请教梦版和钳版

QALOU

你们好，请教一问题————
———在倒相音箱设计中，计算出倒相管（如圆柱形）的尺寸后，如果想分解作成两根倒相管的，那么这根两倒相管的直径是否为设计计算的倒相管直径的一半？长度呢？与设计计算一根的长度一样长吗？在声音效果上会有什么不同吗？

zhang3

<img src="attachments/dvbbs/2005-3/200531721201178.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/2005-3/200531721201178.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2005-3/2005317212012930.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/2005-3/2005317212012930.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
[em11]

zhang3

声导管（倒相管）截面如果是矩形的话，一般来说，长边不应大于2倍短边。[em11]

zhang3

记忆中应该是
两倒相管的截面积的和＝原来的截面积
长度不变。。
[em11]