Sound propagation in street canyons: Comparison between diffusely and geometrically reflecting boundaries

2000 ◽  
Vol 107 (3) ◽  
pp. 1394-1404 ◽  
Author(s):  
Jian Kang
Keyword(s):  
Sound Propagation ◽  
Street Canyons ◽  
Reflecting Boundaries

scholarly journals Direct FVM Simulation for Sound Propagation in an Ideal Wedge

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Hongyu Ji ◽  
Xinhai Xu ◽  
Xiaowei Guo ◽  
Shuai Ye ◽  
Juan Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Sound Propagation ◽  
Computational Studies ◽  
Parallel Simulations ◽  
Computing Platform ◽  
Reflecting Boundaries ◽  
Volume Method ◽  
Performance Computing ◽  
The Ideal

The sound propagation in a wedge-shaped waveguide with perfectly reflecting boundaries is one of the few range-dependent problems with an analytical solution. This provides a benchmark for the theoretical and computational studies on the simulation of ocean acoustic applications. We present a direct finite volume method (FVM) simulation for the ideal wedge problem, and both time and frequency domain results are analyzed. We also study the broadband problem with large-scale parallel simulations. The results presented in this paper validate the accuracy of the numerical techniques and show that the direct FVM simulation could be applied to large-scale complex acoustic applications with a high performance computing platform.

scholarly journals A Hybrid Model for Investigating the Effect of Scattering from Building Façade on Sound Propagation in Street Canyons

2019 ◽  
Vol 9 (14) ◽  
pp. 2803 ◽  
Author(s):  
Boya Yu ◽  
Hui Ma ◽  
Jian Kang
Keyword(s):  
Sound Propagation ◽  
Reverberation Time ◽  
Street Canyons ◽  
Urban Street ◽  
Iterative Model ◽  
Urban Street Canyons ◽  
Energy Models ◽  
Model Combining ◽  
Modern Cities ◽  
Time Simulation

Street canyons are basic components of modern cities. Sound propagation in streets has been proven to be significantly affected by reflections from building façades. In this paper, an iterative model combining acoustic radiosity and the image source method (IMCRI) is proposed to investigate the effect of diffuse reflections on sound propagation in urban street canyons. By applying image patches, this model calculates both specular reflected components and diffuse reflected components in every reflection. The accuracy of this model is then validated with full-scale measured data from five actual streets with different scattering conditions. Good agreements of sound pressure level and reverberation time are found between the IMCRI and the measurements. The performance of the IMCRI is found to be superior to those of the existing energy models, especially for the reverberation time simulation.

Sound as a transverse wave

2017 ◽  
Vol 13 (1) ◽  
pp. 4522-4534
Author(s):  
Armando Tomás Canero
Keyword(s):  
Quantum Mechanics ◽  
Gravitational Waves ◽  
Longitudinal Wave ◽  
Transverse Wave ◽  
Sound Propagation ◽  
Correspondence Principle ◽  
Classical Mechanics ◽  
Wave Model ◽  
Scientific Experiments

This paper presents sound propagation based on a transverse wave model which does not collide with the interpretation of physical events based on the longitudinal wave model, but responds to the correspondence principle and allows interpreting a significant number of scientific experiments that do not follow the longitudinal wave model. Among the problems that are solved are: the interpretation of the location of nodes and antinodes in a Kundt tube of classical mechanics, the traslation of phonons in the vacuum interparticle of quantum mechanics and gravitational waves in relativistic mechanics.

Time-domain calculation of sound propagation in lined ducts with sheared flows

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 768-773 ◽  
Author(s):  
Yusuf Ozyoruk ◽  
Lyle N. Long
Keyword(s):  
Time Domain ◽  
Sound Propagation ◽  
Sheared Flows ◽  
Lined Ducts
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