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- W2000830392 abstract "The expected effectiveness of an industrial paging system for presentation of emergency messages has been evaluated in terms of sentence intelligibility (SI). The evaluation was based on the Speech Transmission Index concept developed by Houtgast and Steeneken [J. Acoust. Soc. Am. 67, 318–326 (1980)]. Changes in SI were evaluated for 17 paging system locations with nominal signal-to-noise ratios ranging from −21 to +15 dB and reverberation times ranging from 0.3 to 1.6 s. The change in signal level required to achieve a design goal of 90% and 97% SI was evaluated as a function of (1) the average age of the listeners (30 or 40 years), (2) the percentage (50% or 90%) of this age group who would achieve the desired SI, and (3) the number of message repetitions. The primary result is to point out that the influence on required signal level of message repetitions was found to be at least as important as the other factors. This influence is not included in the usual engineering methods for evaluating communication systems. Conflicts between alternate prediction models for the effect of message repetition according to current signal detection theory and earlier experimental work are considered." @default.
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- W2000830392 date "1982-04-01" @default.
- W2000830392 modified "2023-10-18" @default.
- W2000830392 title "Sensitivity of predicted effectiveness of a paging system to design criteria" @default.
- W2000830392 doi "https://doi.org/10.1121/1.2019272" @default.
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