1. IEC 61094-1/2/3/4/5/6/7, Measurement microphones, series of microphone and calibration standards
2. IEC 61094-4, Measurement microphones, Part 4: Specifications for working standard microphones
3. IEC 61094-1, Measurement microphones, Part 1: Specifications for laboratory standard microphones
4. IEC 50(801), Vocabulary: Acoustics and electroacoustics, 25-8 – Reciprocal Transducer
5. IEC 50(801), Vocabulary: Acoustics and electroacoustics, 23-28 – Free Sound Field