1.1 该测试方法描述了一种测试程序，用于测量由封闭房间提供的语音隐私程度，用于在房间内发生的对话以及与位于房间外的潜在窃听者的对话。 1.2 通过这种方法测量的语音隐私程度是由于房间结构的隔音——包括墙壁、地板、天花板和房间边界的任何其他元素——以及封闭房间之外的收听位置（接收点）的背景噪音。 1.3 假设潜在的窃听者没有电子或电声设备的帮助，并且不接触房间边界。没有解决窃听的决心。 1.4 该方法可以应用于任何封闭的房间，无论是否特别旨在防止窃听。1.5 该方法不推荐足够语音隐私的标准。a非强制性 附录X2 就如何使用该测试方法的结果来估计窃听者能够理解封闭房间外语音的概率以及如何为此类房间建立标准提供指导。 1.6 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.7 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.8 本国际标准是根据国际公认的标准化原则制定的，该原则载于世界贸易组织技术性贸易壁垒委员会。 ======意义和用途====== 5.1 该测试方法提供了一种测量封闭房间内部和房间外部位置之间的声音隔离的方法，也用于测量房间外部位置的背景噪声水平。结果可用于通过估计语音在每个接收点可听或可懂的概率来评定语音隐私程度，如信息性 附录X2 . 5.2 人们以不同的音量说话，并且还会根据房间噪音和其他声学因素改变他们的音量。因此，不可能确切地说一个房间是否受到保护免受窃听。一个人只能分配被偷听的概率。所考虑的封闭房间的所有者或管理者必须根据他们的具体目标和情况为这种概率设定标准。非强制性 附录X2 给出了设置标准的方法。

1.1 This test method describes a test procedure for measuring the degree of speech privacy provided by a closed room, for conversations occurring within the room, and with potential eavesdroppers located outside the room. 1.2 The degree of speech privacy measured by this method is that due to the sound insulation of the room structure—including the walls, floor, ceiling and any other elements of the room boundaries—and to the background noise at listening positions (receiving points) outside the closed room. 1.3 Potential eavesdroppers are assumed to be unaided by electronic or electroacoustic equipment, and not touching the room boundaries. Determined efforts to eavesdrop are not addressed. 1.4 The method may be applied to any enclosed room, whether specifically intended to be protected against eavesdropping or not. 1.5 The method does not recommend criteria for adequate speech privacy. A non-mandatory Appendix X2 provides guidance on how the results of this test method may be used to estimate the probability of an eavesdropper being able to understand speech outside a closed room, and how to establish criteria for such rooms. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This test method provides a means of measuring the sound isolation between the interior of a closed room and locations outside the room, and also for measuring the background noise levels at the locations outside the room. The results can be used to rate the degree of speech privacy by estimating the probability of speech being audible or intelligible at each receiving point as discussed in the informative Appendix X2 . 5.2 People speak at different voice levels and also vary their voice level in reaction to room noise and other acoustical factors. Consequently, it is not possible to say definitely whether a room is protected against eavesdropping. One can only assign a probability of being overheard. The owners or managers of the closed room under consideration must set criteria for this probability according to their specific goals and circumstances. The non-mandatory Appendix X2 gives an approach to setting criteria.