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DIN 45680:1997
Measurement and evaluation of low-frequency environmental noise
This document describes a method for the measurement and assessment of low-frequency noise immissions inside of buildings caused by airborne and/or structure-borne sound transmission. It should complete the existing methods for the measurement and assessment of noise and should serve for the assessment of low-frequency noise immissions for the protection against considerable irritations.
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Deutsches Institut für Normung [din]