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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
Acoustical Society of America [asa]