Abstract
The band‐importance function developed by Bell Laboratories is not directly applicable to any of the available recorded speech tests. For this reason we developed a test which is like that used by the Bell Laboratories but unlike other available tests in that (1) each CV or VC is a different utterance (2) the phonemes appear with uniform frequency. The same phonemes used by the Bell Laboratories were used. A “test” consists of utterances by one male and one female talker each speaking 152 CV and VC's following a carrier phrase. The frequency spectrum of this material, as well as the procedure used for its estimate, will be described. Practice effects were studied at different magnitudes of distortion. The importance function which is presumably applicable to this material was found valid within the error of measurement for the filtered speech articulation test results. The error in predicting the articulation score will be related to the magnitude of the intrinsic variability of articulation testing. [Work supported by NINCDS.]
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