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ASA/ANSI S3.42-2012/Part 2/IEC 60118-15:2012 (R2025)
Testing Hearing Aids – Part 2: Methods for characterizing signal processing in hearing aids with a speech-like signal (a nationally adopted international standard)
This standard describes a recommended speech-like test signal, the International Speech Test Signal (ISTS), and a method for the characterization of hearing aids using this signal with the hearing aid set to actual user settings or to the manufacturers' recommended settings for one of a range of audiograms. For the purposes of this standard the hearing aid is considered to be a combination of the physical hearing aid and the fitting software which accompanies it.
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Acoustical Society of America [asa]