Virtual sound screen
A virtual sound and barrier technology, applied in the field of virtual sound barrier, can solve the problems of poor low-frequency noise, weight and bulk of the sound insulation barrier, noise reduction, etc., and achieve good noise reduction effect, light weight and small size Effect
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[0016] The present invention will be described in detail below through examples:
[0017] Such as figure 2 As shown, the present invention includes three modules: an error microphone array 1, a secondary speaker array 2 and a controller 3. The controller 3 is connected to the error microphone array 1 and the secondary speaker array 2 to receive signals from the error microphone array 1 and control the output of the secondary speaker array 2.
[0018] The error microphone array 1 is distributed around the area to be controlled and surrounds the area 4 to be controlled. The error microphone array 1 can be placed in various shapes as long as it surrounds the control area 4. For example, it can be placed in a spherical or cylindrical shape. This example uses a cylindrical shape, such as figure 1 As shown, the 16 error microphones are divided into 2 layers, and 8 of each layer are evenly distributed on the ring. Distance between two layers h e Equal to circle radius r e . h e , R e T...
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