This document specifies a method for the objective determination of the odour concentration of a gaseous sample using dynamic olfactometry with human assessors. The standard also specifies a method for the determination of the emission rate of odours from stationary sources, in particular: - point sources (conveyed or ducted emissions); - active area sources (e.g. biofilters). The primary application of this standard is to provide a common basis for evaluation of odour emissions.