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分频用的电感直流电阻一般在0.4以下
0.4的电阻对灵敏度的影响是极小的,对阻尼的影响才重要.所以一般要求越低越好.
至于会不会降低灵敏度,就要看情况了.
如果只有一个电感(就是所谓的一阶),那么就纯粹是衰减的,如下图
<img src="attachments/dvbbs/2004-12/2004121313463759.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/2004-12/2004121313463759.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
如果有电感和电容(二阶),就会形成谐振,会使某频段声压高于原来,如下图
<img src="attachments/dvbbs/2004-12/20041213134727988.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/2004-12/20041213134727988.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> |
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