1.1 本试验方法涵盖了船舶舱壁、甲板和舷侧壳体上安装的处理装置的声学有效性的实验室测量。测量的重点是评估在应用治疗时发生的传输损耗、辐射效率和接受度的变化。吸收和阻尼变化的测量见 附录X1 和 附录X2 分别地 1.2 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。 1.3 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。 1.4 安装在海军部的任何材料必须符合适当的防火、可燃性和其他适用的SOLAS、USCG、IMO、海军或其他要求的非声学标准和规范。看见 附录X3 了解更多信息。 ====意义和用途====== 5.1 为了充分了解给定处理的效果，必须表征五个声学因素（传输损耗、接受度、辐射效率、吸收和阻尼）。 例如，仅知道给定处理对传输损耗的影响将不允许声学设计师或工程师评估其对振动传播的影响（以及其他影响），这是大型机械项目和螺旋桨激励的重要途径。 5.2 有必要对声学性能和测试程序进行通用定义，以确定船舶处理的所有五个声学因素，以便比较不同处理类型以及不同制造商的相同处理类型的性能。 5.3 在某些情况下，特别是对于阻尼处理，处理的效果将取决于非- 处理结构的材料和几何形状以及其他非声学因素，如环境条件（即温度）。为了充分表征处理，可能需要测试一系列基础结构。出于实用性、方便性或经济性的原因，仅测试一到三种结构就足以在一系列实际情况下了解材料性能。更多讨论见 附件A1 .

1.1 This test method covers the laboratory measurement of the acoustical effectiveness of treatments installed on ship bulkheads, decks, and side shells. Measurements are focused on assessing changes in transmission loss, radiation efficiency, and acceptance that occur when treatments are applied. Measurements of changes to absorption and damping are addressed in Appendix X1 and Appendix X2 , respectively. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. 1.4 Any material that is to be installed on a marine division must meet appropriate fire, combustibility, and other applicable SOLAS, USCG, IMO, Navy, or other required non-acoustical standards and specifications. See Appendix X3 for additional information. ====== Significance And Use ====== 5.1 To fully understand the effects of a given treatment, five acoustical factors (transmission loss, acceptance, radiation efficiency, absorption, and damping) must be characterized. For example, only knowing the effect of a given treatment on transmission loss will not allow the acoustical designer or engineer to assess its impacts on propagation of vibration (among other effects), which is an important path to consider for large machinery items and propeller excitation. 5.2 It is necessary to have a common definition of acoustical performance and test procedure to determine all five acoustical factors for ship’s treatments so that the performance of different treatment types, as well as the same treatment type from different manufacturers, can be compared. 5.3 In some cases, particularly for damping treatments, the effect of the treatment will be dependent on the non-treated structure’s material and geometry and other non-acoustic factors such as environmental conditions (that is, temperature). To fully characterize a treatment it may be necessary to test a range of base constructions. For reasons of practicality, convenience, or economy, it may be sufficient to test only one to three constructions to achieve an understanding of the material performance in a range of practical situations. Additional discussion is provided in Annex A1 .