Underwater acoustic metamaterials

ONR NURP: Acoustic Metamaterials for Undersea Applications

... underwater and to test the response of these materials for either vibrationor acoustic absorption in the underwater environment. Status, Active. Effective ...

Acoustic metamaterial - Wikipedia

An acoustic metamaterial, sonic crystal, or phononic crystal is a material designed to control, direct, and manipulate sound waves or phonons in gases, ...

Application of Acoustic Metamaterials in Underwater Airfoil Structure

However, acoustic metamaterials are rarely applied underwater. In this paper, an acoustic metamaterial structure with size far smaller than ...

Making the perfect sound absorbers using metamaterials

... acoustic metamaterials that absorbed the broadest ... metamaterials made of mosaic pieces, to better match the impedance of water. “Underwater acoustics ...

Underwater metamaterial absorber with impedance-matched ... - arXiv

An underwater acoustic absorber exhibiting high absorption from 4 to 20 kHz, measured in a 5.6m times 3.6m water pool with the time-domain approach.

PhD: Hydroacoustic Metamaterials for Focusing and Filtering of ...

This PhD project is concerned with the generation, transmission, and reception of sound in the underwater environment

Underwater acoustic absorbing metamaterials by material-structure ...

Underwater acoustic absorbing metamaterials by material-structure-functionality collaborative optimization · Huiqiang Wang · Zixian Cui · Xudong He · Zhiwen Ren ...

Acoustic and elastic waves in metamaterials for underwater ...

OF THE DISSERTATION Acoustic and Elastic Waves in Metamaterials for Underwater Applications by ALEXEY S. TITOVICH Dissertation Director: Professor Andrew N.

An ultra-thin underwater acoustic absorbing metamaterial by inverse ...

practical application of underwater acoustic metamaterials. Keywords: Acoustic metamaterials; Inverse design; Underwater sound absorption; Topology optimization ...

Anisotropic acoustic metafluid for underwater operation

Transformation acoustics1–3 and metamaterials that behave acoustically as fluids provide significant control over the propagation of sound,4–29 ...

Topology optimization of chiral metamaterials with application to ...

This work extends the applications of chiral metamaterials to underwater sound insulation. Various chiral metamaterials with low acoustic ...

A review of piezoelectric metamaterials for underwater equipment

Piezoelectric metamaterial is widely used in underwater equipment instead of traditional materials because the traditional materials can not meet the ...

Acoustic metamaterials for underwater sound attenuation - IIT Madras

This work discusses a bandwidth-limited passive noise control system enabled by an acoustic superscatterer, a type of metamaterial, to suppress the far-field ...

Thermo-visco-acoustic metamaterials for underwater applications

The ability to control underwater noise has been of practical interest for decades. Such noise, radiating from e.g. offshore wind farms, turbines, ...

Multifunctional Integrated Underwater Sound Absorption Materials

In this comprehensive review, we systematically analyze and categorize the mechanisms governing underwater sound absorption, hydrostatic pressure resistance, ...

Applications of Acoustic metamaterials - LinkedIn

Underwater Acoustics: Metamaterials can be tailored for underwater applications, such as improving sonar capabilities, mitigating noise ...

Ultra-thin and broadband low-frequency underwater acoustic meta ...

Most reported metamaterials, however, are for airborne sound, with fewer for low-frequency waterborne sound absorption because of water's much ...

An effective method to enhance the underwater sound absorption ...

An effective method to enhance the underwater sound absorption performance by constructing a membrane-type acoustic metamaterial, Yingjian Sun, Xujin Yuan, ...

Underwater acoustic ground cloak designed - ScienceDaily

Hanford and her team set out to engineer a metamaterial that can allow the sound waves to bend around the ...

Underwater Acoustic Manipulation Using Solid Metamaterials With ...

A new type of all-solid metamaterial model with anisotropic density and fluid-like elasticity is proposed for controlling acoustic propagation in an.