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仿真可听化(SIM-AUR)

Features and Benefits

  • Simulate long time thermal behaviour
  • Auralization and analysis of arbitrary nonlinear effects
  • Calculates history of electrical, mechanical, acoustical and thermal state variables over time
  • Assess long time performance of the transducer in target applications
  • Exploit the main source of nonlinear distortion in the output signal
  • Evaluate the audible performance of the speak
  • Simulate transducer behaviour using arbitrary stimuli
  • Assess long-term performance of the transducer in target applications
  • Save time and costs in prototyping

SIM-AUR模块 对安装在普通腔体系统中的电动驱动单元进行数值模拟。与其他模块不同,施加的激励可以是任意长度的任意种类信号(例如测试信号、音乐等)。它使用扩展的集总参数模型来描述整个工作范围内的传输行为。计算出的电气、机械、声学和热状态变量可用于扩展分析。真实的或虚拟的驱动单元和系统数据都可以用作模拟的基础。另外,在不影响模拟换能器系统的情况下,可以分离出明显的非线性效应。将声输出信号中的失真从线性分量中分离出来是该新可听化技术的基础,在该技术中,可以执行双盲A/B比较,并系统地确定可听性阈值。此外,分离出的信号可供进一步分析。



Thermal Operation

快速模拟音圈和磁铁温度,同时重现5h的常用音乐资料。

This operation is used to calculate the long-term thermal response of the transducer. A time-lapse feature for fast calculation is available. Using the time-lapse technique, the long test state variables, such as the magnet and pole-tips temperature, are approximately determined and can be used for further operations. The “Thermal”-operation must be the first operation of the SIM-AUR module. Every further operation depends on the transducer model and stimulus defined in this operation.


Time Lapse Technique

要评估换能器的长时性能,必须进行耗时的测量或模拟。最长的时间常数出现在热系统中,这是磁铁结构缓慢加热的结果。换能器的音圈温度直接取决于功耗。由于与机电换能器相比,热变化相对较慢,因此可以通过预测功耗和有效状态变量来显著提高仿真速度。
最重要的目标是:

  • 对长时换能器性能进行快速热学评估
  • 利用强加热来达到关键工作条件

示例

由LSI模块识别的线性、非线性和热参数被导出到仿真可听化(SIM-AUR)模块。识别出的参数可以随意修改。任意音频文件形式的测试信号用作输入文件,并且可以进行虚拟放大(无削波仿真)。借助时延技术,可以快速识别输入信号的有趣部分,这些部分会提供高振幅和发热。

要研究非线性失真的影响,< i> SIM AUR 提供了一个简单的缩放窗口,可以更改线性信号和非线性失真(来自电机、悬挂非线性或腔体)之间的比率。聆听者可以使用高质量的耳机或扬声器监听系统来收听输出信号。这些信号也可以导出,并用作听音测试的基础。


Auralization

The new auralization technique is used to separate distinct nonlinear effects, such as effects due to nonlinear Bl, Le or Rms or other, without affecting the model state. This separation does not affect the speaker model itself. The separated effects can be used to determine the root cause of the nonlinear distortion. Also, the separated signal can be stored as a wave-file, gaining the possibility to easy design auditory experiments to evaluate the impact on audible quality.

The most important objectives are:  

  • Separation of nonlinear effects without affecting the modelled speaker
  • Exploit the main source of nonlinear distortion in the output signal
  • Design auditory experiments to evaluate the audible impact of the nonlinear distortion
  • Evaluate the audible performance of the speaker at the target application
  • Find optimal performance-cost ratio
  • Assess distortion ratio in audio signals

要求

Klippel Analyzer 3
UKEY USB加密狗
Klippel加密狗



标准

国际电工委员会
IEC 60268-13, IEC 62458

国际电信联盟
ITU-R BS. 1116,ITU-R BS. 1534-1


专利

美国:  8,964,996B2

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