Nansha Gao
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View article: Electrospinning nanofilms to improve sound absorption of flexible or rigid porous material
Electrospinning nanofilms to improve sound absorption of flexible or rigid porous material Open
To further enhance the sound absorption capabilities of porous materials, we employed electrospinning technology to prepare electrospinning nanofilms using polyvinyl butyral solution. These nanofilms were then applied in varying thicknesse…
View article: Broadband multi-unit composite metamaterial for simultaneous sound wave and electromagnetic wave absorption
Broadband multi-unit composite metamaterial for simultaneous sound wave and electromagnetic wave absorption Open
We propose a broadband multi-unit composite metamaterial consisting of nine sub-units capable of simultaneously achieving broadband noise reduction and electromagnetic wave absorption. A theoretical model was established to calculate the s…
View article: On-demand prediction of low-frequency average sound absorption coefficient of underwater coating using machine learning
On-demand prediction of low-frequency average sound absorption coefficient of underwater coating using machine learning Open
This study proposes an underwater coating with sound absorption ability in the middle-to-low frequency range and establishes an acoustic theoretical model combining the equivalent medium theory and the transfer matrix method. The sound abs…
View article: Ultra‐broadband sound absorption characteristics in underwater ultra‐thin metamaterial with three layer bubbles
Ultra‐broadband sound absorption characteristics in underwater ultra‐thin metamaterial with three layer bubbles Open
The interest of this article is to obtain the underwater broadband sound absorption characteristics by filling three layers of bubbles in Polydimethylsiloxane polymer (PDMS). In this underwater ultra‐thin metamaterial, three‐layer bubbles …
View article: Theoretical model and experimental study on working characteristics of electromagnetic damper
Theoretical model and experimental study on working characteristics of electromagnetic damper Open
An analysis model for electromagnetic damper is proposed in order to obtain the working characteristics of electromagnetic damper under different working conditions. Firstly, the inertia force and the electromagnetic force of electromagnet…
View article: Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes
Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes Open
Acoustic black holes (ABHs) are effective at suppressing vibrations at high frequencies, but their performance at low frequencies is limited. This paper aims to improve the low-frequency performance of ABH plates through the design of a me…
View article: Recent study progress of underwater sound absorption coating
Recent study progress of underwater sound absorption coating Open
Based on the recent development of underwater sound absorption coatings, this paper analyzes the evolution of underwater sound absorption coatings from two aspects: traditional structures and metamaterials. The traditional structures are d…
View article: SOUND RADIATION OF A METAPLATE MADE OF AN ACOUSTIC BLACK HOLE AND LOCAL RESONATORS
SOUND RADIATION OF A METAPLATE MADE OF AN ACOUSTIC BLACK HOLE AND LOCAL RESONATORS Open
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View article: Periodic Acoustic Black Holes to Mitigate Sound Radiation from Cylindrical Structures
Periodic Acoustic Black Holes to Mitigate Sound Radiation from Cylindrical Structures Open
Acoustic black holes (ABHs) achieved by progressively diminishing structural thickness have been proved a very efficient approach for wideband vibration reduction, sound suppression, energy harvesting, and wave manipulation. In this chapte…
View article: A light-weight periodic plate with embedded acoustic black holes and bandgaps for broadband sound radiation reduction
A light-weight periodic plate with embedded acoustic black holes and bandgaps for broadband sound radiation reduction Open
Conceiving lightweight structures with low vibration and sound radiation properties is an important topic. The concept of Acoustic Black Hole (ABH) offers new impetus to tackle this problem. Most existing ABH structures are based on simple…
View article: Progress and applications of acoustic black holes
Progress and applications of acoustic black holes Open
The problem of vibration and noise has always been one of the difficulties in the development of society. Therefore, the innovation of vibration and noise reduction methods has never stopped. In recent years, the introduction of acoustic b…
View article: DUPLICATE: Experimental investigation of sound absorption in a composite absorber
DUPLICATE: Experimental investigation of sound absorption in a composite absorber Open
The Publisher regrets that this article is an accidental duplication of an article that has already been published, http://dx.doi.org/10.1016/j.endend.2014.06.001. The duplicate article has therefore been withdrawn. The full Elsevier Polic…
View article: Experimental investigation of sound absorption in a composite absorber
Experimental investigation of sound absorption in a composite absorber Open
A composite absorber made of a polyurethane sponge and multi-layer micro-perforated plates is presented in this study. Results from an acoustic impedance tube test show that the polyurethane sponge can exhibits higher low-frequency sound a…
View article: Teaching-learning-based optimization of a composite metastructure in the 0–10 kHz broadband sound absorption range
Teaching-learning-based optimization of a composite metastructure in the 0–10 kHz broadband sound absorption range Open
This paper proposes a strategy to broaden the sound absorption region of porous materials by embedding ribs. The theoretical solution and the numerical simulations of the optimization model show that the composite metastructure exhibits ul…
View article: Elastic Wave Modulation in Hollow Metamaterial Beam With Acoustic Black Hole
Elastic Wave Modulation in Hollow Metamaterial Beam With Acoustic Black Hole Open
We propose and discuss the elastic wave attenuation of hollow metamaterial beam embedded acoustic black hole. More abundant physical phenomena are given by modal analysis, shows that the band gap of three-dimensional acoustic black hole me…
View article: Design and experimental investigation of V-folded beams with acoustic black hole indentations
Design and experimental investigation of V-folded beams with acoustic black hole indentations Open
This paper proposes a strategy to broaden complete bandgap attenuating flexural and longitudinal modes, and to shift them to lower frequencies by spatially folding designs. Numerical simulations show that the V-folded acoustic black hole b…
View article: Sound absorption characteristic of micro-helix metamaterial by 3D printing
Sound absorption characteristic of micro-helix metamaterial by 3D printing Open
We present the design of micro-helix metamaterial supporting high sound absorption characteristic by 3D printing. The sample structure which is fabricated out of polylactide (PLA) material, many micro-helix are arranged by periodic arrays …
View article: A lightweight low-frequency sound insulation membrane-type acoustic metamaterial
A lightweight low-frequency sound insulation membrane-type acoustic metamaterial Open
A novel membrane-type acoustic metamaterial with a high sound transmission loss (STL) at low frequencies (⩽500Hz) was designed and the mechanisms were investigated by using negative mass density theory. This metamaterial’s structure is lik…