NFS 31 990:1988被替代
Sound System Equipment - The Objective Rating Of Speech Intelligibility In Auditoria By The 'rasti' Method
出版：Association Francaise de Normalisation
專家解讀視頻
基本信息
標準編號： NFS 31 990:1988
標準類別：MiscPublication
出版單位：Association Francaise de Normalisation
標準頁數：13
標準簡介
Gives an objective method for rating the quality of speech transmission with respect to intelligibility. Is intended for rating speech transmission in auditoria with or without sound systems. This publication has the status of a report
替代本標準的新標準
