Visually steerable sound beam forming system based on face tracking and speaker array

2004 ◽  
Author(s):  
H. Mizoguchi ◽  
Y. Tamai ◽  
K. Shinoda ◽  
S. Kagami ◽  
K. Nagasghima
Keyword(s):  
Face Tracking ◽  
Beam Forming ◽  
Sound Beam

Adaptive Beam-Forming Based on the Mutative Scale Chaos Optimization

2012 ◽  
Vol 588-589 ◽  
pp. 703-706
Author(s):  
Zhi Wei Zhang ◽  
Bo Wang ◽  
Zhi Gang Zhu
Keyword(s):  
Optimization Problem ◽  
Optimization Method ◽  
Beam Forming ◽  
Distribution Law ◽  
Sound Beam ◽  
Chaos Optimization ◽  
Vector Error ◽  
Doa Mismatch ◽  
Global Optimal ◽  
Signal Vector

In order to improve the SINR of the beam-former in the case of DOA mismatch, the paper raises the probability of constraint beam-forming algorithm based on mutative scale chaos optimization in connection with the worst performance of the best sound beam-forming algorithm. By introducing the probability constraints confidence interval and the signal vector error distribution law in the beam-forming, the constrained optimization problem is eventually turned into a nonlinear optimization problem. Then the global optimal weight is searched by the mutative scale chaos optimization method. Simulations have shown that the algorithm can significantly improve the SINR.

Virtual Earphone: Integration of Beam Forming by Speaker Array and Real-Time Visual Face Tracking

2003 ◽  
Vol 243-244 ◽  
pp. 117-122 ◽  
Author(s):  
Hiroshi Mizoguchi ◽  
Tomohiko Kanamori ◽  
Satoshi Kagami ◽  
Kazuyuki Hiraoka ◽  
Masaru Tanaka ◽  
...  
Keyword(s):  
Real Time ◽  
Face Tracking ◽  
Beam Forming

scholarly journals Acoustic Beam Forming Using Ultrasonic Transducers

2012 ◽  
Vol 4 ◽  
pp. 238-242
Author(s):  
Wen Kung Tseng
Keyword(s):  
Optimization Technique ◽  
Audio Signal ◽  
Beam Width ◽  
Side Lobe ◽  
Ultrasonic Transducers ◽  
Main Lobe ◽  
Beam Forming ◽  
Acoustic Beam ◽  
Sound Beam ◽  
Audible Sound

This paper evaluates the performance of acoustic beam forming using ultrasonic transducers. A directional audible sound can be generated by amplitude-modulating the ultrasound carrier with an audio signal, then transmitting it from an array of ultrasonic transducers. A novel method has been proposed in this paper to control the beam width of the main lobe and the level of the side lobe for the beam pattern by using an optimization technique. Furthermore, the weighting distribution of uniform linear array composed of eight transducers and the effect of different weightings on the spreading angle of the sound beam have been investigated through simulations in this study. The results show that the optimization method proposed in the paper can effectively control the beam width of the main lobe and the level of the side lobe for the audible sound.

Broadband Beam-Forming Circuit Using Microstrip Multilayer Couplers

2020 ◽  
Vol 10 (5) ◽  
pp. 295
Author(s):  
Aleksandr Ostankov ◽  
Nikita Shchetinin ◽  
Oleg Vyacheslavovich Chernoyarov ◽  
Serguei Pergamenchtchikov
Keyword(s):  
Beam Forming
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