平面材料和组件的空气声屏障性能的实验室测量

[中文适用范围]： 本SAE标准提出了一种测试程序，用于确定在代表性尺寸和声音入射条件下，常见于移动、工业和商业产品中的材料及材料复合层的空气声绝缘性能，以便更好地与实际使用中的声绝缘性能相关联。感兴趣的频率范围通常为100至10000 Hz 1/3倍频程中心频率。 该测试方法设计用于测试具有均匀横截面的平面样品，尽管在某些应用中，该方法可以扩展到评估成型零件、穿通件或其他组件以确定其声学特性。对于非平面零件或组件，其中传输声音在测试样品表面变化强烈，更合适的方法是ASTM E90（带有混响接收室）或ASTM E2249（使用消声或半消声接收室的强度方法）。 [外文原描述]： This SAE Standard presents a test procedure for determining the airborne sound insulation performance of materials and composite layers of materials commonly found in mobility, industrial, and commercial products under conditions of representative size and sound incidence so as to allow better correlation with in-use sound insulator performance. The frequency range of interest is typically 100 to 10000 Hz 1/3-octave band center frequencies.This test method is designed for testing flat samples with uniform cross section, although in some applications the methodology can be extended to evaluate formed parts, pass-throughs, or other assemblies to determine their acoustical properties. For non-flat parts or assemblies where transmitted sound varies strongly across the test sample surface, a more appropriate methodology would be ASTM E90 (with a reverberant receiving chamber) or ASTM E2249 (intensity method with an anechoic or hemi-anechoic receiving chamber).