Abstract
Two experiments are reported in which underwater intelligibility capability of three standard word lists were evaluated. As would be expected, closed-set word lists produced higher scores than did open-ended tests. Alternate forms of two tests were compared and the results indicated that lists which are “equated for difficulty” in normal environments also are reasonably equated underwater. A preliminary analysis of phoneme-type distortion was derived from one closed-set test. The results appeared to demonstrate that, for this type of experiment, the most common phoneme error made by divers was in place of production, and that fricatives were most affected.
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