DIN EN 61094-4:1996-05 Measurement microphones - Part 4: Specifications for working standard microphones (IEC 61094-4:1995); German version EN 61094-4:1995
1996DIN EN 61094-4:1996-05 Measurement microphones - Part 4: Specifications for working standard microphones (IEC 61094-4:1995); German version EN 61094-4:1995
1996DIN EN 61094-4:1996 Measurement microphones - Part 4: Specifications for working standard microphones (IEC 61094-4:1995); German version EN 61094-4:1995