近jin來lai，電dian子zi設she備bei越yue來lai越yue來lai多duo地di充chong斥chi於yu我wo們men的de日ri常chang生sheng活huo中zhong。這zhe些xie電dian子zi設she備bei中zhong使shi用yong的de是shi數shu字zi電dian路lu，而er當dang高gao頻pin電dian流liu通tong過guo電dian路lu板ban或huo走zou線xian時shi
，這zhe條tiao路lu徑jing便bian成cheng了le向xiang外wai輻fu射she噪zao聲sheng的de天tian線xian。當dang附fu近jin有you其qi他ta電dian子zi設she備bei時shi，此ci電dian波bo就jiu會hui幹gan擾rao到dao其qi他ta電dian子zi設she備bei的de正zheng常chang工gong作zuo。舉ju個ge例li子zi，在zai收shou音yin機ji旁pang放fang有you電dian腦nao時shi，收shou音yin機ji的de音yin頻pin會hui混hun入ru雜za音yin。這zhe就jiu是shi電dian腦nao的de數shu字zi電dian路lu中zhong發fa出chu的de噪zao聲sheng，幹gan擾rao了le收shou音yin機ji的de接jie收shou天tian線xian而er產chan生sheng噪zao音yin。當dang嚴yan重zhong的de噪zao聲sheng進jin入ru數shu字zi電dian路lu時shi，會hui造zao成cheng數shu字zi信xin號hao失shi真zhen，甚shen至zhi導dao致zhi數shu字zi電dian路lu發fa生sheng故gu障zhang。噪zao聲sheng的de傳chuan播bo不bu僅jin限xian於yu由you空kong間jian傳chuan遞di電dian波bo，還hai會hui通tong過guo電dian源yuan線xian等deng傳chuan遞di給gei連lian接jie的de設she備bei。

 

噪聲幹擾產生的條件是？

 

 

如何解決噪聲問題
？

 

要解決噪聲問題有2種方法。一種是抑製噪聲源的設備發射噪聲
，稱為輻射對策。另一種是防止設備受噪聲影響或導致故障，叫做抗擾對策。"抗擾"有"免疫"deyisi。hebinglishangdemianyiyiyang
，tashizhiduizaoshengdemianyi
，jishoudaozaoshengyingxiangyebuhuichanshengrenhewentideduice。fusheduicehekangraoduiceliangzhehezaiyiqijiujiaozuoEMC（Electro Magnetic Compatibility：電磁兼容）對策。

 

靜噪對策的兩大根本

 

 

chuleteshuqingkuangzhiwai，zhiyaokeyijiejuefusheduicehekangraoduiceqizhongzhiyi，zaoshengwentibiankededaojiejue。fusheduiceshizhenduizaoshengweizhiheleixingyizhideqingkuangercaiqudecuoshi，erkangraoduicezeshiyibuzhidaozaoshengshicongnalihezenyangjinrudeqingkuangweiqianti
，yincixiangbifusheduicelaishuonandugenggao。weici，rujinshimianshangzhezhongyifusheduiceweijiejuezaoshengwentidezhongdian。geguoweilejiejuezaoshengwentiershelilebiaozhun，duiyidingshuzhiyishangdedianbohechuanbozaoshengjinxinglexianzhi。（對部分的抗擾性也有所要求）

 

像上文中介紹的一樣，EMI濾波器就是為了防止電磁幹擾（EMI）而采取輻射對策和抗擾對策時實際使用的電子元件。