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Advanced Search Results For "ACOUSTICAL materials"

1 - 10 of 2,582 results for
 "ACOUSTICAL materials"
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Investigation of Fibrous Materials for Low Frequency and High-Frequency Passive Noise Reduction using Transfer Matrix Method .

Publication Type:Academic Journal

Source(s):Journal of Scientific Research. 2022, Vol. 14 Issue 1, p101-114. 14p.

Abstract:The concern about the adverse effects of noise pollution is enhancing day by day due to fast industrialization. Hence a wide variety of active and passive noise controllers made of natural and synthetic materials are widely used for various types of in...

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Topology Optimization of Sound-Absorbing Materials for Two-Dimensional Acoustic Problems Using Isogeometric Boundary ElementMethod.

Publication Type:Academic Journal

Source(s):CMES-Computer Modeling in Engineering & Sciences. 2023, Vol. 134 Issue 2, p981-1003. 23p.

Abstract:In this work, an acoustic topology optimizationmethod for structural surface design covered by porous materials is proposed. The analysis of acoustic problems is performed using the isogeometric boundary elementmethod. Taking the element density of por...

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Fracture Characteristics of Polyurethane Grouting Materials Based on Acoustic Emission Monitoring.

Publication Type:Academic Journal

Source(s):Shock & Vibration. 6/14/2021, p1-14. 14p.

Abstract:In this study, 16 groups of tests were designed by the orthogonal test method, and a PU grouting material was prepared, which can be used for the construction of sealing wall in mined-out area of coal mine. The basic properties of the material were mea...

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Inverse design of a Helmholtz resonator based low-frequency acoustic absorber using deep neural network.

Publication Type:Academic Journal

Source(s):Journal of Applied Physics. 5/7/2021, Vol. 129 Issue 17, p1-17. 17p.

Abstract:The design of low-frequency sound absorbers with broadband absorption characteristics and optimized dimensions is a pressing research problem in engineering acoustics. In this work, a deep neural network based inverse prediction mechanism is proposed t...

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ACOUSTIC PROPERTIES OF SANDWICH ABSORBERS MADE ON THE BASIS OF COMPONENTS FROM VEHICLES AFTER THEIR LIFETIME.

Publication Type:Academic Journal

Source(s):Annals of the Faculty of Engineering Hunedoara - International Journal of Engineering. Feb2021, Issue 1, p101-109. 9p.

Abstract:In spite of existing European and national legislation aimed at noise abatement, public interest and concern about noise are high. The EU Directive 70/157/EEC [4] for setting and controlling environmental noise is aimed at creating less noisy and more ...

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Multifunctional cellulose wood with effective acoustic absorption.

Publication Type:Academic Journal

Source(s):AIP Advances. May2022, Vol. 12 Issue 5, p1-7. 7p.

Abstract:Wood is a sustainable material with big sound absorption potential based on its natural porous characteristics. However, the acoustic absorption performance of wood is greatly limited by the low permeability of wood structures. In this study, we prepar...

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Tunable low-frequency and broadband acoustic metamaterial absorber.

Publication Type:Academic Journal

Source(s):Journal of Applied Physics. 3/7/2021, Vol. 129 Issue 9, p1-8. 8p.

Abstract:Current sound-absorbing materials have fixed absorption spectra due to unalterable local resonance properties, which limit their application potential in many noise control scenarios. Clear motivation exists, therefore, to design an acoustic absorber t...

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Miniaturized Spiral Metamaterial Array for a Ventilated Broadband Acoustic Absorber.

Publication Type:Academic Journal

Source(s):Shock & Vibration. 11/2/2020, p1-6. 6p.

Abstract:The high-efficiency and broadband acoustic reduction performance in a miniaturized free-flow structure remains challenging in acoustic engineering applications due to the contradiction of ventilation and acoustic reduction performance. Traditional acou...

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Dynamic sound absorption characteristics of a series piezoelectric acoustic absorber regulated by voltage.

Publication Type:Academic Journal

Source(s):Journal of the Acoustical Society of America. Jun2022, Vol. 151 Issue 6, p3807-3817. 11p.

Abstract:A piezoelectric acoustic absorber composed of double micro-perforated panels (MPPs) and their back cavity is studied in this paper. The outer layer of the MPP absorber is a common metal MPP, and the inner layer is a piezoelectric MPP made of polyvinyli...

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Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators.

Publication Type:Academic Journal

Source(s):Materials (1996-1944). May2022, Vol. 15 Issue 10, p3417-3417. 19p.

Abstract:An acoustic metamaterial absorber of parallel–connection square Helmholtz resonators is proposed in this study, and its sound absorption coefficients are optimized to reduce the noise for the given conditions in the factory. A two–dimensional equivalen...

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