Results 31 to 40 of about 3,850 (165)
Influence of the Plaster Physical Structure on Indoor Acoustics
Archives of Acoustics, 2021 The article presents the main results of research on plaster samples with different physical parameters of their structure. The basic physical parameter taken into account in the research is plaster aeration.
Edyta PRĘDKA +2 more
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Acoustic Imaging and Subsurface Absorption Structur of Sunspots [PDF]
Symposium - International Astronomical Union, 1998 Recently, Chang et al. (1997, hereafter Paper I) developed a new method, based on time-distance curves (Duvall et al. 1993), to construct a three-dimensional acoustic intensity image of the solar interior. Here we report results from another data set.Solar p-mode waves, which are continually generated and dissipated stochastically by the turbulent ...
H.-K. Chang, D.-Y. Chou, B. Labonte
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The Department of Acoustics at the Building Research Institute (ITB): A historical overview
Acta AcusticaThe article presents the development of the Department of Acoustics at the Building Research Institute (ITB) in Poland and its contribution to the evolution of building acoustics in the twentieth and early twenty-first centuries.
Nowicka Elzbieta, Nurzynski Jacek
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Journal of Natural FibersThis 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 +6 more
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Green Underwater Wireless Communications Using Hybrid Optical-Acoustic Technologies
IEEE Access, 2021 Underwater wireless communication is a rapidly growing field, especially with the recent emergence of technologies such as autonomous underwater vehicles (AUVs) and remotely operated vehicles (ROVs). To support the high-bandwidth applications using these
Kazi Yasin Islam +4 more
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Acoustic Absorption of Natural Fiber Composites [PDF]
Journal of Engineering, 2016 The current study is a bibliographic observation on prevailing tendencies in the development of acoustic absorption by natural fiber composites. Despite having less detrimental environmental effects and thorough availability, natural fibers are still unsuitable for wide implementation in industrial purposes.
Hasina Mamtaz +3 more
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Sound absorption by acoustic microlattice with optimized pore configuration [PDF]
The Journal of the Acoustical Society of America, 2018 The great progress in material science and nano-micro fabrication enables the applications of metamaterials with well-defined and well-organized microstructures for noise reduction. However, what intrinsic morphology of the metamaterial would result in optimum sound absorbing efficiency remains uncertain. This work presents a microlattice metamaterial,
Cai, Xiaobing +3 more
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Absorption in Hydro-Acoustic Networks
, 2013 Water covers over 70% of the globe, yet our ability to communicate in the underwater environment is limited. Radio and light communication through water suffer from such major issues that acoustic waves are the dominant form of cable-free underwater communication, but themselves suffer from low bandwidth and poor signal quality.
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Muhandisī-i bihdāsht-i ḥirfah/ī, 2016 Introduction: In Iran country, there is a lack of reliable data on acoustic characteristics of building materials applied in the offices and industrial rooms.
Mohsen Aliabadi +3 more
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Modeling the acoustic absorption behaviour of polylactide open cell foams with bimodal structure for high acoustic absorption [PDF]
Proceedings of Meetings on Acoustics, 2013 Through this research, highly porous open cell foams were fabricated with Polylactide (PLA) and Polyethylene glycol (PEG) using compression molding combined with particulate leaching technique. Salt and water soluble polymer were used as the particulates.
Shahrzad Ghaffari Mosanenzadeh +4 more
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