Active acoustic control in gradient coils for MRI

2001 ◽  
Vol 46 (4) ◽  
pp. 807-818 ◽  
Author(s):  
P. Mansfield ◽  
B. Haywood ◽  
R. Coxon
Keyword(s):  
Gradient Coils ◽  
Acoustic Control ◽  
Active Acoustic Control

Active Acoustic Control of Sound Transmission through Double Walls: Simulation Results

2000 ◽  
Vol 7 (2) ◽  
pp. 127-135
Author(s):  
C. Bao ◽  
J. Pan
Keyword(s):  
Computer Simulation ◽  
Sound Transmission ◽  
Theoretical Framework ◽  
Control Mechanisms ◽  
Control Performance ◽  
Acoustic Control ◽  
Modal Density ◽  
Simulation Based ◽  
Analytical Work ◽  
Active Acoustic Control

In this paper, the active control of sound transmission through double-panel partitions by inserting acoustic sources in the air gap between the double panels is studied through a computer simulation. The work is an extension of the previous analytical work in which a theoretical framework was developed to reveal the control mechanisms involved in active acoustic control. In this work, a computer simulation based on the theoretical framework is used to assess the control performance under different conditions. It is shown that the property of the radiating panel plays an important role in active acoustic control. The control performance can be improved by increasing the panel damping or decreasing the panel modal density. The reasons for this are discussed.

scholarly journals Large area sensors for active acoustic control systems

1989 ◽  
Vol 85 (S1) ◽  
pp. S92-S92 ◽  
Author(s):  
Thomas R. Howarth ◽  
Xiaoqi Q. Bao ◽  
Vijay K. Vatadan ◽  
Vasundara V. Varadan
Keyword(s):  
Control Systems ◽  
Large Area ◽  
Acoustic Control ◽  
Active Acoustic Control

Active Acoustic Control of a Rocket Fairing Using Spatially Weighted Transducer Arrays

2001 ◽  
Vol 38 (1) ◽  
pp. 112-119 ◽  
Author(s):  
Steven A. Lane ◽  
Jonathan D. Kemp ◽  
Steven Griffin ◽  
Robert L. Clark
Keyword(s):  
Acoustic Control ◽  
Transducer Arrays ◽  
Active Acoustic Control

Model of a bilaminar actuator for active acoustic control systems

1990 ◽  
Vol 87 (3) ◽  
pp. 1350-1352 ◽  
Author(s):  
X.‐Q. Bao ◽  
V. K. Varadan ◽  
V. V. Varadan ◽  
T. R. Howarth
Keyword(s):  
Control Systems ◽  
Acoustic Control ◽  
Active Acoustic Control
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