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DIN IEC/TR 63658
Guidance for AAL services based on the smart speaker in connected home environment (CHE)
DIN EN IEC 60268-20
Sound system equipment - Part 20: Microspeakers
DIN EN 14434
Writing boards for educational institutions - Ergonomic, technical and safety requirements and their test methods; German and English version prEN 14434:2026
prEN 14434
Writing boards for educational institutions - Ergonomic, technical and safety requirements and their test methods
