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Broadband dissipation through Functionally-Graded Micro Perforated Metamaterials

Hierarchical metamaterials
bio-inspired sound absorption and transmission control
flow-induced noise
  • Proyecto
  • Resultados
  • Otros

The problem of lightweight and space-constrained sound absorbers in the low frequency range constitutes an area of continuous research. For instance, aeronautics has an important role to play in reducing noise to support sustainable traffic growth: one of the main challenges of air transport is to attenuate the environmental impact of air traffic despite its continuing expansion. Passive methods can provide significant noise reduction, but also additional weight and may obstruct fast routine maintenance inspection. They are also accompanied by some degradation in high-lift performance or are not practical for real-life applications when low frequency components are predominant. Although potential of active noise control in airframe noise reduction is promising, at present stage these active methods are applied in laboratory conditions and to downscaled models of airframe components. In this project we have improved low-frequency absorption of flow-induced noise through the development of acoustic meta-materials at sub-wavelength scales. We have combined thin micro-perforated structures periodically assembled across multiple length scales to obtain a lightweight sound-proof device. A comparison of the absorption coefficient for the proposed absorber (blue) and for a classical aircraft liner (red) is presented in the figure below for a total partition thickness of 10 cm.

 

Publicaciones
Año: 2021
Proceedings
Enhanced modal matching approach to efficiently predict the acoustical performance of macro- and micro-perforated partitions
Cedric Maury and Teresa Bravo
Proc. Mtgs. Acoust. 43, 022001 (2021)
https://doi.org/10.1121/2.0001429
GAA
Vibrational effects on the optimization of micro-perforated partitions based on a causality criterion
Teresa Bravo and Cedric Maury
Proc. Mtgs. Acoust. 43, 040001 (2021)
https://doi.org/10.1121/2.0001435
GAA
Regresar arriba
Congresos y reuniones, conferencias
2021
Experimental techniques for measuring sound absorption through micro-perforated partitions
Conferencia invitada

T. Bravo and C. Maury

Euronoise 2021.

E-congress celebrado del 25 al 27 de octubre de 2021.
 


Comunicación presentada (370.41 KB)
GAA
Enhanced modal matching method for perforated and micro-perforated partitions
Conferencia invitada

Maury and T. Bravo

50th International Congress and Exposition on Noise Control Engineering, INTERNOISE 2021

E-congress celebrado del 1 al 5 de agosto de 2021

GAA
Optimization of space-constrained micro-perforated absorbers by causality criteria
Conferencia invitada

Bravo and C. Maury

50th International Congress and Exposition on Noise Control Engineering, INTERNOISE 2021

E-congress celebrado del 1 al 5 de agosto de 2021.

GAA
Regresar arriba

Datos del proyecto

LINKB20009
Programa i-LINK (CSIC)
LINKB20009
Investigador principal
Teresa Bravo María
Otros participantes ITEFI
Carlos de la Colina Tejeda
Inicio: 01-01-2019 Finalización: 31-12-2021
GAA
Acoustics and Non Destructive Evaluation (DAEND)
  • Environmental Acoustics (GAA)
  • G Carma: Materials Characterization by Non Destructive Evaluation
  • ULAB, Ultrasounds for Liquid Analysis and Bioengineering
Information and Communication Technologies (TIC)
  • Cybersecurity and Privacy Protection Research Group (GiCP)
  • Research group on Cryptology and Information Security (GiCSI)
    • Quantum Communications Laboratory (LCQE)
  • Multichannel Ultrasonic Signal Processing Group (MUSP)
Sensors and Ultrasonic Systems (DSSU)
  • Ultrasonic Systems and Technologies (USTG)
  • Nanosensors and Smart Systems (NoySi)
  • Ultrasonic Resonators for cavitation and micromanipulation (RESULT)
  • Advanced Sensor Technology (SENSAVAN)
  • Quantum Electronics (QE)
Laboratorios
  • Laboratorio de Acústica
  • Laboratorio de Metrología Ultrasónica Médica (LMUM)
  • Laboratorio de Comunicaciones Cuánticas
  • Laboratory for International Collaboration in Advanced Biophotonics Imaging

Instituto de Tecnologías Físicas y de la Información Leonardo Torres Quevedo  - ITEFI
C/ Serrano, 144. 28006 - Madrid • Tel.: (+34) 91 561 88 06  Contacto  •  Intranet
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