DIN EN 60118-7:2006 电声学.助听器.第7部分:助听器生产、供货和交货质量保证的性能特性测试
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