Toxicity of combustion products - Guide to the relevance of small-scale tests for measuring the toxicity of combustion products of materials and composites Ingestion-build-117251 Acoustic roughness is defined as

Acoustic roughness is defined as the variation in the height of the running surface associated with rolling noise excitation expressed as a function of distance x along the running surface

It provides guidance that takes into account:

non-road mobile and stationary machinery in the construction

It is strongly recommended that these tests are used as preliminary checks before resorting to the test described in the main text which may be needed for compliance with a specification

4 Conducted transient immunity

Toxicity of combustion products - Guide to the relevance of small-scale tests for measuring the toxicity of combustion products of materials and composites Ingestion-build-117251 Acoustic roughness is defined as