Results 1 to 10 of about 1,827,815 (335)

Computational Accuracy and Efficiency of Room Acoustics Simulation Using a Frequency Domain FEM with Air Absorption: 2D Study

Applied Sciences, 2023
Recently, to simulate sound propagation inside architectural spaces at high frequencies, the application of computationally expensive wave-based numerical methods to room acoustics simulation is increasing gradually.
Takeshi Okuzono
doaj   +2 more sources

3D‐Printed Lattice Structures for Sound Absorption: Current Progress, Mechanisms and Models, Structural‐Property Relationships, and Future Outlook

Advanced Science, 2023
The reduction of noises, achieved through absorption, is of paramount importance to the well‐being of both humans and machines. Lattice structures, defined as architectured porous solids arranged in repeating patterns, are emerging as advanced sound ...
Xinwei Li, Jun Wei Chua, Xiang Yu, Zhendong Li, Miao Zhao, Zhonggang Wang, Wei Zhai   +6 more
doaj   +2 more sources

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, Anna Gaspar, Luís Godinho, Paulo Amado Mendes, Diogo Mateus, Jesus Carbajo, Jaime Ramis, Pedro Poveda   +7 more
doaj   +2 more sources

Constrained least-squares and maximum-likelihood calibration of absorption coefficients in reverberation time equations

Acta Acustica
Calibration of material properties in room acoustics simulations is essential to producing realistic results. However, the number of available algorithms for calibrating room acoustics models remain limited. This work presents two methods for calibrating
Bellows Samuel D., Katz Brian F. G.
doaj   +2 more sources

Acoustic coherent perfect absorption based on a PT symmetric coupled Mie resonator system

APL Materials, 2023
Parity-time (PT) symmetric coupled resonator systems have exhibited intriguing and unexpected properties in optics and electronics. Here, we extend it to acoustics and report a coupled Mie resonators (MRs) system respecting PT symmetry.
Fangfang Ju, Chen Liu, Ying Cheng, Shengyou Qian, Xiaojun Liu   +4 more
doaj   +2 more sources

Tunable Perforated Panel Sound Absorbers for Variable Acoustics Room Design

Applied Sciences
Variable acoustics systems are promising engineering developments for multi-purpose rooms and workspaces in many buildings. However, due to space requirements associated with most of the tuning devices used for that purpose, these solutions are hardly ...
Jesús Carbajo, Pedro Poveda-Martínez, Luís Godinho, Andreia Pereira, Anna Gaspar, Paulo Amado-Mendes, Diogo Mateus, Jaime Ramis   +7 more
doaj   +2 more sources

Utilizing Waste Cotton/Pigeon Pea Stalk Fibers Composites for Enhanced Sound Absorption and Insulation in Automotive Interiors

Journal of Natural Fibers
This study investigates the synthesis and characterization of composite materials, pigeon pea stem, and cotton fibers blended in different ratios such as 100/0, 70/30, 60/40, 50/50, 30/70, and 0/100.
Ariharasudhan Subramanian, Senthil Kumar Selvaraj, Rajaram Mani, Preethibha Chandrasekaran, Shanthi Kunjuraman, Ramratan Guru, Sakthivel Santhanam   +6 more
doaj   +2 more sources

Research Progress on Sound Absorption of Electrospun Fibrous Composite Materials

Nanomaterials, 2022
Noise is considered severe environmental pollutant that affects human health. Using sound absorption materials to reduce noise is a way to decrease the hazards of noise pollution.
Xiuhong Li, Yujie Peng, Youqi He, Chupeng Zhang, Daode Zhang, Yong Liu   +5 more
doaj   +2 more sources

Nonlinear Optical Absorption in Nanoscale Films Revealed through Ultrafast Acoustics. [PDF]

Nano letters (Print), 2021
Herein we describe a novel spinning pump-probe photoacoustic technique developed to study nonlinear absorption in thin films. As a test case, an organic polycrystalline thin film of quinacridone, a well-known pigment, with a thickness in the tens of ...
I. Chaban, R. Deska, G. Privault, E. Trzop, M. Lorenc, S. Kooi, K. Nelson, M. Samoć, K. Matczyszyn, T. Pezeril   +9 more
semanticscholar   +1 more source

Absorption boundary conditions for geomertical acoustics [PDF]

, 2012
Defining accurate acoustical boundary conditions is of crucial importance for room acoustic simulations. In predicting sound fields using phased geometrical acoustics methods, the absorption coefficients or surface impedances of the boundary surfaces can be used, but no guideline has been developed on which boundary condition produces the best results.
Jeong, Cheol-Ho
core   +2 more sources