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American Journal of Audiology Vol.7 61-72 October 1998. doi:10.1044/1059-0889(1998/011)
© American Speech-Language-Hearing Association
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A Simplified Method for Calibrating a Sound-Level Meter for Use With a Brüel & Kjær Artificial Mastoid

Richard W. Harris 1 and Robert C. Chanaud 2

1 Brigham Young University, Provo, UT
2 Larson-Davis Laboratories, Provo, UT

Richard_Harris{at}byu.edu

The standard method for calibrating a sound-level meter for use with the Brüel & Kjær Artificial Mastoid for bone vibrator tests entails the use of a signal generator, a precision voltmeter, and possibly a frequency counter. This equipment should be certified annually and traceable to the National Institute of Standards and Technology (NIST), and its use generally restricts calibration to a laboratory environment and requires a considerable amount of time. We have developed a simplified method for calibrating the sound-level meter by using a sound-level calibrator and microphone. Using the known sensitivities of the microphone and the artificial mastoid, the sound-level calibrator used for calibration of the microphone may also be used for calibration of the sound-level meter to measure force levels with the artificial mastoid.

Key Words: artificial mastoid, audiometric calibration, bone conduction, bone vibrator, mechanical coupler

Submitted on June 19, 1997
Accepted on May 20, 1998






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