| 摘要 |
<p>A surround sound beam-forming system uses the overlapping portion of driver frequency ranges to provide a low-cost alternative to present external surround array systems. The overlapping frequency range of a pair of speaker drivers, generally a low-frequency and a high- frequency driver, is supplied with a surround channel information in a controlled phase relationship such that the surround channel information is propagated in a directivity pattern substantially differing from that of main channel information supplied to the low and high frequency drivers. The main channel information is generally directed at a listening area, while the surround channel information is directed away from the listening area so that the surround channel information is heard as a diffuse reflected field. An electronic network provides for control of the surround channel phase relationship and combining of main and surround signals via either an active or passive circuit.</p> |
