BS 5679:1979
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Method (precision) for free-field calibration of one-inch standard condenser microphones by the reciprocity technique
Hardcopy , PDF
15-07-1996
English
29-12-1978
National foreword
Cooperating organizations
1. Scope
2. Object
3. Explanation of terms
3.1 Open-circuit voltage
3.2 Free-field sensitivity of a microphone
3.3 Electrical impedance of a microphone
3.4 Acoustic impedance of a microphone
3.5 Acoustic centre of a microphone
3.6 Principal axis of a microphone
3.7 Free-field conditions
3.8 Reciprocal microphone
4. Principles of a free-field reciprocity calibration
4.1 General
4.2 Acoustic conditions
4.3 Receiving and transmitting characteristics of a
microphone
4.4 Reciprocity procedure
4.5 Attenuation of sound in air
4.6 Final expressions for the free-field sensitivity
5. Absolute accuracy of calibration
5.1 General
5.2 Accuracy of factors influencing a calibration
5.3 Overall accuracy
6. Calibration methods and equipment
6.1 Free field
6.2 Reference configuration of ground shield
6.3 Insert voltage technique
6.4 Acoustic loading
6.5 Dependence on static pressure
6.6 Polarizing voltage
6.7 Acoustic centre of the microphone
6.8 Maximum generator voltage
6.9 Noise
Appendix A - Tables of air attenuation
Appendix B - Values of the position of the acoustic
centre of the microphone
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