A nonlocal boundary control, from plane waves to spinning modes control.

Emanuele De Bono; Morvan Ouisse; Manuel Collet; Edouard Salze; Jacky Mardjono

doi:10.1117/12.2658382

28 April 2023 A nonlocal boundary control, from plane waves to spinning modes control.

Emanuele De Bono, Morvan Ouisse, Manuel Collet, Edouard Salze, Jacky Mardjono

Proceedings Volume 12483, Active and Passive Smart Structures and Integrated Systems XVII; 124831B (2023) https://doi.org/10.1117/12.2658382
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States

Abstract

This contribution focuses on innovative acoustic liner concepts for reducing noise transmission through acoustic waveguides. The technology employed to implement such innovative boundary treatments are electro-active acoustic absorbers making use of loudspeakers (as actuators) and microphones (as sensors). Its most ambitious application is in the nacelle of the new generation of Ultra-High-By-Pass-Ratio (UHBPR) turbofans. In particular, this work targets higher modal-order sound fields (such as the ones in the UHBPR in the frequencies of interest). A nonlocal boundary operator is presented to show the potentialities of programmable metasurfaces in overcoming the performances of classical liner technologies.

Conference Presentation

Citation Download Citation

Emanuele De Bono, Morvan Ouisse, Manuel Collet, Edouard Salze, and Jacky Mardjono "A nonlocal boundary control, from plane waves to spinning modes control.", Proc. SPIE 12483, Active and Passive Smart Structures and Integrated Systems XVII, 124831B (28 April 2023); https://doi.org/10.1117/12.2658382

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