1.1本测试方法描述了一种测试程序，用于测量封闭房间、房间内发生的对话以及房间外潜在窃听者的语音隐私度。 1.2通过该方法测量的语音隐私度是由于房间结构的隔音 墙壁、地板、天花板和房间边界的任何其他元素 以及封闭房间外收听位置的背景噪音。 1.3假设潜在窃听者不受电子或电声设备的帮助，并且不接触房间边界。窃听的决心没有得到解决。 1.4该方法可适用于任何封闭房间，无论是否专门用于防止窃听。 1.5该方法没有为充分的语音隐私设定标准。非强制性附录提供了关于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设置标准的指南。 1.6以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本试验方法提供了一种测量封闭房间内部和房间外部位置之间隔声的方法，以及房间外部位置的背景噪声级。结果可用于评估语音隐私程度，或估计语音在每个接收点可理解或可听见的概率。 人们说话的音量不同，对房间噪音和其他声学因素的反应也不同。因此，不可能确切地说一个房间是否受到了窃听保护。我们只能指定被偷听的概率。考虑中的封闭房间的所有者或管理者必须根据其具体目标和情况设定该概率的标准。 非强制性附录提供了设置标准的方法。

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 the walls, floor, ceiling and any other elements of the room boundaries and to the background noise at listening positions outside the closed the 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 set criteria for adequate speech privacy. A non-mandatory appendix 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 set 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 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 the background noise levels at the locations outside the room. The results can be used to rate the degree of speech privacy, or to estimate the probability of speech being intelligible or audible at each receiving point. People speak at different levels and 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 gives an approach to setting criteria.