NFC 97 317:1992现行
Sound System Equipment - Standard Volume Indicators
出版：Association Francaise de Normalisation
专家解读视频
Gives the characteristics to be specified, performance requirements and the relevant methods of measurement for electromechanical volume indicators. The concept of "volume" is a practical way of assigning a numerical value to the magnitude of electrical speech and music programme signals.
IEC 60268-17 : 1.0 - Identical
HD 483.17 : 200S1 - Identical
HD 483.17 : 200S1 - Identical
IEC 60268-17 : 1.0 - Identical
HD 483.17:1992 - Identical
IEC 60268-17 Ed. 1.0 - Identical
