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The Speechmap/DSL fitting system is an integrated approach to fitting hearing aids that takes advantage of the signal generation and measurement capabilities of the Audioscan RM500 real-ear hearing aid analyzer. By combining auditory-area mapping with unique, time-varying test signals and fast automated RECD and REDD measurement procedures, it provides a complete fitting package that addresses many of the sources of error inherent in more traditional methods.
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Cole et al. (1998) studied this question.
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