產(chǎn)品簡(jiǎn)介項(xiàng)目參數(shù)產(chǎn)品名稱(chēng)聲級(jí)計(jì)校準(zhǔn)器(噪音計(jì)校準(zhǔn)器)產(chǎn)品型號(hào)ND9A ND9B標(biāo)準(zhǔn)ANSIS1.40CLASS2,IEC942輸出聲級(jí)94dB 114dB頻率1000Hz+2.4%準(zhǔn)確度0.5dB(ND9B:0.3dB)電源9V6F22BATTERY外形尺寸145X47X47mm應(yīng)用1 ,1/2 聲級(jí)計(jì)的校準(zhǔn)