本SAE推荐实践建立了测试程序、设施和仪器，用于确定通常安装在地面车辆、船舶、产品和飞机上以降低噪声水平的材料的降噪特性。 本文件旨在提供一种通过利用不一定满足ASTM E 90《建筑隔板空气传声损失的实验室测量》中所有声学要求的设施对材料进行分级排序的方法。在某些测试条件下允许宽容度，以便与使用中的声学结果更好地相关。

This SAE Recommended Practice establishes the test procedure, facilities, and instrumentation for determining the noise reduction characteristics of materials commonly installed in ground vehicles, marine, products, and aircraft to reduce noise levels. This document is intended to provide a means of rank ordering materials by utilizing facilities that do not necessarily meet all of the acoustical requirements in ASTM E 90, Laboratory Measurements of Airborne Sound Transmission Loss of Building Partitions. Latitude is permitted in certain test conditions to allow better correlation with in-use acoustical results.