scholarly journals Noise source characteristics in the ISO 362 vehicle pass-by noise test: Literature review

2013 ◽  
Vol 74 (11) ◽  
pp. 1241-1265 ◽  
Author(s):  
M.E. Braun ◽  
S.J. Walsh ◽  
J.L. Horner ◽  
R. Chuter
2021 ◽  
Vol 263 (2) ◽  
pp. 4111-4119
Author(s):  
Lisa-Marie Wadle ◽  
Noemi Martin

Tourism is an important economic factor for countries, cities and individual beings. However, tourism also has an impact on the environment, e.g. in terms of noise. This does not only constitute a burden for locals but also effects tourists whose goal, among others, commonly is to rest during their holidays. A literature review was conducted covering the last ten years (2011-2021) and will be updated until the conference. The terms or and noise as well as synonyms and related terms were used in the search string. The search results in over 400 documents which were reduced based on their fit to the area of research interest and a practical screening. The overview gained by reviewing the literature indicates the most common noise sources with relation to tourism. Furthermore, several studies were found which analyse the consequences for locals and how they react to and deal with the noise. Some of the studies focused on measures taken on noise reduction like reducing the noise source itself, developing new methods to measure or visualize noise as well as structural measures. Based on this review, future research areas were identified.


2001 ◽  
Author(s):  
Tsutomu Oishi ◽  
Yoshiya Nakamura ◽  
Paul Strange

Author(s):  
Yutaka Ohta ◽  
Shunsuke Masui ◽  
Toshiya Fuyumuro ◽  
Eisuke Outa

Frequency-response characteristics of interaction tone noise radiated from a centrifugal compressor with vaned diffuser are discussed by experiments and also by noise transmission model. The interaction tone noise is supposed to be caused by the periodic pressure fluctuation in the vicinity of the leading edge of diffuser vanes, and to show the characteristics of dipole noise source, noise source characteristics in an ideal sense should increase in the 6th power against the flow velocity. Then the level discrepancy between the noise source and measured sound pressure level is considered to be affected simply by the frequency-response characteristics of the noise transmission passage which are predicted by introducing a one-dimensional linear wave model. In the model, leading edge of the diffuser vane is considered to be a noise source, and sound wave travels through the passages of main and splitter blades in the impeller, inducer and inlet duct as a plane wave. The modeled data is found satisfactorily to predict the response characteristics of the noise transmission passage. The noise source characteristics are also discussed by precise measurements of pressure fluctuation level within impeller passages.


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