Results 171 to 180 of about 116,729 (347)

Nonlocal active sound control for composite regions

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
In the active sound control problem, additional sound sources, known as control sources, are implemented at the perimeter of a protected domain. The control sources can generate secondary sound inside the shielded domain, which attenuates incoming noise. This leads to an inverse source problem.
Nan Hu, Sergey Utyuzhnikov
wiley   +1 more source

Acoustic Propagation Characteristics of Acoustic Logging Instrument

open access: yesShiyou jixie, 2016
Most of the shells of the sonic logging tools in domestic are the results of imitation,which are unable to predict the sound insulation performance before manufacturing.To develop a shell with better sound insulation performance,the sound propagation ...
Wang He   +5 more
doaj  

Kinetic Compensation of Barrel Launch Under High‐Speed Solid‐Phase Particulate Impacts

open access: yesInternational Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT An accurate launch‐dynamics computational method is critical for barrel weapon service life assessment and multiphase physics field refinement. Given the lack of studies on the solid‐phase buildup behavior at the projectile base, this paper provides an improved method for calculating the launching dynamics under high pressure and high speed ...
Zhiyi He   +3 more
wiley   +1 more source

Sound insulation of multi-storey houses: Summary of impact sound insulation

open access: yes, 2022
Problems connected with the sound insulation of wooden multi-storey buildings are even more severe than those connected with fire safety. Evidently a wooden house can be built so that modern requirements for both the airborne and the impact sound insulation are met with sufficient margins.
openaire   +1 more source

Digital surveillance of animals and nature recovery

open access: yesPeople and Nature, EarlyView.
Abstract Digital surveillance technologies (DSTs) are widely applied in nature recovery for their potential to generate novel data on species and ecosystems through digital tracking, automation (e.g. from hazardous locations) and from newly recruited citizen scientists.
William M. Adams
wiley   +1 more source

Acoustic and Thermal Properties of Mycelium-based Insulation Materials Produced from Desilicated Wheat Straw - Part B

open access: yesBioResources
The acoustic and thermal properties were determined for biodegradable insulation materials produced from desilicated wheat straws with two different fungi and three different incubation periods.
Engin Derya Gezer, Süleyman Kuştaş
doaj   +2 more sources

Sound Insulation of Floors: A New Composite with a Resilient Layer of Recycled Polymer [PDF]

open access: hybrid, 2016
Aline Zini   +5 more
openalex   +1 more source

The Age and Origin of Block Deposits in the Victorian Alps, Australia

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT Large periglacial block deposits are found in the mountains of southeastern Australia. Despite their widespread distribution, their mode of formation and age are poorly understood. These landforms hold considerable potential to shed light on the nature of cooling during glacial periods. In this paper we present a new study of block deposits in
Timothy T. Barrows   +4 more
wiley   +1 more source

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