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Conversion of a head-mounted microphone signal intocalibrated SPL units |
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| Authors: | William S. Winholtz Ingo R. Titze |
| Affiliation: | *Wilbur James Gould Voice Research Center, The Denver Center for the Performing Arts, Denver, Colorado, USA †National Center for Voice and Speech, Department of Speech Pathology and Audiology, The University of Iowa, Iowa City, Iowa, U.S.A. |
| Abstract: | A method is reviewed for conversion of a microphone signal into calibrated Sound Pressure Level (SPL) units. The method follows American National Standards Institute (ANSI) standard for S1.4 SPL meters and requires an accurate SPL meter and an accurate calibration sound source for conversion. Accuracy and validation data from test signals and human phonation are provided. The results indicate that under typical speech conditions, an absolute accuracy of plus or minus 1.6 dB (type I SPL meter) can be obtained with a miniature head-mounted microphone. |
| Keywords: | Sound pressure level Computer program Microphone and vocal intensity |
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