Real-time-controlled artificial quiet channel for acoustic cloaking under varying detection conditions

Or Lasri, Lea Sirota

Research output: Contribution to journalArticlepeer-review


We consider the problem of hiding non-stationary objects from acoustic detection in a two-dimensional environment, where both the object's impedance and the properties of the detection signal may vary during operation. The detection signal is assumed to be an acoustic beam created by an array of emitters, which scans the area at different angles and different frequencies. We propose an active control-based solution that creates an effective moving dead zone around the object, and results in an artificial quiet channel for the object to pass through undetected. The control principle is based on mid-domain generation of near uni-directional beams using only monopole actuators. Based on real-time response prediction, these beams open and close the dead zone with a minimal perturbation backwards, which is crucial due to detector observers being located on both sides of the object's route. The back action wave determines the cloak efficiency, and is traded-off with the control effort; the higher is the effort the quieter is the cloaking channel. We validate our control algorithm via numerical simulations in a two-dimensional acoustic waveguide, testing variation in frequency and incidence angle of the detection source. Our cloak successfully intercepts the source by steering the control beams and adjusting their wavelength accordingly.

Original languageEnglish
Article number110501
JournalMechanical Systems and Signal Processing
StatePublished - 1 Oct 2023


  • Active acoustic cloaking
  • Active wave control
  • Unidirectional beam generation

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications


Dive into the research topics of 'Real-time-controlled artificial quiet channel for acoustic cloaking under varying detection conditions'. Together they form a unique fingerprint.

Cite this