Results 21 to 30 of about 19,183 (214)
Polymer Testing, 2023 The underwater sound absorption material for submarines should fulfill the demand for remarkable performance in medium-low frequency sound absorption at low thicknesses.
Jingjing Nan +6 more
doaj +1 more source
Journal of Marine Science and Engineering, 2023 To further improve the low-frequency broadband sound absorption capability of the underwater anechoic layer (UAL) on the surface of marine equipment, a novel sound absorption structure with cavities (NSSC) is designed by adding resonators and honeycombs ...
Jinshun Hu +5 more
doaj +1 more source
Investigation of Parameters Affecting Underwater Communication Channel [PDF]
Журнал інженерних наук, 2020 Underwater communication has become a widely studied area in recent years and showed great potential to be an area of research. Acoustic communication is often preferred in underwater communication due to its suitability for an underwater diffusion ...
Aydin S., Onur T. O.
doaj +1 more source
Inverse design of periodic cavities in anechoic coatings with gradient changes of radii and distances via a conditional generative adversarial network. [PDF]
Sci RepAnechoic coatings are usually applied to underwater targets, such as submarine shells, to reduce the detection distance of enemy active sonar. The main challenge is obtaining low-frequency and broadband sound absorption characteristics through the design
Sun Y, Fu J, Wu Y, Chen J, Tao M.
europepmc +2 more sources
The light requirements for growth and photosynthesis in seagrasses with emphasis on Texas estuaries : a literature survey [PDF]
, 1993 During the last 20 years, seagrass communities throughout the world have experienced decreased productivity and distribution. These declines have often been attributed to decreased water transparency as a result of turbidity or shading by epiphytic algae.
Dunton, Kenneth H., Kaldy, J. E.
core +1 more source
Journal of Marine Science and Engineering, 2023 To address the problem that anechoic coatings frequently fall off from modern submersible hulls and are detrimental to the realization of underwater acoustic stealth, this paper focuses on the broadband sound absorbing of acoustic coverings in debonding ...
Zhifu Zhang +5 more
doaj +1 more source
Marine Acoustic Zones of Australia
Journal of Marine Science and Engineering, 2021 Underwater sound is modelled and mapped for purposes ranging from localised environmental impact assessments of individual offshore developments to large-scale marine spatial planning.
Christine Erbe +3 more
doaj +1 more source
Shock and Vibration, 2021 Viscoelastic material acoustic coating plays an important role in noise and vibration control of underwater equipment. The dynamic mechanical properties of the viscoelastic material have a direct effect on the sound absorption performance of the acoustic
Zhuhui Luo +3 more
doaj +1 more source
Underwater Acoustic Detection of Ultra High Energy Neutrinos
, 2005 We investigate the acoustic detection method of 10^18-20 eV neutrinos in a Mediterranean Sea environment. The acoustic signal is re-evaluated according to dedicated cascade simulations and a complex phase dependant absorption model, and compared to ...
Aguilar +35 more
core +3 more sources
Results in Physics, 2019 Although the conventional locally resonant acoustic metamaterials (LRAMs) have shown better sound absorption performance in the low frequency band, the effective frequency range of the sound absorption performance is quite narrow relatively.
Kangkang Shi +4 more
doaj +1 more source