Measurement of atmospheric sound propagation and meteorological parameters to support development of an acoustic propagation model

2016 ◽  
Vol 140 (4) ◽  
pp. 3260-3260
Author(s):  
Melissa A. Hall ◽  
Teresa Ryan ◽  
Seth Hubbard ◽  
Joseph F. Vignola ◽  
John A. Judge ◽  
...  
Keyword(s):  
Meteorological Parameters ◽  
Sound Propagation ◽  
Acoustic Propagation ◽  
Propagation Model

Flow-dependent modeling of acoustic propagation based on DG-FEM method

2021 ◽  
Author(s):  
Zichen Wang ◽  
Jian Xu ◽  
Xuefeng Zhang ◽  
Can Lu ◽  
Kangkang Jin ◽  
...  
Keyword(s):  
Sound Propagation ◽  
Transmission Loss ◽  
Acoustic Propagation ◽  
Water Area ◽  
Current Speed ◽  
Propagation Model ◽  
Propagation Loss ◽  
Two Dimensional ◽  
Underwater Sound ◽  
Ocean Environment

AbstractThis paper proposes a two-dimensional underwater sound propagation model using the Discontinuous Galerkin Finite Element Method (DG-FEM) to investigate the influence of current on sound propagation. The acoustic field is calculated by the convected wave equation with the current speed parameter. Based on the current speed data from an assimilation model, a two-dimensional coupled acoustic propagation model in the Fram Strait water area is established to observe the variability in propagation loss under different seasonal velocities in the real ocean environment. The transmission loss and signal time structure are examined. The results obtained in different source frequencies are also compared. It appears that the current velocity, time and range variation all have an effect on underwater sound propagation.

Modeled acoustic propagation through a measured large-amplitude nonlinear internal wave in northern South China Sea

2020 ◽  
Author(s):  
Peng Qi
Keyword(s):  
South China Sea ◽  
Internal Waves ◽  
South China ◽  
Large Amplitude ◽  
Sound Propagation ◽  
Transmission Loss ◽  
Northern South China Sea ◽  
Acoustic Propagation ◽  
Propagation Model ◽  
China Sea

<p>Preliminary results are presented from an analysis of modeled mid-frequency sound propagation through a measured large-amplitude nonlinear internal solitary wave, and in-situ measurements of trains of nonlinear internal waves in northern South China Sea (SCS) as well. An acoustic propagation model based on ray theory was utilized to compute the transmission loss (TL) associated with passing the large depression measured internal waves. The TL was computed using the model considering (1) range-dependent and range-independent environmental scenario and (2) for different source and receiver depth configurations. This presentation will propose several interesting aspects of influence of internal waves on acoustic propagation, including "shadow zones", with or without eddy, etc.</p>

Horizontal multipath in transoceanic acoustic propagation: Model results and data.

1991 ◽  
Vol 90 (4) ◽  
pp. 2347-2347
Author(s):  
B. E. McDonald ◽  
W. A. Kuperman ◽  
K. Heaney
Keyword(s):  
Acoustic Propagation ◽  
Propagation Model

ON THE ADIABATICITY OF ACOUSTIC PROPAGATION THROUGH NONGRADUAL OCEAN STRUCTURES

2001 ◽  
Vol 09 (02) ◽  
pp. 359-365 ◽  
Author(s):  
E. C. SHANG ◽  
Y. Y. WANG ◽  
T. F. GAO
Keyword(s):  
Inverse Problem ◽  
Shallow Water ◽  
Acoustic Field ◽  
Solitary Waves ◽  
Sound Propagation ◽  
Acoustic Propagation ◽  
Forward Problem ◽  
Internal Solitary Waves ◽  
New Criterion

To assess the adiabaticity of sound propagation in the ocean is very important for acoustic field calculating (forward problem) and tomographic retrieving(inverse problem). Most of the criterion in the literature is too restrictive, specially for the nongradual ocean structures. A new criterion of adiabaticity is suggested in this paper. It works for nongradual ocean structures such as front and internal solitary waves in shallow-water.

Validation of a finite-difference acoustic propagation model of transcranial ultrasound

2012 ◽  
Vol 132 (3) ◽  
pp. 1927-1927
Author(s):  
Guillaume Bouchoux ◽  
Kenneth B. Bader ◽  
Joseph J. Korfhagen ◽  
Jason L. Raymond ◽  
Shivashankar Ravishankar ◽  
...  
Keyword(s):  
Finite Difference ◽  
Acoustic Propagation ◽  
Propagation Model ◽  
Transcranial Ultrasound

Influence of short‐term variations of meteorological parameters on sound propagation outdoors

2006 ◽  
Vol 120 (5) ◽  
pp. 3335-3335
Author(s):  
Philippe Blanc‐Benon ◽  
Benjamin Cotte ◽  
Benoit Gauvreau ◽  
Michel Berengier
Keyword(s):  
Meteorological Parameters ◽  
Sound Propagation ◽  
Short Term

Finite-Element Analysis of Effect of Wide-Base Tire on Tire-Pavement Noise

2013 ◽  
Vol 723 ◽  
pp. 105-112 ◽  
Author(s):  
Jia Sheng Yang ◽  
Tien Fang Fwa ◽  
Ghim Ping Ong ◽  
Chye Heng Chew
Keyword(s):  
Finite Element ◽  
Sound Propagation ◽  
Near Field ◽  
Interaction Model ◽  
Past Research ◽  
Propagation Model ◽  
Computer Simulation Model ◽  
Element Analysis ◽  
Noticeable Effect ◽  
Pavement Noise

This paper investigates the effect of tire width to tire-pavement noise. A tire-pavement noise numerical model in the near field has been developed using the three-dimensional finite-element method, and performed in the standard FEM code package ADINA. The model is composed of two main components: a rolling tire pavement interaction model and a sound propagation model. The tire width studied ranged from 180 to 210 mm. The computer simulation model was calibrated and validated using experimental results made available from past research. From the simulation results, it was found that tire width has a noticeable effect on tire-pavement noise. In particular, it was found that tires with wider base were found to produce higher noise levels.

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