Relative benefits of stepped and constant bore earmoulds: a crossover trial.


Twenty-one first-time hearing aid candidates took part in a crossover trial which compared a stepped earmould of the 8CR design with a standard constant-bore earmould, each fitted to a low-powered National Health Service behind-the-ear hearing aid. Before fitting the aid, and also after 2-week trials with each earmould, aided speech-in-noise discrimination… (More)


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