ISO 11205:2003规定了一种工程方法（2级精度），使用声强在现场、工作站或其他指定位置确定机器的发射声压级。它是ISO 11201、ISO 11202和ISO 11204原位测量的替代方案。只要满足背景噪声和现场指标的要求，它适用于各种测试环境。 ISO 11205:2003适用于发射静止宽带噪声的设备。噪声可以在操作周期之间不同，并且可以具有或不具有离散频率或窄带分量。

ISO 11205:2003 specifies an engineering method (grade 2 accuracy) to determine the emission sound pressure level of machines in situ, at the work station or at other specified positions, using sound intensity. It is an alternative to ISO 11201, ISO 11202 and ISO 11204 for in situ measurements. It is applicable to all kinds of test environments provided that the requirements on background noise and field indicators are fulfilled. ISO 11205:2003 is applicable to equipment emitting stationary broadband noise. The noise can differ between operational cycles and can be with or without discrete frequency or narrow band components.