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如果是这样 和一个喇叭不是一样?
以下是引用参议会在2004-11-1 23:49:00的发言:
<img src="attachments/dvbbs/2004-11/200411123412786.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-11/200411123412786.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
偶极式音箱,由于左右喇叭相位相反,在音箱两侧声波抵消,实现音箱的“隐形”。或者用发烧的说法就是“点声源”
除了阻尼 |
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