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March 13, 2026The Journal of the Acoustical Society of America

Research on self-sensing impedance control method for adjustable low-frequency sound absorption

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Authors

SZShiqi ZhangXZXiaochen ZhaoSJSuyan Jing

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Overview

Research demonstrates effective low-frequency sound absorption using a self-sensing method, indicating significant acoustic performance improvements.

Key Points

  • This research aims to improve low-frequency sound absorption using a novel self-sensing impedance control method.
  • Proposed a self-sensing acoustic impedance control method without external sensors.
  • Utilized electromechanical coupling of a loudspeaker for sensing and actuation.
  • Established a lumped-parameter model to analyze controller and diaphragm interactions.
  • Adopted a finite impulse response filter as the control algorithm.
  • Conducted numerical simulations and experimental validation in an impedance tube.
  • Achieved absorption coefficients above 0.6 in the 150-300 Hz range.
  • The method effectively modifies effective mass and damping, shifting absorption peaks.
  • Higher-order FIR characteristics suppressed acoustic reactance for broadband absorption.

Cite This Study

Zhang et al. (2026) studied this question.

synapsesocial.com/papers/69b3acb202a1e69014cce964https://doi.org/10.1121/10.0043001
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