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# 音圈位移

KLIPPEL R&D系统KLIPPEL QC系统

LSI3, SPM, PWT,MSC

TRF, DIS, LPM, LSI3, PWT, SPM

MSC, DCX
Rub&Buzz分析TRF PROSPL, SPL-IMP

The figure to the left shows the amplitude of the voice coil displacement versus frequency. Below the resonance frequency, the nonlinearities of the transducer, such as the force factor Bl(x) and stiffness Kms(x), decrease the fundamental component below the value predicted by a linear model. The nonlinear compression can be measured by a laser sensor or predicted by using a large signal model and identified nonlinear parameters (SIM).

The figure to the left shows the positive and negative peak of the voice coil displacement for a terminal voltage which is increased in equal steps. For a sinusoidal stimulus of 10 Volts below the resonance frequency (fs= 50 Hz) the fundamental component is under compression and the displacement is 8 dB below the linearly predicted value. Above resonance asymmetries in the loudspeaker generate a dc component which shifts the voice coil by 2 mm to the negative side.

## KLIPPEL R&D系统 (开发)

TRF通过使用整形的激励信号（以10dB每倍频程增强至较高频），以足够信噪比SNR测量高频处的位移传递函数Hx(f)

LPM通过使用多音信号测量音圈位移，该多音信号有最好的信噪比，并且产生最小的非线性失真。这对于无扰动技术情况下进行T/S参数的可靠测量非常重要。

3D失真测量 (DIS)

DIS模组测量峰值、RMS值和直流位移与频率和输入电压之间的关系。

SCN可以提供音圈在圆周上平均的音圈位移平均值。

## KLIPPEL QC系统 (产线终端测试)

MSC测试任务通过使用导入的Bl(x=0)和测量的电压电流来预测音圈位移.

## KLIPPEL产品模板

DIS X Fundamental, DC

TRF H(f)= X/voltage

TRF rubb+buzz w/o Golden Unit

TRF rubb+buzz with Golden Unit

DIS Compliance Asymmetry AN 15

DIS Motor stability

LSI Tweeter Nonlin. Para Sp2

LSI Woofer Nonl. P. Sp1

LSI Woofer Nonl.+Therm. Sp1

LSI Woofer+Box Nonl. P Sp1

LSI Microspeaker Nonl. P. Sp2

SIM closed box analysis

SIM Compression Out(In)

SIM Motor Stability

SIM vented box analysis

SIM X Fundamental, DC

AUR auralization

Diagnost. MIDRANGE Sp1

Diagnost. RUB&BUZZ Sp1

Diagnost. RUB & BUZZ Sp2

Diagnost. SUBWOOFER (Sp1)

Diagnostics MICROSPEAKER Sp2

Diagnostics TWEETER (Sp2)

Diagnostics VENTED BOX SP1

Diagnostics WOOFER (Sp1)

Diagnostics WOOFER Sp1,2

## 标准

AES2 Recommended practice Specification of Loudspeaker Components Used in Professional Audio and Sound Reinforcement (AES2推荐的用于专业音频和声音增强的扬声器组件的实用规范)

## 论文和预印本

W. Klippel, et al., “Distributed Mechanical Parameters of Loudspeakers Part 1: Measurement,” J. of Audio Eng. Soc. 57, No. 9, pp. 500-511 (2009 Sept.).

W. Klippel, et al., “Distributed Mechanical Parameters of Loudspeakers Part 2: Diagnostics,” J. of Audio Eng. Soc. 57, No. 9, pp. 696-708 (2009 Sept.).

W. Klippel, “Assessment of Voice-Coil Peak Displacement Xmax,” J. of Audio Eng. Soc. 51, Heft 5, pp. 307 - 323 (2003 May).

R. H. Small, “Closed-Box Loudspeaker Systems, Part I: Analysis,” J. Audio Eng. Soc., Volume 20, pp. 798 – 808 (1972 Dec.).