Expert diagnostic system for moving-coil loudspeakers using nonlinear modeling.

@article{Bai2009ExpertDS,
  title={Expert diagnostic system for moving-coil loudspeakers using nonlinear modeling.},
  author={Mingsian Robin Bai and Chau-Min Huang},
  journal={The Journal of the Acoustical Society of America},
  year={2009},
  volume={125 2},
  pages={
          819-30
        }
}
  • M. Bai, Chau-Min Huang
  • Published 4 February 2009
  • Physics
  • The Journal of the Acoustical Society of America
This work aims at the development of an expert diagnostic system for moving-coil loudspeakers. Special emphasis is placed on the defects resulting from loudspeaker nonlinearities. As a loudspeaker operates in the large signal domain, nonlinear distortions may arise and impair sound quality. Analysis of nonlinear responses can shed light on potential design faults of a loudspeaker. By exploiting this fact, this expert diagnostic system enables classification of design faults using a defect… 
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References

SHOWING 1-10 OF 35 REFERENCES
Measurement of loudspeaker parameters by inverse nonlinear control
Nonlinear loudspeaker models have been developed to predict and explain the generation of nonlinear distortions in the reproduced sound at large amplitudes. These models require additional nonlinear
Distortion Analyzer-A New Tool for Assessing and Improving Electrodynamic Transducer
The dominant nonlinear distortions in loudspeakers, headphones and other actuators are predictable and are closely related with the general principle, particular design, materials and assembling
Analysis of nonlinear behavior of loudspeakers using the instantaneous frequency
TLDR
A new method using the instantaneous frequency is introduced for describing and characterizing loudspeaker nonlinearities and will be useful for understanding the nonlinear behavior of loudspeakers.
Prediction of Speaker Performance at High Amplitudes
A new method is presented for the numerical simulation of the large signal performance of drivers and loudspeaker systems. The basis is an extended loudspeaker model considering the dominant
Loudspeaker Nonlinearities – Causes, Parameters, Symptoms
This paper addresses the relationship between nonlinear distortion measurements and nonlinearities which are the physical causes for signal distortion in loudspeakers, headphones, micro-speakers and
Diagnosis and Remedy of Nonlinearities in Electrodynamical Transducers
Abstract Nonlinear and thermal mechanisms in woofers, headphones, shakers and other actuators produce signal distortion and limit the acoustic output at high amplitudes. Large-signal parameters based
Nonlinear Modeling of the Heat Transfer in Loudspeakers
Traditional modeling describes the heat flow in loudspeakers by an equivalent circuit using integrators with different time constants. The parameters of the lumped elements are assumed to be
Dynamic Measurement and Interpretation of the Nonlinear Parameters of Electrodynamic Loudspeakers
An extended model of nonlinear loudspeaker distortion represents both closed- and vented-box systems. The nonlinear parameters, which vary with voice-coil displacement, are measured dynamically, and
Development of an on-line diagnosis system for rotor vibration via model-based intelligent inference
  • Bai, Hsiao, Tsai, Lin
  • Computer Science, Engineering
    The Journal of the Acoustical Society of America
  • 2000
TLDR
An on-line fault detection and isolation technique is proposed for the diagnosis of rotating machinery and experiments carried out indicate the potential of the proposed techniques in predictive maintenance.
Assessment of voice-coil peak displacement Xmax
The voice coil peak displacement Xmax is an important driver parameter for assessing the maximal acoustic output at low frequencies. The method defined in standard AES 2-1984 is based on a harmonic
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