Local active control of diffracted diffuse sound fields

1995 ◽  
Vol 98 (2) ◽  
pp. 1017-1024 ◽  
Author(s):  
J. Garcia‐Bonito ◽  
S. J. Elliott
Keyword(s):  
Active Control ◽  
Sound Fields

Actively Silencing a Cavity by Acoustic Impedance Changes

1997 ◽  
Author(s):  
O. Lacour ◽  
D. Thenail ◽  
M. A. Galland
Keyword(s):  
Active Control ◽  
Acoustic Impedance ◽  
Fluid Structure Interaction ◽  
Central Point ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Sound Fields ◽  
Source Radiation ◽  
Absorbed Power

Abstract We attempt here the active control of enclosed sound fields via wall impedance changes. The impedance value which is the most efficient in silencing a cavity is the central point of this paper. Simulations and experiments show that the optimal impedance is not necessarily characterized by an large amount of absorbed power. Its silencing effect depends also on its ability to reduce source radiation. Experiments including fluid-structure interaction are also presented.

Adaptive active control of sound fields in elastic cylinders via vibrational inputs

AIAA Journal ◽  
1991 ◽  
Vol 29 (10) ◽  
pp. 1552-1561 ◽  
Author(s):  
D. S. Mandic ◽  
J. D. Jones
Keyword(s):  
Active Control ◽  
Sound Fields ◽  
Elastic Cylinders

Active control of stationary random sound fields

1990 ◽  
Vol 87 (3) ◽  
pp. 963-975 ◽  
Author(s):  
P. A. Nelson ◽  
J. K. Hammond ◽  
P. Joseph ◽  
S. J. Elliott
Keyword(s):  
Active Control ◽  
Sound Fields
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