scholarly journals Low frequency underwater sound propagation measurements west of the NOSC oceanographic tower

1979 ◽  
Vol 65 (S1) ◽  
pp. S16-S16
Author(s):  
J. Northrop ◽  
T. E. Stixrud
Keyword(s):  
Sound Propagation ◽  
Low Frequency ◽  
Underwater Sound

Response of the Lungs to Low Frequency Underwater Sound.

1994 ◽  
Author(s):  
Peter H. Rogers ◽  
Gary W. Caille ◽  
Thomas N. Lewis
Keyword(s):  
Low Frequency ◽  
Underwater Sound

Correlation between the fluctuations of underwater sound propagation and shelfbreak oceanography

2021 ◽  
Vol 150 (4) ◽  
pp. A157-A157
Author(s):  
Ying-Tsong Lin ◽  
Glen Gawarkiewicz ◽  
Andone C. Lavery ◽  
Weifeng G. Zhang ◽  
J Michael Jech ◽  
...  
Keyword(s):  
Sound Propagation ◽  
Underwater Sound

scholarly journals Spiral Sound Wave Transducer Based on the Longitudinal Vibration

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3674 ◽  
Author(s):  
Wei Lu ◽  
Yu Lan ◽  
Rongzhen Guo ◽  
Qicheng Zhang ◽  
Shichang Li ◽  
...  
Keyword(s):  
Sound Wave ◽  
Longitudinal Vibration ◽  
Three Dimensional ◽  
Low Frequency ◽  
Sound Field ◽  
Field Measurements ◽  
Sound Waves ◽  
Underwater Sound ◽  
Three Dimensional Finite Element ◽  
Wave Transducer

A spiral sound wave transducer comprised of longitudinal vibrating elements has been proposed. This transducer was made from eight uniform radial distributed longitudinal vibrating elements, which could effectively generate low frequency underwater acoustic spiral waves. We discuss the production theory of spiral sound waves, which could be synthesized by two orthogonal acoustic dipoles with a phase difference of 90 degrees. The excitation voltage distribution of the transducer for emitting a spiral sound wave and the measurement method for the transducer is given. Three-dimensional finite element modeling (FEM)of the transducer was established for simulating the vibration modes and the acoustic characteristics of the transducers. Further, we fabricated a spiral sound wave transducer based on our design and simulations. It was found that the resonance frequency of the transducer was 10.8 kHz and that the transmitting voltage resonance was 140.5 dB. The underwater sound field measurements demonstrate that our designed transducer based on the longitudinal elements could successfully generate spiral sound waves.

A study of the effects of ocean bottom roughness on low‐frequency sound propagation

1979 ◽  
Vol 65 (2) ◽  
pp. 381-386
Author(s):  
Steven R. Rutherford ◽  
Kenneth E. Hawker ◽  
Susan G. Payne
Keyword(s):  
Sound Propagation ◽  
Low Frequency ◽  
Ocean Bottom ◽  
Frequency Sound
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