Radiational characteristics of speaker directivity using active control
Chai-Bong Lee, Chang‐Young Lee · The Journal of the Korea institute of electronic communication sciences · 2012
In this paper, we constructed an array of speaker system with directivity by using FXLMS(Filtered-X LMS) algorithm and confirmed its directivity. The front 0° characteristics of the controlled speaker was suppressed by interfering it with the control signal produced with filter coefficients optimized with respect to the 180° characteristics of the rear speakers. The directivity of the array of rear speakers was measured and the damping effect of t he signal from the front speaker array was confirmed. The frequency characteristics and directivity was investigated by using the adaptive filter coefficients on damping, the damping on the control point was verified in all the frequency range. In 100Hz, 200Hz, 1000Hz regime, the damping effect was observed in the range of front 60°∼100°.