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Comparison of Linear and Non-linear Feedforward Algorithms to Control Chaotic and Impulsive Noise
Linear feed-forward adaptive algorithms are widely used for creating a quiet zone inside an enclosure for different noise signals like tonal,...
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A Statistical Energy Analysis Model of a Metro Train Running in a Tunnel for Prediction of the Internal Noise
The current work aims to propose a statistical energy analysis (SEA) model for simulating a metro train in a tunnel, considering mechanics/acoustic...
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Study on Noise Characteristics of Marine Centrifugal Pump Under Different Cavitation Stages
Based on judging the different stages of cavitation through high-speed photography experiments, this paper presents a strategy for analyzing the...
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Adjustable and extensible hexagonal acoustic metamaterial cell combining multiple parallel Helmholtz resonators with optional apertures
To prevent noise pollution, a hexagonal acoustic metamaterial cell combining multiple parallel Helmholtz resonators with optional apertures is...
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Noise Reduction
Noise reduction is always associated with the reduction of people’s exposure to noise. This is due to the fact that the term noise is understood to...
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Semi-analytical estimation of Helmholtz resonators’ tuning frequency for scalable neck-cavity geometric couplings
Innovative meta-materials offer great flexibility for manipulating sound waves and assure unprecedented functionality in the context of acoustic...
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Basics
Some requirements for the planning of technical facilities in buildings are described. These include the basics of thermal comfort in rooms, the...
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Acoustic Performance of Some Lined Dissipative Silencers
Heating ventilating and air-conditioning systems which equip our buildings/rooms represent noise sources unfavorable affecting the people decent...
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New Trends in Acoustic Testing in Buildings
Acoustic testing techniques are traditionally and most often used to characterise construction materials and construction elements, either to certify...
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The mathematical analysis and review of noise in industrial valves
In general, “noise” describes a loud, unpleasant, and disruptive sound that has undesirable psychological effects such as depression and...
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A Multi-layer Low-Frequency Broadband Membrane-Type Acoustic Metamaterial Sound Isolator
A multi-layer low-frequency broadband membrane-type acoustic metamaterial sound isolator were investigated. It is a multi-layer...
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Design and Fabrication of a Patch Antenna for Underwater Communications
Underwater communication is a mode of transmitting or receiving the signals below water. Many applications such as shipments, autonomous vehicle,...
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Multi-channel ANC System with Online Secondary Path Modeling for Turboprop Aircraft Cabin
The engineering implementation of the multi-channel active noise control (MCANC) system for turboprop aircraft cabin is seriously hampered by its...
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Research Advances on Aerodynamic Noise of High-Speed Trains
With the increase in operating speed, aerodynamic noise become the technical bottleneck restricting the development of the high-speed railway. This...
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Study of Fractal Honeycomb Structural Mechanics Metamaterial Vibration Bandgap Characteristics
PurposeA new mechanical metamaterial with a periodic fractal honeycomb structure was designed and optimized based on the vibration and noise...
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Research on Dual-Functional Properties of an Asymmetric Piezoelectric Metamaterial Beam for Simultaneous Vibration Reduction and Power Generation
PurposeIn this paper, an asymmetric dual-functional piezoelectrical metamaterial beam is constructed to achieve vibration reduction and power...
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Acoustic metamaterial design for noise reduction in vacuum cleaner
In this study, we investigate the acoustic metamaterial (AMM) design for flow noise reduction when using a vacuum cleaner. The AMM was based on the...
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Physical Basics
The physical foundations are the prerequisite for understanding the interrelationships in design acoustics and/or noise reduction. The theoretical...
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A PVDF-Based Ultrasonic and UHF Sensing Technology for PD Detection of GIS Equipment
At present, it is common to use external ultrasonic sensor and built-in UHF sensor to detect the partial discharge signal in GIS. The defects of this...
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A novel bio-inspired lattice metamaterial for energy absorption and vibration mitigation
In response to the growing demand for sophisticated engineering applications, this study introduces a novel lattice metamaterial inspired by the...