Results 31 to 40 of about 45,283 (307)

Analytical Expression for Sound Transmission Loss Calculation: An Improvement to the Existing Method after Singh and Katra [PDF]

, 2009
An analytical expression for measuring of sound transmission loss (TL) has been developed by using two microphones, an impedance tube and an impulse sound source as a proposed improvement to the existing procedure after Singh and Katra (1978).
Yahya, Iwan
core  

The influence of baffle fairings on the acoustic performance of rectangular splitter silencers

, 2005
A numerical model based on the finite element method is developed for a finite length, HVAC splitter silencer. The model includes an arbitrary number of bulk-reacting splitters separated from the airway by a thin perforated metal sheet and accommodates ...
Kirby, R, Ray Kirby
core   +1 more source

Shaping Matter with Acoustic Waves: From Particles to Functional Structures

Advanced Functional Materials, EarlyView.
Acoustic‐directed assembly is reviewed as a materials‐oriented strategy for organizing particles, polymers, metals, and biological systems into functional structures. The review distinguishes reversible manipulation from permanent structure formation through medium fixation, particle fixation, and in situ material generation, highlighting routes toward
Avraham Kenigsberg, Shelly Zlotnikov, Maya Fiorentino, Yuval Elias, Ornit Nagler‐Avramovitz, Hagay Shpaisman   +5 more
wiley   +1 more source

Sound transmission loss optimization of clamped double-panels

Journal of Low Frequency Noise, Vibration and Active Control
The panel cavity structure is one of the key components of the aircraft (vehicle) body and is among the main noise transmission pathways. Based on the modal superposition and Galerkin method, this paper realizes the theoretical model of sound insulation ...
Yumei Zhang, Ye Li, Xinbiao Xiao, Yue Zhao, Dan Yao, Yi Ai, Weijun Pan   +6 more
doaj   +1 more source

Research on acoustic conduction mechanism of underwater acoustic channel based on metamaterials

AIP Advances, 2020
In underwater acoustic communication, there are problems of low transmission efficiency, severe loss, and inaccurate point-to-point transmission. To realize the efficient transmission of underwater acoustic communication based on finite element analysis,
Xinsa Zhao, Peng Yang, Rongrong Zhao, Jianning Han   +3 more
doaj   +1 more source

Sound transmission loss: Comparison of conventional techniques with sound intensity techniques

The Journal of the Acoustical Society of America, 1985
Sound transmission losses for a single layer wall are measured in a reverberation room facility using conventional methods (ASTM E90) and the more recently introduced sound intensity method. The specimen is placed in five positions in the tunnel between the two reverberation rooms and measurements are made for four different absorptive conditions in ...
Halliwell, R. E., Warnock, A. C. C.
openaire   +3 more sources

Sustainable Electrochemical Synthesis of High‐Quality MXenes: Mechanistic Insights, Applications, Challenges, and Technological Prospects

Advanced Functional Materials, EarlyView.
Electrochemical etching provides an eco‐friendly alternative to hazardous HF methods for MXene production. This approach facilitates the selective isolation of the A‐layer from MAX phases with tunable surface terminations. Controlling voltage, electrolytes, temperature, and duration enables the optimal structural integrity. Nevertheless, existing scale
Jagdeep Singh, Madhusudhana M Devadiga, Santosh K. Tiwari, AS Dhaliwal, Gurpreet Singh Selopal   +4 more
wiley   +1 more source

Influence of the type of fastening of multi-layered closing panels on the estimate of the sound transmission loss

REM: International Engineering Journal
Industrialized closing systems appear as rational solutions in steel-structured construction. These closing systems, consisting of multi-layered panels, have been applied in projects where it is intended to obtain a high sound transmission loss without ...
Rovadávia Aline de Jesus Ribas, Henor Artur Souza   +1 more
doaj   +1 more source

Theoretical Analysis and Measurement of Sound Transmission Loss in Louver Elements with a Sound Attenuating Function Using a Narrow Tube Array

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2013
Sound transmission loss is relatively small in thin louver boards with a high aperture ratio. This study investigated louver elements with a sound attenuating function.
Shuichi SAKAMOTO, Hokuto SATO, Minoru YAMAZAKI, Ryohei SUGAHARA, Hiromichi KAWASE   +4 more
doaj   +1 more source

Comparasion of prediction and measurement methods for sound insulation of lightweight partitions [PDF]

Facta Universitatis. Series: Architecture and Civil Engineering, 2012
It is important to know the sound insulation of partitions in order to be able to compare different constructions, calculate acoustic comfort in apartments or noise levels from outdoor sources such as road traffic, and find engineer optimum solutions ...
Praščević Momir, Cvetković Dragan, Mihajlov Darko   +2 more
doaj   +1 more source