Results 31 to 40 of about 2,485,601 (152)
Dual-band perfect low-frequency acoustic absorption based on metaporous composite
, 2021 We present a low-frequency dual-band (303 and 356 Hz) perfect acoustic absorption (PA) metaporous. The metaporous composite is constructed by introducing Helmholtz resonance and Fabry–Pérot resonance in porous materials.
Yukun Zhou +3 more
semanticscholar +1 more source
An Integration Strategy for Acoustic Metamaterials to Achieve Absorption by Design
Applied Sciences, 2018 As much of metamaterials’ properties originate from resonances, the novel characteristics displayed by acoustic metamaterials are a narrow bandwidth and high dispersive in nature. However, for practical applications, broadband is often a necessity.
Min Yang, Ping Sheng
doaj +1 more source
Frontiers in Mechanical Engineering, 2021 Underwater acoustic wave absorption and control play an important role in underwater applications. Various types of underwater acoustic metamaterials have been proposed in recent years with the vigorous development of acoustic metamaterials.
Junyi Wang, Jiaming Hu, Yun Chen
doaj +1 more source
The acoustic absorption of textile curtains on the function of the fullness
Materiales de Construccion, 2013 Acoustic absorbing materials are applied to reduce noise levels in a room. They are also used to adjust the reverberation time an acoustic enclosure to use for which it´s designed. There are multi-purpose rooms for conferences, concerts, cinemas, etc. In
R. del Rey, J. Alba, M. Blanes, B. Marco
doaj +1 more source
Additively manufactured metamaterials for acoustic absorption: a review
Virtual and Physical PrototypingNoise pollution, a major concern in modern life, contributes to various mental and psychological problems. In this study, we concentrate on the recent developments in metamaterials, particularly additively manufactured acoustic-absorbing metamaterials ...
Vignesh Sekar +5 more
semanticscholar +1 more source
Sensors, 2023 Reconstruction of the acoustic relaxation absorption curve is a powerful approach to ultrasonic gas sensing, but it requires knowledge of a series of ultrasonic absorptions at various frequencies around the effective relaxation frequency.
Kun Shen +4 more
doaj +1 more source
Virtual and Physical PrototypingThe current designs of low-frequency acoustic absorption metamaterials suffer from inadequate prediction accuracy and low efficiency. Herein, by integrating impedance theory with artificial neural networks, we propose an optimisation method of unit ...
Xin Yan +6 more
semanticscholar +1 more source
Noise Reduction Potential of Cellular Metals
Metals, 2012 Rising numbers of flights and aircrafts cause increasing aircraft noise, resulting in the development of various approaches to change this trend. One approach is the application of metallic liners in the hot gas path of aero-engines.
Björn Hinze +2 more
doaj +1 more source
On the Use of Perforated Sound Absorption Systems for Variable Acoustics Room Design
Buildings, 2021 An important challenge for acoustic engineers in room acoustics design is related to the acoustic performance of multi-purpose auditoriums, which are typically designed to suit several performance requirements.
Andreia Pereira +7 more
doaj +1 more source
Investigation of effective factors of woven structure fabrics for acoustic absorption
, 2020 Textiles have been used as noise reduction materials in construction, automotive and other industries for its performance of porous, light and easy processing, but few studies have been done on the sound absorption properties of woven fabrics.
L. Huiqin +5 more
semanticscholar +1 more source