Current stage: 40.00 DIS registered Sep 4, 2026
Next stage: CCDV Next stage date : Oct 23, 2026
Originator: IEC
Owner: TC 87
Type: International Standard
ICS: 17.140.50 Electroacoustics
IN_DEVELOPMENT IEC 63440 ED1 40.00 DIS registered Sep 4, 2026
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