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Comparative Study
. 2013 Jul;134(1):EL33-7.
doi: 10.1121/1.4804944.

Acoustic method for calibration of audiometric bone vibrators. II. Harmonic distortion

Samantha M Ginter  1 , Robert H Margolis
Affiliations
Comparative Study

Acoustic method for calibration of audiometric bone vibrators. II. Harmonic distortion

Samantha M Ginter et al. J Acoust Soc Am. 2013 Jul.

Abstract

A previous report [Margolis and Stiepan (2012). "Acoustic method for calibration of audiometric bone vibrators," J. Acoust. Soc. Am. 131, 1221-1225] described a reliable, inexpensive, acoustic method for calibration of audiometric bone vibrators. As a follow up to that report harmonic distortion measurements were made with the standard electromechanical method and the acoustic method using five Radioear B71 vibrators and one Radioear B81 prototype vibrator. Lower distortion was seen for measurements made with the acoustic method compared to the electromechanical method and for the Radioear B81 vibrator compared to the Radioear B71 vibrator.

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Figures

Figure 1
Figure 1
Total harmonic distortion for a prototype bone vibrator (Radioear B81) at three frequencies measured with the acoustic method (AM) and the electromechanical method (EM).
See this image and copyright information in PMC

References

    1. ANSI (1972). 3.13, American national standard for an artificial headbone for the calibration of audiometric bone vibrators (American National Standards Institute, New York: ).
    1. ANSI (1996). S3.6, Specification for audiometers (American National Standards Institute, New York: ).
    1. IEC (2007). 60318-6, Electroacoustics—Simulators of human head and ear—Part 6: Mechanical coupler for the measurement of bone vibrators (International Electrotechnical Commission, Geneva, Switzerland: ).
    1. IEC (2009). 60318-1, Electroacoustics—Simulators of human head and ear—Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones (International Electrotechnical Commission, Geneva, Switzerland: ).
    1. IEC (2012). 60645-1, Electroacoustics—Audiometric equipment—Part 1: Equipment for pure-tone audiometry (International Electrotechnical Commission, Geneva, Switzerland: ).

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