This International Standard is the frame standard introducing the series ISO 11201 to ISO 11205 of basic International Standards on the determination of emission sound pressure levels at work stations and other specified positions (ISO 11201 to ISO 11205). It is a guide aiming at: - facilitating the writing of noise test codes; - providing physical explanations on this noise emission quantity as compared to other noise quantities (4.1 to 4.3); - comparing the different measurement methods offered by the series (Clause 5, Table 1); - facilitating the choice of the most appropriate method(s) in typical practical situations (Clause 6). This International Standard is largely based on flow-charts and tables. Case studies are described. The guidance given applies only to airborne sound. It is for use in noise testing in general and in the preparation of noise test codes, in particular. A standardized noise test code should select standards in the series ISO 11201 to ISO 11205 that are the most appropriate to the machinery family it covers, give detailed requirements on mounting and operating conditions for the particular family, as well as the location of the work station(s) and other specified positions as prescribed in these International Standards. The data so obtained may be used for the declaration and verification of emission sound pressure levels e.g. as specified in ISO 4871.