声学

[中文适用范围]： 本文件规定了测量小型空气移动装置 (AMD) 发出的空气噪声的方法，例如用于冷却电子、电气和机械设备的装置，其中 AMD 的声功率级是值得关注的。这些 AMD 的示例包括螺旋桨风扇、管轴风扇、叶片轴风扇、离心风扇、机动叶轮及其变体。本文件描述了用于确定小型 AMD 发出的空气噪声的测试设备和方法，该噪声与 AMD 在测试设备上产生的体积流量和风扇静压有关。它旨在供 AMD 制造商、使用 AMD 冷却电子设备和类似应用的制造商以及测试实验室使用。它为 AMD 制造商、设备制造商和测试实验室提供了一种获得可比结果的方法。根据本文件进行的测量结果预计将用于工程信息和性能验证，并且这些方法可以在买卖双方之间的采购规范和合同中引用。测量的最终目的是提供数据以协助包含一个或多个 AMD 的电子、电气或机械设备的设计人员。根据实验数据，给出了一种计算本文件适用的缩放集气室最大体积流量的方法。 [外文原描述]： This document specifies methods for measuring the airborne noise emitted by small air-moving devices (AMDs), such as those used for cooling electronic, electrical, and mechanical equipment where the sound power level of the AMD is of interest. Examples of these AMDs include propeller fans, tube-axial fans, vane-axial fans, centrifugal fans, motorized impellers, and their variations. This document describes the test apparatus and methods for determining the airborne noise emitted by small AMDs as a function of the volume flow rate and the fan static pressure developed by the AMD on the test apparatus. It is intended for use by AMD manufacturers, by manufacturers who use AMDs for cooling electronic equipment and similar applications, and by testing laboratories. It provides a method for AMD manufacturers, equipment manufacturers and testing laboratories to obtain comparable results. Results of measurements made in accordance with this document are expected to be used for engineering information and performance verification, and the methods can be cited in purchase specifications and contracts between buyers and sellers. The ultimate purpose of the measurements is to provide data to assist the designers of electronic, electrical or mechanical equipment which contains one or more AMDs. Based on experimental data, a method is given for calculating the maximum volume flow rate of the scaled plenum up to which this document is applicable.