Results 21 to 30 of about 625,137 (266)

Design and Fabrication Challenges for Millimeter-Scale Three-Dimensional Phononic Crystals

Crystals, 2017
While phononic crystals can be theoretically modeled with a variety of analytical and numerical methods, the practical realization and comprehensive characterization of complex designs is often challenging.
Frieder Lucklum, Michael J. Vellekoop
doaj   +1 more source

Predicting Acoustic Transmission Loss Uncertainty in Ocean Environments with Neural Networks

Journal of Marine Science and Engineering, 2022
Computational predictions of acoustic transmission loss (TL) in ocean environments depend on the relevant environmental characteristics, such as the sound speed field, bathymetry, and seabed properties.
Brandon M. Lee, Jay R. Johnson, David R. Dowling   +2 more
doaj   +1 more source

Transmission loss in manatee habitats

The Journal of the Acoustical Society of America, 2006
The Florida manatee is regularly exposed to high volumes of vessel traffic and other human-related noise because of its coastal distribution. Quantifying specific aspects of the manatee’s acoustic environment will allow for a better understanding of how these animals respond to both natural and human-induced changes in their environment.
Miksis-Olds, Jennifer L., Miller, James H.   +1 more
openaire   +4 more sources

Transmission Loss of Plasterboard Walls [PDF]

The Journal of the Acoustical Society of America, 1966
Although test data are available for many variations of the typical plasterboard wall, there are enough minor variations in construction or test technique that it is difficult to deduce accurately the effects of the various parameters. Accordingly, a systematic study has been made of a number of experimental and practical walls.
openaire   +1 more source

Ultra-Low-Loss Hollow-Core Anti-Resonant Fiber Combining Double-Tube Nesting and a Single-Layer Anti-Resonant Wall

Photonics
This study innovatively presents a hollow-core anti-resonant fiber integrating double-tube nesting and a single-layer anti-resonant wall. Featuring an exclusive two-layer cladding configuration along with an outer cladding circular ring, it differs ...
Xingtao Zhao, Mu Wang, Wenke Zhang, Jinlong Luo, Chang Liu, Sai Liu, Juncheng Li   +6 more
doaj   +1 more source

Local model of plane acoustic waves propagation in multilayered infinite sandwich structures

Archives of Mechanics, 2011
A local model for computing the coincidence frequencies and the transmission loss of multilayered infinite sandwich plates composed of isotropic layers is presented in the paper. The model is derived within the local theory of linear elastodynamics under
S. Karczmarzyk
doaj   +1 more source

High-Transmission-Loss Wall Panels [PDF]

The Journal of the Acoustical Society of America, 1971
Under a program sponsored by the Department of Housing and Urban Development, several unique wall designs have been developed and tested. These designs incorporate several features that enable high values of transmission loss to be obtained, values much higher than those presently available from common walls presently in use.
B. H. Sharp, K. M. Eldred, J. W. Swing
openaire   +1 more source

Seismic airgun sound propagation in shallow water of the East Siberian shelf and its prediction with the measured source signature

Frontiers in Marine Science, 2023
Seismic airgun sound was measured with an autonomous passive acoustic recorder as a function of distance from 18.6 to 164.2 km in shallow water (<70 m) at the continental shelf of the East Siberian Sea in September 2019.
Dong-Gyun Han, Sookwan Kim, Martin Landrø, Wuju Son, Wuju Son, Dae Hyeok Lee, Young Geul Yoon, Jee Woong Choi, Jee Woong Choi, Eun Jin Yang, Yeonjin Choi, Young Keun Jin, Jong Kuk Hong, Sung-Ho Kang, Tae Siek Rhee, Hyoung Chul Shin, Hyoung Sul La, Hyoung Sul La   +17 more
doaj   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Study on Nature Fiber Composite for Noise Material Control

International Journal of Technology
Transportation tracks of railways and highways are the highest noise pollution contribution to the inhabitant urban due to the sources near residential areas. Many researchers proved that the composite material could help reduce the noise by 30%. This
Muhammad Zulkarnain, Irianto Harny, Mohamad Irfan Insdrawaty, Mohamad Izmul Farees Azman, Muhamad Izwan Aiman Azmi, Eny Kusrini   +5 more
doaj   +1 more source