Electroacoustics - Hearing aids - Part 7: Measurement of performance characteristics of hearing aids for production, supply and delivery quality assurance purposes (IEC 60118-7:2005); German version EN 60118-7:2005
电声学.助听器.第7部分:生产、供应和交付质量保证用助听器性能特性的测量(IEC 60118-7-2005);德文版EN 60118-7:2005