000217470 001__ 217470
000217470 005__ 20190507143827.0
000217470 0247_ $$2doi$$a10.1109/TCST.2016.2547981
000217470 022__ $$a1558-0865
000217470 02470 $$2ISI$$a000391498700007
000217470 037__ $$aARTICLE
000217470 245__ $$aBroadband Low-Frequency Electroacoustic Absorbers Through Hybrid Sensor-/Shunt-Based Impedance Control
000217470 260__ $$bInstitute of Electrical and Electronics Engineers$$c2017$$aPiscataway
000217470 269__ $$a2017
000217470 300__ $$a10
000217470 336__ $$aJournal Articles
000217470 520__ $$aThis paper proposes a hybrid impedance control architecture for an electroacoustic absorber, that combines an improved microphone-based feedforward control with a currentdriven electrodynamic loudspeaker system. Feedforward control architecture enables stable control to be achieved, and current driving method discards the effect of the voice coil inductance. A method is given for designing the transfer function to be implemented in the controller, according to a target specific acoustic impedance and mechanical parameters of the transducer. Numerical simulations present the expected acoustic performance, introducing global performance indicators such as the bandwidth of efficient absorption. Experimental assessments in a waveguide confirmed the accuracy of the model and the efficiency of the hybrid control technique for achieving broadband, stable lowfrequency electroacoustic absorbers. An application to damping of resonances in a duct is also presented, and the application to the modal equalization in actual listening rooms is finally discussed.
000217470 6531_ $$aElectrodynamic loudspeaker
000217470 6531_ $$apressure control
000217470 6531_ $$aresonances damping
000217470 6531_ $$amodal equalization
000217470 6531_ $$aactive sound absorption
000217470 700__ $$g195222$$0246640$$aRivet, Etienne
000217470 700__ $$aKarkar, Sami
000217470 700__ $$aLissek, Herve
000217470 773__ $$j25$$tIEEE Transactions on Control Systems Technology$$k1$$q63-72
000217470 8564_ $$uhttps://infoscience.epfl.ch/record/217470/files/2017%20Rivet%20Karkar%20Lissek%20-%20Broadband%20low-frequency%20electroacoustic%20absorbers%20through%20hybrid%20sensor-_shunt-based%20impedance%20control%20-%20postprint.pdf$$zn/a$$s3403747$$yn/a
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000217470 937__ $$aEPFL-ARTICLE-217470
000217470 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000217470 980__ $$aARTICLE