工(gong)業(ye)離心(xin)通風機噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)產生的原(yuan)因有哪些？1、工(gong)業(ye)離心(xin)通風機因空氣(qi)(qi)動(dong)(dong)力所(suo)產生的噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng);2、由于機械振(zhen)(zhen)動(dong)(dong)所(suo)產生的噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng);3、兩者相互作(zuo)用所(suo)產生的噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng);其中(zhong)一般(ban)是空氣(qi)(qi)動(dong)(dong)力性(xing)(xing)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)占主要部分，機械性(xing)(xing)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)較(jiao)小，電磁(ci)性(xing)(xing)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)則更為(wei)微弱。空氣(qi)(qi)動(dong)(dong)力性(xing)(xing)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)沖擊噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)葉(xie)(xie)輪高(gao)(gao)(gao)速旋轉時，葉(xie)(xie)片作(zuo)周(zhou)期性(xing)(xing)運動(dong)(dong)，空氣(qi)(qi)質點受到周(zhou)期性(xing)(xing)力的作(zuo)用，其沖擊壓力波產生振(zhen)(zhen)動(dong)(dong)，形成噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)并以聲(sheng)(sheng)(sheng)(sheng)(sheng)速傳(chuan)播。這種(zhong)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)隨著葉(xie)(xie)片幾何形狀和尺(chi)寸的變化，噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)強度(du)也不同。若葉(xie)(xie)輪旋轉速度(du)為(wei)n(rps)，當葉(xie)(xie)片數為(wei)z時其基本頻(pin)率Fc由下公式確定：Fc=nz，Hz壓力愈高(gao)(gao)(gao)，葉(xie)(xie)輪的圓周(zhou)速度(du)愈高(gao)(gao)(gao)，噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)則愈大(da)。

噪(zao)(zao)(zao)(zao)聲(sheng)對人的(de)(de)(de)影響1、強(qiang)度(du)為130dB以(yi)下的(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)短(duan)時間(jian)作用主要是干(gan)擾人的(de)(de)(de)工(gong)作、休息和(he)言(yan)語通訊。2、130dB以(yi)上(shang)(shang)的(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)可(ke)引起耳(er)痛和(he)鼓(gu)膜傷害(hai)等(deng)；3、165dB以(yi)上(shang)(shang)的(de)(de)(de)強(qiang)烈噪(zao)(zao)(zao)(zao)聲(sheng)能使耳(er)鼓(gu)膜穿孔外，還可(ke)導致機體的(de)(de)(de)其他傷害(hai)。4、長(chang)時間(jian)職業性(xing)暴(bao)露(lu)在(zai)85～90dB以(yi)上(shang)(shang)噪(zao)(zao)(zao)(zao)聲(sheng)中可(ke)使工(gong)人產生言(yan)語聽(ting)力(li)損(sun)(sun)傷。此外，還可(ke)引起神經紊亂如睡眠(mian)不良，電(dian)梯(ti)降噪(zao)(zao)(zao)(zao)隔音，頭1痛耳(er)1鳴以(yi)及心1血管功能障礙等(deng)。5、當在(zai)110dB以(yi)上(shang)(shang)的(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)中即(ji)便不太長(chang)時間(jian)的(de)(de)(de)暴(bao)露(lu)，對于某(mou)些人有(you)時也會(hui)造成永1久性(xing)的(de)(de)(de)聽(ting)力(li)損(sun)(sun)傷。

如(ru)何(he)控制生(sheng)產性噪(zao)聲(sheng)？（1）消除或降低(di)生(sheng)源的噪(zao)聲(sheng)，使其降低(di)到噪(zao)聲(sheng)衛(wei)生(sheng)標準。（2）消除或減少噪(zao)聲(sheng)傳(chuan)(chuan)(chuan)播(bo)，從傳(chuan)(chuan)(chuan)播(bo)途徑(jing)上控制噪(zao)聲(sheng)，主要是阻(zu)斷和屏蔽聲(sheng)波的傳(chuan)(chuan)(chuan)播(bo)。具體措(cuo)施(shi)有(you)：總體設(she)(she)計布局要合理，強(qiang)(qiang)噪(zao)聲(sheng)車(che)間(jian)要與一(yi)般車(che)間(jian)以(yi)及(ji)職工生(sheng)活區(qu)分開(kai)；車(che)間(jian)內強(qiang)(qiang)噪(zao)聲(sheng)設(she)(she)備與一(yi)般生(sheng)產設(she)(she)備分開(kai)；利用屏蔽阻(zu)止噪(zao)聲(sheng)傳(chuan)(chuan)(chuan)播(bo)，如(ru)隔聲(sheng)罩(zhao)、隔聲(sheng)板、隔聲(sheng)墻等隔離噪(zao)聲(sheng)源。強(qiang)(qiang)噪(zao)聲(sheng)作業(ye)場(chang)所要設(she)(she)置隔聲(sheng)屏；吸(xi)聲(sheng)措(cuo)施(shi)，利用吸(xi)聲(sheng)材(cai)料裝飾車(che)間(jian)墻壁或懸掛在(zai)車(che)間(jian)里，以(yi)吸(xi)收聲(sheng)能；隔振措(cuo)施(shi)。