Ergonomic assessment of speech communication - Part 1: Speech interference level and communication distances for persons with normal hearing capacity in direct communication (SIL method)
NORM herausgegeben am 1.1.1998
Designation standards: ČSN ISO 9921-1
Classification mark: 833530
Catalog number: 51186
Note: UNGÜLTIG
Publication date standards: 1.1.1998
The number of pages: 20
Approximate weight : 60 g (0.13 lbs)
Country: Czech technical standard
Kategorie: Technische Normen ČSN