IEC 60268-9 Ed. 1.0 b:1977, Sound system equipment. Part 9: Artificial reverberation, time delay and frequency shift equipment

IEC 60268-9:1977 Sound system equipment. reverberation, time delay and frequency shift.Full text of "Radio Electronics (October...ISO 9241-210:2010 provides requirements and recommendations for human-centred design principles and activities.IEC 60645-4 Ed. 1.0 b:1994, Audiometers - Part 4: Equipment for extended high-frequency.Methods for specifying and measuring the characteristics of artificial.