Introduction to Sound Level Meters
Sound Level meter yog ib yam khoom siv los ntsuas lub suab siab thiab qib suab raws li qee qhov kev ntsuas qhov hnyav thiab lub sijhawm hnyav. Nws yog cov cuab yeej siv feem ntau hauv kev ntsuas acoustic, tuaj yeem ua suab nrov, suab nrov, suab nrov ib puag ncig thiab suab nrov nyob, thiab lwm yam, raws li tib neeg lub pob ntseg hnov tus yam ntxwv ntawm qhov kwv yees kev txiav txim siab ntawm nws cov suab nrov ntsuas.
Lub suab ntsuas lub suab tuaj yeem siv rau ib puag ncig suab nrov, cov khoom siv hluav taws xob hluav taws xob, suab nrov nrov, lub tsev acoustics thiab ntsuas electroacoustics. Qee lub suab ntsuas ntsuas kuj tuaj yeem siv los ntsuas kev vibration los ntawm kev hloov lub receiver seem. Kev sib txuas sab nraud lossis sab hauv ntawm octave lim los yog 1/3-octave lim ntawm lub suab ntsuas ntsuas tuaj yeem siv rau kev soj ntsuam spectrum ntawm lub suab nrov.
Nrog rau txoj kev loj hlob ntawm hluav taws xob technology, tshwj xeeb tshaj yog loj-scale integrated circuits thiab computer technology, lub zaus counter, detector thiab lim circuits nyob rau hauv lub suab theem ntsuas tau pom los ntawm cov teeb liab ua technology es tsis txhob ntawm analogue circuits. Qhov no tsis tsuas yog ua rau lub voj voog yooj yim dua, qhov dav dav dav, tab sis kuj tseem txhim kho kev ua haujlwm thiab kev ruaj ntseg, tshwj xeeb tshaj yog lub sij hawm spectrum tsom xam yuav ua tiav, kom lub suab ntsuas ntsuas tau dav siv ntau dua.
Lub suab ntsuas ntsuas muaj microphone, attenuator, hnyav network, amplifier, nrhiav pom network thiab qhov taw qhia. Qhov tseem ceeb tshaj plaws ntawm lub suab ntsuas ntsuas yog lub microphone, uas hloov lub suab lub zog rau hauv lub zog hluav taws xob thiab xa mus rau lub preamplifier ntawm lub tshuab computer, ua kom nrov nrov thiab xa mus rau lub attenuator thiab qhov hnyav network, thiab thaum kawg qhia lub suab. qib nyeem los ntawm tus ntes thiab cov lus qhia nrog qee yam damping yam ntxwv.
