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Acoustic metrology – an overview of calibration methods andtheir uncertainties

Published online by Cambridge University Press:  07 November 2013

E. Frederiksen
E. Frederiksen*
Affiliation:
ef-consult – retired 2010 from Brüel & Kjaer, Denmark
*
⋆ Correspondence:[email protected]
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Abstract

The paper gives a brief description of the principles and the uncertainty of the acousticcalibration methods that today are applied by National Metrology Institutes andcalibration service centers. Even if some of the calibration principles have been appliedover more than half a century, the methods and the instrumentation are still being refinedin order to minimize their uncertainty, to extend their frequency ranges, to include extraparameters and to speed up slow processes. In addition to the traditional methods formicrophone sensitivity and frequency response calibration, new development areas, like forexample wind power, has created needs for low-frequency and infra-sound calibration, downto 0.1 Hz. Other high-tech areas have lead to the development of methods for phaseresponse comparison calibration of microphones for large arrays, for sound intensitymeasurement and for verification of dynamic linearity of microphones at very high soundpressure levels, up to about 174 dB that corresponds to 10 kPa.

Keywords

Microphone calibrationpressure reciprocityfree-field reciprocitycoupler comparison calibrationelectrostatic actuatorphase response calibrationhigh-pressure calibrationinfrasound calibrationcalibration uncertainty
Type
Research Article
Information
International Journal of Metrology and Quality Engineering , Volume 4 , Issue 2 , 2013 , pp. 97 - 107
Copyright
© EDP Sciences 2013

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References

IEC 61094-1/2/3/4/5/6/7, Measurement microphones, series of microphone and calibration standards
IEC 61094-4, Measurement microphones, Part 4: Specifications for working standard microphones
IEC 61094-1, Measurement microphones, Part 1: Specifications for laboratory standard microphones
IEC 50(801), Vocabulary: Acoustics and electroacoustics, 25-8 – Reciprocal Transducer
IEC 50(801), Vocabulary: Acoustics and electroacoustics, 23-28 – Free Sound Field
IEC 50(801), Vocabulary: Acoustics and electroacoustics, 23-31 – Diffuse Sound Field
Cook, R.K., Absolute pressure calibration of microphones, J. Res. Natl. Bur. Stand. 25, 489–505 (1940) CrossRefGoogle Scholar
Cook, R.K., Absolute pressure calibration of microphones, J. Acoust. Soc. Am. 12, 415–420 (1941) CrossRefGoogle Scholar
L.L. Beranek, Acoustic Measurements (John Wiley & Sons, Inc., New York, London, 1949), p. 113
IEC 61094-2, Measurement microphones, Part 2: Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique
IEC 61094-3, Measurement microphones, Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
G.S.K. Wong, in Primary Pressure Calibration by Reciprocity, edited by G.S.K. Wong, T.F.W. Embleton (AIP Handbook of Condenser Microphones, American Institute of Physics, New York, 1994), Chap. 4
Rasmussen, K., The static pressure and temperature coefficients of laboratory standard microphones, Metrologia 36, 265–273 (1999) CrossRefGoogle Scholar
V. Nedzelnitsky, in Primary Method for Calibrating Free-field Response, edited by G.S.K. Wong, T.F.W. Embleton (AIP Handbook of Condenser Microphones, American Institute of Physics, New York, 1994), Chap. 4
S. Barrera Figueroa, New Methods for Transducer Calibration: ree-field reciprocity calibration of condenser microphones, Ph.D. thesis, Oersted-DTU, Acoustic Technology, Technical University of Denmark, 2003
E. Frederiksen, Turnkey Free-field Reciprocity System for Primary Microphone Calibration, Brüel & Kjaer Technical Review, No. 1 (2009)
IEC 61094-7, Measurement microphones, Part 7: Values for the difference between free-field and pressure sensitivity levels of laboratory standard microphones
Diestel, H.G., Reciprocity Calibration of Microphones in a Diffuse Sound Field, J. Acoust. Soc. Am. 33, 514–518 (1961) CrossRefGoogle Scholar
IEC 61183, Electroacoustics – Random-incidence and diffuse-field calibration of sound level meters
K. Brinkmann, H. Goydke, in Random-incidence and Diffuse-field Calibration, edited by G.S.K. Wong, T.F.W. Embleton (AIP Handbook of Condenser Microphones, American Institute of Physics, New York, 1994), pp. 120–135
IEC 61094-5, Measurement microphones, Part 5: Methods for pressure calibration of working standard microphones by comparison
IEC 61094-6, Measurement microphones, Part 6: Electrostatic actuators for determination of frequency response
E. Frederiksen, in Electrostatic Actuator, edited by G.S.K. Wong, T.F.W. Embleton (AIP Handbook of Condenser Microphones, American Institute of Physics, New York, 1994), p. 231
E. Frederiksen, Infrasound Calibration of Measurement Microphones, Brüel & Kjaer Technical Review, No. 1 (2008)
E. Frederiksen, Verification of High-pressure Linearity and Distortion of Measurement Microphones, in Proceedings of the International Conference on Acoustics, Kyoto, 2004
IEC 61043, Electroacoustics: Instruments for the measurement of sound intensity Measurements with pairs of pressure sensing microphones
E. Frederiksen, Pressure Microphones for Intensity Measurements with Significantly Improved Properties, Brüel & Kjaer Technical Review, No. 4 (1986)
IEC 61672-1, Electroacoustics - Sound Level Meters, Part 1: Specifications
IEC 61672-2, Electroacoustics - Sound Level Meters, Part 2: Pattern Evaluation Test
IEC 61672-3, Electroacoustics - Sound Level Meters, Part 3: Periodic Test
IEC 60942, Electroacoustics - Sound Calibrators