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
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基本信息
标准编号： NFS 31 990:1988
标准类别：MiscPublication
出版单位：Association Francaise de Normalisation
标准页数：13
标准简介
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
替代本标准的新标准
