Individual sound image generation by null-space based sound field control under few loudspeakers in real environment

2016 ◽  
Vol 140 (4) ◽  
pp. 3057-3057
Author(s):  
Shinpei Horii ◽  
Yosuke Tatekura
Keyword(s):  
Null Space ◽  
Sound Field ◽  
Image Generation ◽  
Real Environment ◽  
Sound Image ◽  
Field Control

Interface for barge-in free spoken dialogue system using adaptive sound field control

2004 ◽  
Author(s):  
Tatsunori Asai ◽  
Shigeki Miyabe ◽  
Hiroshi Saruwatari ◽  
Kiyohiro Shikano
Keyword(s):  
Sound Field ◽  
Dialogue System ◽  
Spoken Dialogue ◽  
Spoken Dialogue System ◽  
Field Control

A conjugate gradient least square based method for sound field control

2021 ◽  
Vol 263 (5) ◽  
pp. 1029-1040
Author(s):  
Pierangelo Libianchi ◽  
Finn T. Agerkvist ◽  
Elena Shabalina
Keyword(s):  
Conjugate Gradient ◽  
Regularization Parameter ◽  
Sound Field ◽  
Least Square ◽  
Active Set ◽  
Noise Sources ◽  
Field Control ◽  
Ill Posed ◽  
The Right ◽  
Number Of Iterations

In sound field control, a set of control sources is used to match the pressure field generated by noise sources but with opposite phase to reduce the total sound pressure level in a defined area commonly referred to as dark zone. This is usually an ill-posed problem. The approach presented here employs a subspace iterative method where the number of iterations acts as the regularization parameter and controls unwanted side radiation, i.e. side lobes. More iterations lead to less regularization and more side lobes. The number of iterations is controlled by problem-specific stopping criteria. Simulations show the increase of lobing with increased number of iterations. The solutions are analysed through projections on the basis provided by the source strength modes corresponding to the right singular vector of the transfer function matrix. These projections show how higher order pressure modes (left singular vectors) become dominant with larger number of iterations. Furthermore, an active-set type method provides the constraints on the amplitude of the solution which is not possible with the conjugate gradient least square algorithm alone.

The study of sound field control using reproduction of plane‐wave sound

1996 ◽  
Vol 100 (4) ◽  
pp. 2697-2697
Author(s):  
Takeshi Miyahara ◽  
Hareo Hamada
Keyword(s):  
Plane Wave ◽  
Sound Field ◽  
Field Control
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