One‐dimensional sound field control by sound pressure and energy‐density sensor

1994 ◽  
Vol 96 (5) ◽  
pp. 3260-3260
Author(s):  
J. Warner Soditus ◽  
Jiri Tichy
Keyword(s):  
Energy Density ◽  
Sound Pressure ◽  
Sound Field ◽  
One Dimensional ◽  
Field Control

Equalization of a one‐dimensional sound field using acoustic energy density

2003 ◽  
Vol 114 (4) ◽  
pp. 2460-2460
Author(s):  
Xi Chen ◽  
Timothy Leishman ◽  
Scott Sommerfeldt
Keyword(s):  
Energy Density ◽  
Sound Field ◽  
Acoustic Energy ◽  
One Dimensional ◽  
Acoustic Energy Density

Experimental equalization of a one‐dimensional sound field using energy density and a parametric equalizer

2004 ◽  
Vol 116 (4) ◽  
pp. 2591-2591
Author(s):  
Micah Shepherd ◽  
Xi Chen ◽  
Timothy Leishman ◽  
Scott Sommerfeldt
Keyword(s):  
Energy Density ◽  
Sound Field ◽  
One Dimensional

Active control of the scattered radiation with a reflecting surface

2019 ◽  
Vol 67 (3) ◽  
pp. 190-196
Author(s):  
Ning Han
Keyword(s):  
Control System ◽  
Active Control ◽  
Scattered Radiation ◽  
Sound Pressure ◽  
Sound Field ◽  
Control Area ◽  
Mirror Image ◽  
Three Dimension ◽  
Control Effect ◽  
Reflecting Surface

Based on a prediction method of the scattered sound pressure, an active control system was proposed in previous work for the three-dimension scattered radiation, where all the relevant simulations and experiments were implemented in three-dimensional free sound field. However, for practical applications, such as the anti-eavesdropping system or the stealth system for submarines, the sound field conditions are usually complex, and the most common case is the one with reflecting surface. It is questionable whether the previous control system is still effective in non-free sound field, or what improvements should be operated to ensure the control effect. In this article, based on the mirror image principle, two methods of calculating the control source strengths are proposed for the scattered radiation control, and numerical simulations with one-channel and multi-channel system are implemented to detect the corresponding control effect. It is seen that the local active control for the scattered radiation is still effective, and the reduction of the sound pressure level as well as the control area is extended with the increasement of the error sensors and control sources.

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