1.1本试验方法包括使用数字统计声音分析系统和正式测量计划测量特定位置的室外声级。 1.1.1本试验方法提供了获取单组数据或多组相关数据的基本要求。然而，由于有许多情况和不同的目标需要多组数据，测试方法不涉及测量程序的规划。 1.2使用本试验方法进行的测量结果包括但不限于以下内容: 1.2.1描述现场的声学环境， 1.2.2表征特定声源的声发射，该声源在声音输出中表现出时间变化，以及 1.2.3监测噪音影响缓解计划的有效性。 1.3本试验方法拟与参考本试验方法的测量计划一起使用。计划中应明确说明对本试验方法规定的更改或增补。 1.3.1例如，由于时间限制，有必要在不首先正式制定计划的情况下进行测量，如果操作员/观察员的资质令执行机构和客户都满意，并且在测量过程中始终在场，并且尽可能符合要求，则可以使用本测试方法，符合本试验方法的所有适用要求，包括记录保存。 1.4使用本试验方法获得的数据能够将声级数据与适当标准进行比较。 1.4.1通过本试验方法获得的数据可用于推导响度水平，前提是在收集数据时观察到关于样本持续时间和信号带宽的必要要求。建议在制定测量计划时咨询响度评估领域的专家，以产生用于此目的的数据。 1.5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 test method covers the measurement of outdoor sound levels at specific locations using a digital statistical sound analysis system and a formal measurement plan. 1.1.1 This test method provides basic requirements for obtaining either a single set of data or multiple sets of related data. However, because there are numerous circumstances and varied objectives requiring multiple sets of data, the test method does not address planning of the measurement program. 1.2 The use of results of measurements performed using this test method include, but are not limited to, the following: 1.2.1 To characterize the acoustical environment of a site, 1.2.2 To characterize the sound emissions of a specific sound source which exhibits a temporal variation in sound output, and 1.2.3 To monitor the effectiveness of a noise impact mitigation plan. 1.3 This test method is intended to be used in conjunction with a measurement plan that references this test method. Changes or additions to the provisions of this test method shall be clearly stated in the plan. 1.3.1 In the event it is necessary, for example, because of time constraints, to conduct measurements without first formalizing a plan, this test method can be used if an operator/observer whose qualifications are satisfactory to both the performing organization and the client is present at all times during the measurements and who complies, to the extent possible, with all the applicable requirements of this test method, including record keeping. 1.4 The data obtained using this test method enable comparison of sound level data with appropriate criteria. 1.4.1 The data obtained with this test method can be used in the derivation of loudness levels provided the necessary requirements regarding sample duration and signal bandwidth are observed in collecting the data. It is recommended that a specialist in the area of loudness evaluation be consulted in preparing a plan for measurements intended to produce data which will be used for this purpose. 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided 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.