Optimum control of broadband noise by arrays of cylindrical units made of a recycled material

́a-Chocano, Victor M. Garcı; Sánchez‐Dehesa, José

doi:10.1016/j.apacoust.2012.06.008

Cited by 23 publications

(18 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Their work was, however, a small-scale study in the laboratory. Their pioneering work brought forth a new field of research in various disciplines such as transformation optics [Jiang et al, 2009;Kinsler and McCall, 2015;Lu et al, 2009] energy harvesting , noise barriers [Garcia-Chocano et al, 2012;Garcia-Chocano and Sanchez-Dehesa, 2013;Ho et al, 2003;Lagarrigue et al, 2013;Sanchez-Dehesa et al, 2011] and vibration/shock mitigation [Akl and Baz, 2012;Baravelli and Ruzzene, 2013;Huang and Sun, 2010;Kim et al, 2015;Pai et al, 2014;Peng and Pai, 2014;Reynolds and Daley, 2014;Sharma and Sun, 2015;Tan et al, 2012]. The consideration of using AMs specifically for cavity noise control has been reported recently in two separate works.…”

Section: The Emergence Of Acoustic Metamaterialsmentioning

confidence: 99%

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Ang

Koh²,

Lee

2016

Int. J. Appl. Mechanics

View full text Add to dashboard Cite

The aim of this paper is to provide an overview of the existing industrial practices used for cabin noise control in various industries such as automotive, marine, aerospace, and defense. However, emphasis is placed on automobiles and armored vehicles. Generally, automobile cabins usually constitute of thin structural panels, where the fundamental frequency typically falls below 200[Formula: see text]Hz. If a specific structural mode couples with a specific acoustic mode of the cabin, booming noise occurs. As such, discomfort may be felt by the occupants. Fundamentally, vibroacoustics problems may be minimized if the acoustic modes and the structural modes are decoupled, which is achieved usually by structural modifications or acoustical treatments. However, if excessively performed, the weight limitation of an automobile design will be exceeded; not to mention the adverse effect of increased weight on several factors such as fuel efficiency, mileage life of tires and acceleration of the vehicle. Moreover, current solutions have several drawbacks in low frequency noise control. In light of this, it is of great interest to explore the feasibility of acoustic metamaterials as an alternative with hope to improve cabin noise.

show abstract

Section: The Emergence Of Acoustic Metamaterialsmentioning

confidence: 99%

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Ang

Koh²,

Lee

2016

Int. J. Appl. Mechanics

View full text Add to dashboard Cite

show abstract

“…Experimental data show that a periodic arrangement of metallic cylinders in air provides sound attenuation of up to 25 dB [3,10,11,12,13,14], which could compete with traditional noise barriers. At band gap frequencies, simultaneous low transmittance and high reflectance are expected due to Bragg scattering.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, additional physical mechanisms should be involved in order to achieve broadband attenuation. In that sense, the use of absorbing material covering the scatterers and local resonant phenomena have been recently proposed [14,15,16,17,18,19]. In this way, it is possible to obtain barriers whose frequency-dependent attenuation is more uniform and, in some cases, to enhance their overall performance.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the reported research on the characterisation of SCs, both in laboratory environments [4,5,12,13,14,15,16,17,18,19] and in situ [2,10], has employed non-standardised measurement techniques, where neither diffraction nor unwanted reflections were excluded. This means that the measured attenuation values should be considered as indicative rather than precise.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sound Insulation and Reflection Properties of Sonic Crystal Barrier Based on Micro-Perforated Cylinders

et al. 2019

Self Cite

View full text Add to dashboard Cite

A sonic crystal barrier, consisting of empty micro-perforated cylindrical shells, was built on the campus at the Universitat Politècnica de València in 2011 and characterised by using a non-standardised measurement technique. In this paper, the sonic crystal barrier, upgraded with rubber crumb inside the micro-perforated cylindrical shells, was characterised by using standardised measurement techniques according to EN 1793-5 and EN 1793-6. As a result of the characterisation, sound insulation properties of the barrier were shown to be a combination of the absorptive properties of the individual building units and the reflective properties of their periodic distribution. In addition, its performance was compared with a similar barrier consisting of rigid polyvinyl chloride (PVC) cylinders, which was recently characterised using the same standardised techniques. In comparison with the barrier based on PVC cylinders, the barrier investigated here produced a broadband enhancement of the sound insulation and lower reflection indices in the targeted frequency range. It was also shown that the influence of leakage under the barrier and the width of the temporal window on sound insulation was negligible. While EN 1793-5 and 1793-6 allow a direct comparison of the performance of different noise barriers, the applicability to this new type of barriers requires further investigation.

show abstract

“…In addition, the use of porous materials in the cylindrical scatterers has proven the enhancement of the attenuation of SC-based barriers due to their absorptive properties. [7][8][9] On the other hand, Maa 10,11 introduced the concept of microperforated panels (MPPs) to design structures with excellent absorbing properties. A MPP consists of a plate with a distribution of submillimetrical perforations backed by an air cavity and a rigid wall.…”

mentioning

confidence: 99%

Broadband sound absorption by lattices of microperforated cylindrical shells

García-Chocano

García

Sánchez‐Dehesa

2012

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

Absorption of broadband noise by sonic crystals consisting of microperforated cylindrical shells is proposed and experimentally demonstrated. The theoretical study has been performed in the framework of multiple scattering method, where a model for the T matrix of the microperforated shells has been developed. It has been predicted an extraordinary broadband sound absorption that is explained in terms of the multiple scattering phenomena occurring at the surfaces of the absorptive units—the microperforated panels. Our proposal has been supported by experiments performed on a structure consisting of 3 rows of cylindrical shells 3 meters height.

show abstract

Optimum control of broadband noise by arrays of cylindrical units made of a recycled material

Cited by 23 publications

References 25 publications

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Acoustic Metamaterials: A Potential for Cabin Noise Control in Automobiles and Armored Vehicles

Sound Insulation and Reflection Properties of Sonic Crystal Barrier Based on Micro-Perforated Cylinders

Broadband sound absorption by lattices of microperforated cylindrical shells

Contact Info

Product

Resources

About