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ASA/ANSI S3.37-1987 (R2025)
Preferred Earhook Nozzle Thread for Postauricular Hearing Aids
This standard describes a preferred thread for earhook nozzles on postauricular hearing aids. The need for such a standard arises from the wide variety of earhooks that hearing aid dispensers are required to keep in inventory to utilize different postauricular hearing aids from several manufacturers
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Acoustical Society of America [asa]