Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index (IEC 100/3202/CDV:2019); German and English version prEN IEC 60268-16:2019
Acoustics - Determination of sound immission from sound sources placed close to the ear - Part 2: Technique using a manikin (ISO 11904-2:2004); German version EN ISO 11904-2:2004— 23 стр.