Search Results - "do N. Almeida, Gildean"

Acoustic analysis of a metasurface for normal and random incidence sound waves by do N. Almeida, Gildean, Vergara, Erasmo F., Barbosa, Leandro R., Lenzi, Arcanjo, Mareze, Paulo H., Birch, Robert S.

Get full text

Low-frequency acoustic attenuator based on a labyrinthine Helmholtz resonator by Beck, Augusto B., Almeida, Gildean do N., Mikulski, Robson Z., Vergara, Erasmo F.

“…Low-frequency noise attenuation is a challenge in different engineering applications. This study investigates the effectiveness of a labyrinth-type Helmholtz…”
Get full text

Sound absorption metasurface with symmetrical coiled spaces and micro slit of variable depth by N. Almeida, Gildean do, Vergara, Erasmo F., Barbosa, Leandro R., Lenzi, Arcanjo, Birch, Robert S.

“…An acoustic metasurface (AMS) is proposed comprising a panel containing a micro slit of variable depth coupled to a thin cavity of symmetrical coiled spaces…”
Get full text

Sound absorption performance of a labyrinthine metamaterial with arbitrary cross-sectional microperforations by Almeida, Gildean do N., Vergara, Erasmo F., Barbosa, Leandro R., Lenzi, Arcanjo, Cassettari, Iago, Mikulski, Robson Z.

“…Studies on acoustic metamaterials (AMM) with coiled spaces as a solution for low-medium frequency sound absorption are regularly presented. However, the…”
Get full text

A low-frequency sound absorber based on micro-slit and coiled cavity by Almeida, Gildean do N., Vergara, Erasmo F., Barbosa, Leandro R., Lenzi, Arcanjo, Birch, Robert S.

“…The design of a compact low-frequency acoustic absorber whose thickness is less than the operating frequency wavelength is a difficult challenge. However,…”
Get full text

Low-frequency sound absorption of a metamaterial with symmetrical-coiled-up spaces by Almeida, Gildean do N., Vergara, Erasmo F., Barbosa, Leandro R., Brum, Ricardo

“…A theoretical, numerical and experimental investigation of a low-frequency acoustic absorber (100–600 Hz) is reported herein. The acoustic metamaterial is…”
Get full text

On the use of metamaterials with negative effective parameters for dual sound energy control by Almeida, Gildean do N., Vergara, Erasmo F., Barbosa, Leandro R., Lenzi, Arcanjo, Silva, Olavo M.

“…This study investigates the comprehensive control of sound energy through a acoustic metamaterial. The unit cell is composed of a main waveguide periodically…”
Get full text