1.1 本规程的定义和程序适用于从中等大小的数据集计算任何介质中任何刺激的单个阈值，即每个个体包含20到40个以上的3-AFC呈现。可以使用5到15个单独阈值来计算组阈值。 1.2 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、健康和环境实践，并确定监管限制的适用性。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 6.1 感官阈值用于确定低浓度物质向某种物质传递气味、味道、皮肤感觉等的潜力。 6.2 例如，阈值用于设定空气污染、噪音消除、水处理和食品系统的限制。 6.3 阈值用于表征和比较个人或群体对给定刺激的敏感性，例如在医学、种族研究和动物物种研究中。

1.1 The definitions and procedures of this practice apply to the calculation of individual thresholds for any stimulus in any medium, from data sets of intermediate size, that is, consisting of more than 20 to 40 3-AFC presentations per individual. A group threshold may be calculated using 5 to 15 individual thresholds. 1.2 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. 1.3 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 ====== 6.1 Sensory thresholds are used to determine the potential of substances at low concentrations to impart odor, taste, skinfeel, etc. to some form of matter. 6.2 Thresholds are used, for example, in setting limits in air pollution, in noise abatement, in water treatment, and in food systems. 6.3 Thresholds are used to characterize and compare the sensitivity of individuals or groups to given stimuli, for example, in medicine, ethnic studies, and the study of animal species.