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1. 发明授权

US5068897A Mobile acoustic reproducing apparatus 失效
标题翻译：移动声学再现装置
公开(公告)号：US5068897A
公开(公告)日：1991-11-26
申请号：US514833
申请日：1990-04-26
申请人： Toshitaka Yamato , Tatsuo Ito , Atsuyuki Takashima , Akira Motojima
发明人： Toshitaka Yamato , Tatsuo Ito , Atsuyuki Takashima , Akira Motojima
IPC分类号： H04S1/00 , B60R11/02 , H04R5/02 , H04S5/02
CPC分类号： H04S5/005 , H04R2499/13
摘要： A center loudspeaker is disposed near the middle between the left channel loudspeaker arranged at the front left side of the compartment and the right channel loudspeaker at the front right side, and this center loudspeaker transforms into a sound by the level-controlled signal of the sum of the acoustic signals of the right and left channels, and phase- and level-controlled signals of the acoustic signals of the right and left channels. As a result, the sound field is localized in the front of the listener, and right and left symmetrical wide-spread sound fields may be composed. Additionally, tweeters are disposed outside the right and left channel loudspeakers, and the mounting angles of the tweeters are adjusted so that the sounds released from the tweeters may be at an equal sound pressure level between the listener at the driver's seat and the listener at the front side seat. As a result, the drift of the sound field in the medium and high sound ranges may be eliminated in a simple structure, and right and left symmetrical wide-spread sound field are composed. Furthermore, corresponding to the opening or closing state of the window glass or seated position, by controlling the phase and level of the sounds released from the loudspeakers and the tweeters, sound fields always symmetrical to the listening position and spread widely may be composed.
摘要翻译：中央扬声器设置在布置在隔间前左侧的左声道扬声器和右前侧右声道扬声器之间的中间附近，该中置扬声器通过总和的电平控制信号转换为声音右声道和左声道的声信号以及右声道和左声道的声信号的相位和电平控制信号。结果，声场被定位在收听者的前面，并且可以组成右和左对称的宽幅声场。另外，高音扬声器被设置在右声道和左声道扬声器之外，并且调节高音扬声器的安装角度，使得从高音扬声器释放的声音在驾驶员座位的听众和听众之间的声压级可以相等前排座椅结果，可以以简单的结构消除中等和高声音范围内的声场的漂移，并且组成右和左对称的宽扩展声场。此外，通过控制从扬声器和高音扬声器释放的声音的相位和电平，对应于窗玻璃的开启或关闭状态或就座位置，可以组合总是与收听位置对称的扩展声音。

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