指針式噪音計(jì)聲級(jí)計(jì)YF20簡(jiǎn)介--------------------------------------------------------------------------------量程:低LO:40~80dB高HI:80-120dB--------------------------------------------------------------------------------指針式噪音計(jì)聲級(jí)計(jì)YF20詳細(xì)參數(shù)--------------------------------------------------------------------------------◆一個(gè)選擇開關(guān),容易操作◆特制集積電路,工作長期穩(wěn)定◆適合JISdB(A)特性,配有LO(40-80dB)及HI(80-120dB)測(cè)試量程◆特性:◆量程:低LO:40~80dB高HI:80-120dB◆話筒:電容性話筒◆調(diào)校:?jiǎn)握袷幤?/div>