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Journal of Speech and Hearing Research Vol.34 628-635 June 1991.
© American Speech-Language-Hearing Association
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Consistency of Electroacoustic Characteristics Across Components of FM Systems

Linda M. Thibodeau 1
Kathryn A. Saucedo 1
1 University of Texas at Austin

In the absence of national or international electroacoustic standards for the evaluation of Frequency Modulated (FM) amplification systems, it becomes important to know the variability one may expect across similar models. Evaluation of thirty FM systems of the same model obtained from three different educational sites was performed to determine the variability that may occur as a result of the receiver, lapel microphone, or neckloop. There was a range as great as 20 dB in high frequency average saturation sound pressure level and equivalent input noise across receivers, lapel microphones, and neckloops. These results highlight the need for regular electroacoustic monitoring of not only the FM transmitter and receiver, but also the individual components, such as the lapel microphone and the neckloop.

KEY WORDS: amplification/FM systems, electroacoustic measures, rehabilitation

Submitted on March 5, 1990
Accepted on June 12, 1990


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