1.1本指南涵盖了室外声级测量正式计划的编制。有文件记录的详细计划对于需要在多个位置进行长时间测量的主要环境噪声研究非常有用。本指南主要用于此类情况。许多简单的测量可以在没有大量事先计划或文件的情况下进行。建议定期进行此类测量的个人或组织根据本指南起草并使用一份简短的通用计划，但不要参考本指南。注1规划和计划文件的范围应与项目的预算和需求一致。在大型测量项目中，使用正式的测量计划可能会带来比准备计划更大的成本节约。 即使是最简单的测量，也可以制定正式的书面计划。然而，在小型项目中，编制正式计划的成本可能不具有成本效益。在这种情况下，计划文件可能仅限于包含在最终报告中。 1.1.1本指南阐述了室外声级测量的以下方面: 1.1.2使用数字统计分析系统进行室外声音测量的试验方法E 1503解决了正常情况下室外声级测量的列出方面。许多其他正式和非正式做法也解决了其中大多数问题。然而，有时需要偏离正常方法，以适应特殊情况或监管要求。 本指南提供了适用于特定情况的技术正确的选项，并提供了选择适当选项所需的信息。 1.1.3当计划获取单个声级数据测量集或多组数据以及相关支持数据的程序时，可使用本指南。 1.2使用本指南计划的测量包括但不限于以下内容: 1.2.1现场声环境的表征。 1.2.2声音输出随时间变化的特定声源的声发射特性。 1.2.3包括低频声（次声）的测量，因为它有时涉及驱动结构振动，从而转化为可听的内部声音。 1.2.4测量冲击声和具有显著音调内容的声音。 1.3以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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。

1.1 This guide covers the preparation of a formal plan for measurement of outdoor sound levels. A documented, detailed plan is highly desirable and useful for major environmental noise studies requiring measurements at several locations over a long period. This guide is intended primarily for use in such cases. Many simple measurements can be made without extensive prior planning or documentation. It is recommended that persons or organizations routinely performing such measurements draft and use a brief generic plan based on, but not referencing, this guide. Note 1The extent of planning and plan documentation should be consistent with the budget and needs of the project. In a large measurement program it is possible that use of a formal measurement plan could result in cost savings greater than the cost of preparing the plan. A formal documented plan can be prepared for even the simplest measurement. However, on a small project, the cost of preparation of a formal plan may not be cost effective. In such cases, plan documentation could be limited to inclusion in the final report. 1.1.1 This guide addresses the following aspects of outdoor sound level measurements: 1.1.2 Test Method E 1503 for Conducting Outdoor Sound Measurements Using a Digital Statistical Analysis System addresses listed aspects of outdoor sound level measurements for situations that are normally encountered. Many other formal and informal practices also address most of these issues. However, there is sometimes a need to depart from the normal methods in order to accommodate a special situation or a regulatory requirement. This guide provides options that are technically correct for specific situations, and provides the information needed for selecting appropriate options. 1.1.3 This guide may be used when planning a program for obtaining either a single measurement set of sound level data or multiple sets of data, as well as related supporting data. 1.2 Measurements that may be planned using this guide include, but are not limited, to the following: 1.2.1 Characterization of the acoustical environment of a site. 1.2.2 Characterization of the sound emissions of a specific sound source that exhibits a temporal variation in sound output. 1.2.3 Measurement of low-frequency sound (infra-sound) is included because it is sometimes implicated in driving structural vibration that translates to audible interior sound. 1.2.4 Measurement of impulsive sound and sound with significant tonal content. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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.