Sound system equipment - Methods of measuring and specifying the performance of sounders (electroacoustic transducers for tone production) (IEC 61329:1995); German version EN 61329:1996— 13 стр.
Measurement microphones - Part 1: Specifications for laboratory standard microphones (IEC 61094-1:1992 + Corrigendum 1993); German version EN 61094-1:1994
Sound system equipment - Part 11: Application of connectors for the interconnection of sound system components (IEC 60268-11:1987 + A1:1989 + A2:1991); German version HD 483.11 S3:1993