【英文标准名称】:Procedureofmeasurementsfortheelectromagneticcompatibility;measurementofconductedinterferenceunitsVDESpecification
【原文标准名称】:电磁兼容性的测量程序.传导干扰装置的测定.规范
【标准号】:DINVDE0847-1-1981
【标准状态】:现行
【国别】:德国
【发布日期】:1981-11
【实施或试行日期】:1981-11-00
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:示波器;输入阻抗;电子工程;安全工程;频率;定义;电磁学;频带宽度;电气工程;测量;磁学
【英文主题词】:measurement;electromagnetism;electricalengineering;frequencies;bandwidths;safetyengineering;inputimpedance;oscilloscopes;magnetism;electronicengineering;definitions
【摘要】:
【中国标准分类号】:L86;L06
【国际标准分类号】:33_100_10
【页数】:15P;A4
【正文语种】:德语


Product Code:SAE J1400
Title:Laboratory Measurement of the Airborne Sound Barrier Performance of Flat Materials and Assemblies
Issuing Committee:Acoustical Materials Committee
Scope:This SAE Recommended Practice presents a test procedure for determining the airborne sound barrier performance of materials and composite assemblies commonly installed in surface vehicles and marine products.This document is intended to provide a means of rank ordering barrier materials according to their sound transmission loss. At each test frequency the transmission loss (TL) is projected from the measured noise reduction of the test specimen using a correlation factor (CF). The respective CF for the test condition is determined as the differences between the measured noise reduction (MNR) of a homogeneous limp panel, such as lead, and its calculated field-incidence transmission loss. Latitude is permitted in certain test conditions that do not necessarily conform to all of the acoustical requirements of ASTM E 90. This method facilitates the evaluation of automotive materials and assemblies under conditions of representative size, edge constraint, and sound incidence so as to allow better correlation with in-use barrier performance.