From Wikipedia, the free encyclopedia
De Norm-Schoipegldiffarenz Dn [dB] (dt. Norm-Schallpegeldifferenz, engl. Normalized Level Difference) is de Schoipegldiffarenz zwischn Sende- und Empfaungsraum, umgrechnat auf a genormte Schoiabsorptionsflächn im Empfaungsraum.
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