2021DIN EN IEC 60268-22:2021 Sound system equipment - Part 22: Electrical and mechanical measurements on transducers (IEC 60268-22:2020); German version EN IEC 60268-22:2020
2019DIN EN IEC 60268-22:2019 Sound system equipment - Electrical and mechanical measurements (IEC 100/3233/CD:2019); Text in German and English