Free‐field acoustic calibration of long underwater acoustic arrays in a closed tube

1988 ◽  
Vol 84 (S1) ◽  
pp. S31-S31
Author(s):  
L. D. Luker ◽  
J. F. Zalesak ◽  
C. K. Brown
Keyword(s):  
Free Field ◽  
Underwater Acoustic ◽  
Acoustic Arrays ◽  
Closed Tube ◽  
Acoustic Calibration

Detection and tracking of land vehicle activity by offshore underwater acoustic arrays

1997 ◽  
Vol 102 (5) ◽  
pp. 3193-3193
Author(s):  
Gerald L. D’Spain ◽  
Lewis P. Berger ◽  
William S. Hodgkiss ◽  
William A. Kuperman ◽  
LeRoy M. Dorman ◽  
...  
Keyword(s):  
Underwater Acoustic ◽  
Land Vehicle ◽  
Detection And Tracking ◽  
Acoustic Arrays ◽  
Vehicle Activity

scholarly journals The Reflection Coefficients Measurement Method for the Underwater Acoustic Materials Based on the Single Vector Hydrophone

2019 ◽  
Vol 37 (5) ◽  
pp. 1036-1043
Author(s):  
Shengguo Shi ◽  
Chao Wang ◽  
Bo Hu
Keyword(s):  
Measurement Method ◽  
Free Field ◽  
Pulse Signal ◽  
Measuring Method ◽  
High Ratio ◽  
Reflection Coefficients ◽  
Inverse Filtering ◽  
Post Processing ◽  
Underwater Acoustic ◽  
Vector Hydrophone

In order to obtain the normal acoustic reflection coefficients of underwater acoustic materials in the free field with the wideband pulse signal, a new measuring method with a single vector hydrophone and the post-processing inverse filtering is put forward. Numerical simulations had been conducted to comparatively analyze the measurement performances of the measuring method. The simulation results show that the present method should be established on the high ratio of signal to the noise and it is not sensitive to the system error. The experiment result shows that the post-processing inverse filtering measuring method is more effective comparing with the method without the post-processing inverse filtering, especially the measurement consequence of the post-processing inverse filtering measurement method tends to the theoretical value when the frequency is higher than 2.5 kHz, because limitation of the transducer.

Method for measuring the characteristics of underwater acoustic arrays in real environments

1994 ◽  
Vol 37 (1) ◽  
pp. 70-75
Author(s):  
S. V. Burenkov ◽  
N. I. Knyazeva ◽  
S. S. Naumov ◽  
E. A. Zenyutich
Keyword(s):  
Underwater Acoustic ◽  
Acoustic Arrays
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