适用于任何类型的音响系统，以及构成音响系统或用作音响系统辅助设备的部件。通过列出对其规范有用的特性，并为这些特性制定统一的测量方法，来确定音响系统设备的性能，比较这些类型的设备，并确定其适当的实际应用。仅限于对不同特征和相关测量方法的描述。

Applies to sound systems of any kind, and to the parts of which they are composed or which are used as auxiliaries to such systems. Deals with the determination of the performance of sound system equipment, the comparison of these types of equipment and the determination of their proper practical application, by listing the characteristics which are useful for their specification and laying down uniform methods of measurements for these characteristics. Is confined to a description of the different characteristics and the relevant methods of measurement.