BS EN IEC 60268-21:2018规定了适用于电声的声学测量方法 传感器和被动和主动声音系统，如扬声器、电视机、， 多媒体设备、个人便携式音频设备、汽车音响系统和 专业设备。被测设备（DUT）可以由电气组件组成 在被动执行器之前执行模拟和数字信号处理的部件 将电输入转换成声音输出信号。这 本文件仅描述了评估传感器传输行为的物理测量 在任意模拟或数字输入信号与任意频率的声学输出之间的DUT 指向系统的近场和远场。这包括在两个小范围内操作DUT 和大信号域。目标声边界条件的影响 在对声音进行物理评估时，也可以考虑应用（例如汽车内部） 系统本文件不评估患者的感知和认知评估 再现声音和感知声音质量的影响。交叉引用:IEC 60268-1ISO 3744CTA 2034-AEN ISO 3744IEC 60263ISO 3745HD 483。 1 S2ISO 3EN 61260-1IEC 61094-4CTA 2010-BEN ISO 3745EN 61094-4IEC 61260-1IEC 60268-2:1987EN ISO 3741:2010ISO 3741:2010HD 483.2 S2:1993IEC 62777ISO/IEC指南98-3GUM:1995EN 62777IEC 60268-7:2010EN 60268-7:2011购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS EN IEC 60268-21:2018 specifies an acoustical measurement method that applies to electroacoustical transducers and passive and active sound systems, such as loudspeakers, TV-sets, multi-media devices, personal portable audio devices, automotive sound systems and professional equipment. The device under test (DUT) can be comprised of electrical components performing analogue and digital signal processing prior to the passive actuators performing a transduction of the electrical input into an acoustical output signal. This document describes only physical measurements that assess the transfer behaviour of the DUT between an arbitrary analogue or digital input signal and the acoustical output at any point in the near and far field of the system. This includes operating the DUT in both the small and large signal domains. The influence of the acoustical boundary conditions of the target application (e.g. car interior) can also be considered in the physical evaluation of the sound system. This document does not assess the perception and cognitive evaluation of the reproduced sound and the impact of perceived sound quality.Cross References:IEC 60268-1ISO 3744CTA 2034-AEN ISO 3744IEC 60263ISO 3745HD 483.1 S2ISO 3EN 61260-1IEC 61094-4CTA 2010-BEN ISO 3745EN 61094-4IEC 61260-1IEC 60268-2:1987EN ISO 3741:2010ISO 3741:2010HD 483.2 S2:1993IEC 62777ISO/IEC Guide 98-3GUM:1995EN 62777IEC 60268-7:2010EN 60268-7:2011All current amendments available at time of purchase are included with the purchase of this document.