Analysis and Identification of Nonlinear Acoustic Damping in Miniature Loudspeakers
| Autor: | Yong Shen, Ke-Yu Pan, Jie Huang, Xuelei Feng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Technology
QH301-705.5 QC1-999 Acoustics nonlinear acoustic damping General Materials Science Biology (General) QD1-999 Instrumentation Fluid Flow and Transfer Processes Physics Measurement method Nonlinear system identification Process Chemistry and Technology General Engineering Engineering (General). Civil engineering (General) Physics::Classical Physics Computer Science Applications miniature loudspeaker Chemistry Identification (information) Nonlinear system Amplitude equivalent circuit model Computer Science::Sound Equivalent circuit nonlinear system identification Loudspeaker TA1-2040 Acoustic impedance |
| Zdroj: | Applied Sciences Volume 11 Issue 16 Applied Sciences, Vol 11, Iss 7713, p 7713 (2021) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app11167713 |
| Popis: | Nonlinear acoustic damping is a key nonlinearity in miniature loudspeakers when the air velocity is at a high amplitude. Measurement of nonlinear acoustic damping is beneficial for predicting and analyzing the performance of miniature loudspeakers. However, the general measuring methods for acoustic impedance, such as the standing-wave tube method or the impedance tube method, are not applicable in this scenario because the nonlinear acoustic damping in miniature loudspeakers is coupled with other system nonlinearities. In this study, a measurement method based on nonlinear system identification was constructed to address this issue. The nonlinear acoustic damping was first theoretically analyzed and then coupled in an equivalent circuit model (ECM) to describe the full dynamics of miniature loudspeakers. Based on the ECM model, the nonlinear acoustic damping was identified using measured electrical data and compared with theoretical calculations. The satisfactory agreement between the identification and theoretical calculations confirms the validity of the proposed identification method. |
| Databáze: | OpenAIRE |
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