修订标准-撤销。 本标准中的许多定义适用于电子管以外的设备，尤其是半导体设备。这些定义尽可能笼统，但在解释这些定义时，应始终记住，它们主要是为电子管编写的。IEEE Std 161-1971由IEEE Std 160-1957组成，其中部分内容由澄清的定义修订 IEEE Std 161-1962中“噪声系数”和“噪声温度”的定义。

Revision Standard - Inactive-Withdrawn. Many definitions in this standard are applicable to devices other than electron tubes — especially semiconductor devices. These definitions have been made as general as possible, but it should always be remembered, in interpreting these definitions that they are primarily written for electron tubes. IEEE Std 161-1971, consists of IEEE Std 160-1957 as revised in part by the clarified definitions of "noise factor" and "noise temperature" in IEEE Std 161-1962.