Absorption characteristics of multi-layered material anechoic coating on frustum-of-a-cone cavities

Liu, Guoqiang; Lou, Jingjun; Li, Haitao

doi:10.1051/matecconf/20167708002

Cited by 4 publications

(3 citation statements)

References 2 publications

(1 reference statement)

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“…A finite element model with the frustum cavity (as shown in Figure 4f) was constructed by using COMSOL software. The results showed the superior absorption properties of the multilayered structure, and the sound absorption performance of the frustum cavity was better than that of the cylindrical and ellipsoidal cavities [21].…”

Section: Local Design Of Acoustic Coatingsmentioning

confidence: 99%

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From Local Structure to Overall Performance: An Overview on the Design of an Acoustic Coating

et al. 2019

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Based on the requirements of underwater acoustic stealth, the classification and research background of acoustic coatings are introduced herein. The research significance of acoustic coatings is expounded from the perspective of both the military and civilian use. A brief overview of the conventional design process of acoustic coatings is presented, which describes the substrates used in different countries. Aimed at the local design of acoustic coatings, research progress on passive and semi-active/active sound absorption structure is summarized. Focused on the passive acoustic coatings; acoustic cavity design and optimization, acoustic performance of acoustic coatings with rigid inclusions or scatterers, and acoustic coatings with a hybrid structure are discussed. Moreover, an overview of the overall design of acoustic coatings based on the sound field characteristics of the submarine is also presented. Finally, the shortcomings of the research are discussed, breakthroughs in acoustic coating design research are forecast, and the key technical issues to be solved are highlighted.

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Section: Local Design Of Acoustic Coatingsmentioning

confidence: 99%

“…( e ) Cross-section of the absorbent coating, including a cone frustum hole [20]. ( f ) Two-dimensional axisymmetric model [21]. ( g ) Sketch of the optimization area for the cavity, initial cavity, optimized cavity, and radiated sound power associated with different coatings attached to an infinite plate [22].…”

Section: Figurementioning

confidence: 99%

From Local Structure to Overall Performance: An Overview on the Design of an Acoustic Coating

et al. 2019

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“…The anechoic layer exhibits excellent sound absorption properties; however, it works well only in a specific frequency band, depending on the pore shape. In addition, to increase the sound absorption bandwidth using anechoic coatings, different pore sizes must be designed [ 11 , 12 , 13 ]. In a study based on a viscoelastic material, a certain method was adopted to increase the sound absorption performance according to the material of the inner core and angle of the ellipsoidal.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of an Active Reflection Controller That Can Reduce Acoustic Signal Refer to the Angle of Incidence

Pyun

Park

Kim

et al. 2021

Sensors

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Techniques for reducing the reflection of acoustic signals have recently been actively studied. Most methods for reducing acoustic signals were studied using the normal-incidence wave reduction technique. Although the technique of canceling an object from the normal incidence wave is essential, research on reducing acoustic signals according to the angle of incidence is required for practical applications. In this study, we designed, fabricated, and experimented with an active reflection controller that can reduce acoustic signals according to the angle of incidence. The controller consists of a transmitter on one layer, a receiver sensor on two layers, and an acoustic window on three layers. To reduce the reflected signal, a combination of the time delay and phase was applied to the controller to minimize the acoustic signal by up to −23 dB at an angle of 10°. A controller array simulation was performed based on the results of a controlled experiment. In conclusion, our proposed controller can reduce acoustic signals according to the angle of incidence, which makes it suitable for many applications.

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A new fabrication method of designed metamaterial based on a 3D-printed structure for underwater sound absorption applications

Baena

Wang

et al. 2023

Applied Acoustics

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Absorption characteristics of multi-layered material anechoic coating on frustum-of-a-cone cavities

Cited by 4 publications

References 2 publications

From Local Structure to Overall Performance: An Overview on the Design of an Acoustic Coating

From Local Structure to Overall Performance: An Overview on the Design of an Acoustic Coating

Design and Analysis of an Active Reflection Controller That Can Reduce Acoustic Signal Refer to the Angle of Incidence

A new fabrication method of designed metamaterial based on a 3D-printed structure for underwater sound absorption applications

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