Projects of NA 001-02-03 AA

Document number Begin Title Comment
DIN 8989 2025-03-19 Acoustical design in buildings - Lifts More  Comment 
DIN EN ISO 7235 rev 2025-01-29 Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss More  Comment 
ISO/CD 7235 2024-12-16 Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss More  Comment 

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