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Unaided and FM-aided speech perception scores (CNC words at 0 dB SNR) for each of the Friedreich ataxia subjects. Also shown are the mean ±1 SD scores for the Friedreich ataxia and matched control groups. Abbreviation: CNC, consonant-nucleus-consonant; FRDA, Friedreich ataxia; SD, standard deviation; SNR, signal-to-noise ratio.
