Cinematography — Signal-to-noise ratio of 8 mm Type S, 16 mm and 35 mm variable-area photographic sound records — Method of measurement
电影摄影与摄影；8mm S型、16mm和35mm可变区域摄影声音记录的信噪比——测量方法
1987-08-13
BS 5550-5.4.6-1988
Cinematography. Common to more than one film gauge. Sound-Method for measurement of the signal to noise ratio of 8 mm type, 16 mm and 35 mm variable area photographic sound records
电影摄影 多个胶片测量仪共用 声音8mm、16mm和35mm可变面积摄影声音记录的信噪比测量方法