv tseem ceeb ntawm peb yog qib ntawm attenuation ntawm qhov tsawg zaus ntawm lub suab nrov, nrog A attenuating tshaj plaws, B qhov thib ob, thiab C tsawg tshaj plaws. A-hnyav suab qib yog qhov siv dav tshaj plaws hauv kev ntsuas suab nrov hauv ntiaj teb vim nws cov yam ntxwv nkhaus nyob ze rau cov yam ntxwv ntawm tib neeg pob ntseg, thiab B thiab C tau maj mam tsis siv.
Txhais:
Noise meter Kuj hu ua (noise meter, sound level meter) yog cov cuab yeej yooj yim tshaj plaws hauv kev ntsuas suab nrov. Lub suab ntsuas ntsuas feem ntau yog tsim los ntawm condenser microphone, preamplifier, lub attenuator, amplifier, lub ntsuas hluav taws xob zaus, thiab RMS qhia lub taub hau. Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub suab ntsuas lub suab yog: lub microphone hloov lub suab mus rau hauv lub teeb liab hluav taws xob, thiab tom qab ntawd lub preamplifier hloov lub impedance kom lub microphone phim lub attenuator. Lub amplifier ntxiv cov teeb liab tso tawm rau lub network, hnyav lub teeb liab rau kev suav zaus (lossis cov lim sab nraud), thiab tom qab ntawd nthuav tawm cov teeb liab rau qee qhov amplitude los ntawm attenuator thiab amplifier, thiab xa mus rau RMS detector.
Kev faib tawm:
1, los ntawm cov khoom ntsuas, tuaj yeem muab faib ua ib puag ncig lub suab nrov (suab teb) cov yam ntxwv ntawm kev ntsuas thiab ntsuas cov yam ntxwv ntawm lub suab.
2, Los ntawm lub sijhawm tus yam ntxwv ntawm lub suab los yog lub suab teb, nws tuaj yeem muab faib ua qhov ntsuas suab nrov tsis tu ncua thiab ntsuas suab nrov tsis nyob hauv lub xeev. Lub suab nrov tsis nyob ruaj khov tuaj yeem muab faib ua lub suab hloov pauv raws sijhawm, suab nrov hloov pauv tsis tu ncua thiab lub suab impulse.
3, Los ntawm cov yam ntxwv zaus ntawm lub suab los yog suab teb, nws tuaj yeem muab faib ua cov suab nrov nrov, suab nrov thiab suab nrov uas muaj cov suab nrov nrov.
4, Los ntawm kev ntsuas qhov tseeb ntawm qhov yuav tsum tau ua, nws tuaj yeem muab faib ua qhov ntsuas qhov tseeb, ntsuas kev tsim vaj tsev thiab kev suav pej xeem suab nrov.
