scholarly journals AIRNOISE: a Tool for Preliminary Noise-Abatement Terminal Approach Route Design

2016 ◽  
Author(s):  
Jinhua Li ◽  
Banavar Sridhar ◽  
Min Xue ◽  
Hok Ng
Keyword(s):  
Noise Abatement ◽  
Route Design ◽  
Approach Route

The Noise Abatement Campaign in Industrializing Japan, 1923–37

Resonance ◽  
2020 ◽  
Vol 1 (3) ◽  
pp. 298-327
Author(s):  
Shuhei Hosokawa
Keyword(s):  
Public Opinion ◽  
Legal Regulation ◽  
Public Realm ◽  
Political Responsibility ◽  
Noise Abatement ◽  
Public And Private ◽  
The Public ◽  
Causal Responsibility ◽  
Kanto Earthquake ◽  
Definition Of

Drawing on Karin Bijsterveld’s triple definition of noise as ownership, political responsibility, and causal responsibility, this article traces how modern Japan problematized noise, and how noise represented both the aspirational discourse of Western civilization and the experiential nuisance accompanying rapid changes in living conditions in 1920s Japan. Primarily based on newspaper archives, the analysis will approach the problematic of noise as it was manifested in different ways in the public and private realms. In the public realm, the mid-1920s marked a turning point due to the reconstruction work after the Great Kantô Earthquake (1923) and the spread of the use of radios, phonographs, and loudspeakers. Within a few years, public opinion against noise had been formed by a coalition of journalists, police, the judiciary, engineers, academics, and municipal officials. This section will also address the legal regulation of noise and its failure; because public opinion was “owned” by middle-class (sub)urbanites, factory noises in downtown areas were hardly included in noise abatement discourse. Around 1930, the sounds of radios became a social problem, but the police and the courts hesitated to intervene in a “private” conflict, partly because they valued radio as a tool for encouraging nationalist mobilization and transmitting announcements from above. In sum, this article investigates the diverse contexts in which noise was perceived and interpreted as such, as noise became an integral part of modern life in early 20th-century Japan.

scholarly journals Design of a Variable-Stiffness Compliant Skin for a Morphing Leading Edge

2021 ◽  
Vol 11 (7) ◽  
pp. 3165
Author(s):  
Zhigang Wang ◽  
Yu Yang
Keyword(s):  
Composite Laminate ◽  
Large Scale ◽  
Design Method ◽  
Leading Edge ◽  
Variable Stiffness ◽  
Manufacturing Constraints ◽  
Aircraft Wing ◽  
Noise Abatement ◽  
Civil Aircraft ◽  
Final Profile

A seamless and smooth morphing leading edge has remarkable potential for noise abatement and drag reduction of civil aircraft. Variable-stiffness compliant skin based on tailored composite laminate is a concept with great potential for morphing leading edge, but the currently proposed methods have difficulty in taking the manufacturing constraints or layup sequence into account during the optimization process. This paper proposes an innovative two-step design method for a variable-stiffness compliant skin of a morphing leading edge, which includes layup optimization and layup adjustment. The combination of these two steps can not only improve the deformation accuracy of the final profile of the compliant skin but also easily and effectively determine the layup sequence of the composite layup. With the design framework, an optimization model is created for a variable-stiffness compliant skin, and an adjustment method for its layups is presented. Finally, the deformed profiles between the directly optimized layups and the adjusted ones are compared to verify its morphing ability and accuracy. The final results demonstrate that the obtained deforming ability and accuracy are suitable for a large-scale aircraft wing.

scholarly journals Changes in the Soundscape of the Public Space Close to a Highway by a Noise Control Intervention

2021 ◽  
Vol 13 (9) ◽  
pp. 5284
Author(s):  
Timothy Van Renterghem ◽  
Francesco Aletta ◽  
Dick Botteldooren
Keyword(s):  
Public Space ◽  
Real Life ◽  
Noise Abatement ◽  
Acoustic Environment ◽  
The Public ◽  
Control Intervention ◽  
Before And After ◽  
Noise Shielding ◽  
Visual Preferences ◽  
The Impact

The deployment of measures to mitigate sound during propagation outdoors is most often a compromise between the acoustic design, practical limitations, and visual preferences regarding the landscape. The current study of a raised berm next to a highway shows a number of common issues like the impact of the limited length of the noise shielding device, initially non-dominant sounds becoming noticeable, local drops in efficiency when the barrier is not fully continuous, and overall limited abatement efficiencies. Detailed assessments of both the objective and subjective effect of the intervention, both before and after the intervention was deployed, using the same methodology, showed that especially the more noise sensitive persons benefit from the noise abatement. Reducing the highest exposure levels did not result anymore in a different perception compared to more noise insensitive persons. People do react to spatial variation in exposure and abatement efficiency. Although level reductions might not be excessive in many real-life complex multi-source situations, they do improve the perception of the acoustic environment in the public space.

scholarly journals Development of a highway geometry based noise abatement model

2021 ◽  
Vol 10 ◽  
pp. 100382
Author(s):  
Mehdi Shokouhian ◽  
Oludare Owolabi ◽  
Steve Efe ◽  
Sotonye Ikiriko ◽  
Tiyobistiya Tsegaye
Keyword(s):  
Noise Abatement

An efficient route design for solid waste collection using graph theory and the algorithm of the traveling agent in dynamic programming

2021 ◽  
Vol 193 (5) ◽  
Author(s):  
Moisés Filiberto Mora Murillo ◽  
Walter Alfredo Mora Murillo ◽  
Luis Xavier Orbea Hinojosa ◽  
Arlys Michel Lastre Aleaga ◽  
Gabriel Estuardo Cevallos Uve ◽  
...  
Keyword(s):  
Dynamic Programming ◽  
Graph Theory ◽  
Solid Waste ◽  
Waste Collection ◽  
Solid Waste Collection ◽  
Route Design ◽  
Efficient Route

Noise Reduction by Using Composite Plate

2008 ◽  
Vol 47-50 ◽  
pp. 1229-1232
Author(s):  
C.W. Chau ◽  
Y.S. Choy ◽  
Kin Tak Lau ◽  
Yang Liu
Keyword(s):  
Noise Reduction ◽  
Carbon Fibers ◽  
Side Branch ◽  
Bending Stiffness ◽  
Composite Panel ◽  
Expansion Chamber ◽  
Noise Abatement ◽  
High Tension ◽  
And Performance ◽  
Very High

The plate silencer1 which consists of an expansion chamber with two side branch cavities covered by a light panel can achieve a desirable noise reduction in broadband theoretically. The concept is similar to drum silencer2. To attain optimal noise reduction, either the membrane should be of minimal weight while retaining very high tension or the panel should be kept with very high bending stiffness that is dependent on its geometry and mechanical properties. To achieve such goal, various kinds of composite system such as carbon fibers or aluminum were mounted on light core foam. A design of the composite panel which can provide a reduction in panel weight as well as enhance the bending stiffness, is introduced in this project. Predictions of the new model are to be compared with the normal foam plate in the aspects of noise reflection capability and performance of noise abatement apart from the material properties.

scholarly journals Value for Money in Road Traffic Noise Abatement

2012 ◽  
Vol 48 ◽  
pp. 1366-1374 ◽  
Author(s):  
Ingunn Milford ◽  
Sigve J. Aasebo ◽  
Kjell Strommer
Keyword(s):  
Road Traffic ◽  
Traffic Noise ◽  
Road Traffic Noise ◽  
Value For Money ◽  
Noise Abatement
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