Low‐frequency ambient ocean noise and sound transmission over a thinly sedimented rock bottom

1982 ◽  
Vol 71 (4) ◽  
pp. 863-870 ◽  
Author(s):  
R. D. Worley ◽  
R. A. Walker
Keyword(s):  
Low Frequency ◽  
Sound Transmission ◽  
Ocean Noise

Down‐slope enhancement models for low‐frequency ocean noise and propagation

1978 ◽  
Vol 64 (S1) ◽  
pp. S46-S46
Author(s):  
J. Northrop ◽  
R. A. Wagstaff
Keyword(s):  
Low Frequency ◽  
Ocean Noise

Sound transmission through triple plates separated by air cavities in the low-frequency range

2018 ◽  
Vol 230 (3) ◽  
pp. 965-977
Author(s):  
Akintoye Olumide Oyelade ◽  
Obanishola Mufutau Sadiq ◽  
Omotayo A. Fakinlede
Keyword(s):  
Low Frequency ◽  
Sound Transmission ◽  
Frequency Range ◽  
Air Cavities

Low frequency sound transmission through close-fitting finite sandwich panels

1998 ◽  
Vol 55 (1) ◽  
pp. 13-30 ◽  
Author(s):  
W.C Tang ◽  
H Zheng ◽  
C.F Ng
Keyword(s):  
Low Frequency ◽  
Sandwich Panels ◽  
Sound Transmission ◽  
Frequency Sound

scholarly journals Low-Frequency Broadband Sound Transmission Loss of Infinite Orthogonally Rib-Stiffened Sandwich Structure with Periodic Subwavelength Arrays of Shunted Piezoelectric Patches

2017 ◽  
Vol 2017 ◽  
pp. 1-17 ◽  
Author(s):  
Zhifu Zhang ◽  
Weiguang Zheng ◽  
Qibai Huang
Keyword(s):  
Sandwich Structure ◽  
Transmission Loss ◽  
Virtual Work ◽  
Low Frequency ◽  
Sound Transmission ◽  
Sound Insulation ◽  
Convergence Criterion ◽  
Sound Transmission Loss ◽  
Space Harmonic ◽  
Broadband Sound

This paper studies low-frequency sound transmission loss (STL) of an infinite orthogonally rib-stiffened sandwich structure flexibly connected with periodic subwavelength arrays of finite shunted piezoelectric patches. A complete theoretical model is proposed by three steps. First, the panels and piezoelectric patches on both sides are equivalent to two homogeneous facesheets by effective medium method. Second, we take into account all inertia terms of the rib-stiffeners to establish the governing equations by space harmonic method, separating the amplitude coefficients of the equivalent facesheets through virtual work principle. Third, the expression of STL is reduced. Based on the two prerequisites of subwavelength assumption and convergence criterion, the accuracy and validity of the model are verified by finite element simulations, cited experiments, and theoretical values. In the end, parameters affecting the STL performance of the structure are studied. All of these results show that the sandwich structure can improve the low-frequency STL effectively and broaden the sound insulation bandwidth.

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