當(dāng)前位置:
首頁(yè) >
標(biāo)準(zhǔn)詳情頁(yè)

Sound Calibrators
出版:Association Francaise de Normalisation

專家解讀視頻
基本信息
標(biāo)準(zhǔn)編號(hào): NFS 31 139:1998
標(biāo)準(zhǔn)類別:MiscPublication
出版單位:Association Francaise de Normalisation
標(biāo)準(zhǔn)頁(yè)數(shù):15
標(biāo)準(zhǔn)簡(jiǎn)介
Specifies the performance requirements for three classes of sound calibrator. Sound calibrators are designed to produce a known effective sound pressure level or levels at a specified frequency or frequencies when coupled to specified models of microphone or specified configurations