| 摘要 |
<p>A system for actively reducing sound from a primary noise source, such as traffic noise, comprising:
a loudspeaker connector for connecting to at least one loudspeaker for generating anti-sound for reducing said noisy sound;a microphone connector for connecting to at least a first microphone placed adjacent to said loudspeaker; a control unit coupled to said first microphone connector, for providing an error signal, based on the output of said first microphone; and
a control unit for outputting a signal to said loudspeaker connector, for controlling said loudspeaker based on said error signal of said control unit. According to the invention, said control unit is provided with a processor adapted to provide said error signal as a simulated error signal of a virtual microphone placed in the far-field of the loudspeaker. In this way a better noise suppression in the far-field can be achieved.</p> |
