• Spectrum analyzer with an arbitrary stimulus (e.g., music)
• Monitoring of time-variant and time-invariant linear transfer function
• Distortion separation (harmonic, intermodulation, rub & buzz)
• Listen to isolated distortion
• Applicable to any audio system and transducer
The Nonlinear Residual Analyzer (NRL) is a tool dedicated to measuring active or passive audio systems with music, speech, or any other test signal. Based on the monitored signals, the NRL determines the linear transfer function of the device under test adaptively and separates the linear response from distortion components (e.g., non-linear or Rub&Buzz). This combination of modern measurement and listening techniques (auralization) helps to understand and evaluate the sound quality of your audio product.

The NRL can be operated as a spectrum analyzer and beyond that, the transfer function between two signals is identified adaptively. That means, if the transfer function changes during the test, the modeling adjusts itself. This can be used to determine the long-term properties of loudspeaker systems.

Applications include the investigation of heating effects, the drift of transfer function, and durability tests.

In addition to the transfer function, the NRL will separate a residual signal from a measurement based on a linear modeled signal.

This residuum will contain all the nonlinear effects of the provided DUT and can be listened to. The residuum can also be amplified and added back to the linear modeled signal. Listening to this will provide an intuitive picture of how different nonlinear effects influence sound quality.

• 长时监测
• 有源和无源系统
• 评估热耗和老化
• 使用音乐信号进行失真测量
• 物理和感知评估

要评估正常操作条件下有源和无源音频系统的性能，可使用实时音频分析仪 (LAA)。它可以同时监测多达5个信号，并检查时间和频率数据。使用任意音频信号（如音乐或语音）以及专用的测试信号（多音、扫频信号、单音/双音），可以识别和分析关键应用。LAA可以监测端电压、输入电流、音圈位移以及声压输出。采用自适应建模，可以获取时变特性（例如热或粘弹性变化）以及隔离规则和不规则失真。因此，被监测的状态信号以及失真测量值的触发可帮助存储仅仅感兴趣的部分。此外，还可以对失真效应的影响和原因进行识别和可听化。

硬件
• KLIPPEL Analyzer 3 硬件

附件
• 功率放大器
• 激光（可选，用于位移监测）
• 麦克风（可选，用于声压监测）
• PC

多音测量 (MTON)

消费电子协会
CEA-CEB19, CEA-2006-A, CEA-2019, CEA-2031

国际电工委员会
IEC 60268-21, IEC 60268-22, IEC WD 63034

欧洲标准
BS EN 50332