隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)罩(zhao)(zhao)(zhao)常(chang)用于小型噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)，但一(yi)般機械(xie)設(she)備(bei)(bei)在工藝上(shang)很難實現(xian)完全(quan)封閉，需考慮(lv)通(tong)風(feng)散熱，可設(she)計(ji)為(wei)局部(bu)隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)罩(zhao)(zhao)(zhao)。為(wei)避免隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)罩(zhao)(zhao)(zhao)罩(zhao)(zhao)(zhao)壁受聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)激發而產生共振，冷卻塔(ta)降噪(zao)工程，罩(zhao)(zhao)(zhao)內(nei)壁與(yu)機械(xie)設(she)備(bei)(bei)之間留有空(kong)間，距離不得小于10cm。隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)就(jiu)是采(cai)用密度重的(de)材料制(zhi)成構件(jian)加以阻擋或將(jiang)噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)封閉在一(yi)個空(kong)間，使其與(yu)周(zhou)圍(wei)空(kong)氣隔(ge)絕，空(kong)氣能(neng)設(she)備(bei)(bei)降噪(zao)工程，隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)措施有隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)間、隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)罩(zhao)(zhao)(zhao)、隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏、隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)門和(he)隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)窗，隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)只對空(kong)氣聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)傳(chuan)播有效(xiao)，而對固體導聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)無(wu)效(xiao)。用一(yi)種(zhong)能(neng)阻止聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)音傳(chuan)播而允許氣流通(tong)過的(de)裝置，即(ji)消聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器。這是防止空(kong)氣動力性噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)的(de)主要措施。

采(cai)用(yong)(yong)(yong)吸(xi)聲(sheng)(sheng)(sheng)(sheng)材料(liao)裝飾在車(che)間的(de)(de)(de)內(nei)表面，如(ru)墻(qiang)(qiang)壁和屋頂，或者(zhe)在車(che)間內(nei)懸掛(gua)空(kong)間吸(xi)聲(sheng)(sheng)(sheng)(sheng)體(ti)(ti)，吸(xi)收輻射(she)和反射(she)聲(sheng)(sheng)(sheng)(sheng)能(neng)，使(shi)噪聲(sheng)(sheng)(sheng)(sheng)強度減(jian)低。降噪處理(li)措(cuo)施：消聲(sheng)(sheng)(sheng)(sheng)：使(shi)用(yong)(yong)(yong)消聲(sheng)(sheng)(sheng)(sheng)器降低空(kong)氣(qi)動(dong)力性(xing)噪聲(sheng)(sheng)(sheng)(sheng)，如(ru)各(ge)種(zhong)風(feng)(feng)機、空(kong)壓(ya)機排風(feng)(feng)口等(deng)進(jin)、排氣(qi)噪聲(sheng)(sheng)(sheng)(sheng)。提(ti)升墻(qiang)(qiang)體(ti)(ti)的(de)(de)(de)隔聲(sheng)(sheng)(sheng)(sheng)量，首先解決墻(qiang)(qiang)體(ti)(ti)自身的(de)(de)(de)不封閉，六安降噪工程，孔洞(dong)等(deng)問題，根(gen)據質量定(ding)律(lv)，通常墻(qiang)(qiang)體(ti)(ti)的(de)(de)(de)質量增大一半其隔聲(sheng)(sheng)(sheng)(sheng)量會增加6dB，但(dan)采(cai)用(yong)(yong)(yong)合(he)理(li)的(de)(de)(de)隔聲(sheng)(sheng)(sheng)(sheng)材料(liao)與結構則可(ke)以改(gai)變，使(shi)墻(qiang)(qiang)體(ti)(ti)隔聲(sheng)(sheng)(sheng)(sheng)性(xing)能(neng)獲得(de)大大提(ti)高。

機械設(she)備(bei)運轉產生的噪(zao)(zao)聲(sheng)其傳播方式有(you)兩種：一種是(shi)在(zai)空(kong)氣中(zhong)傳播，稱(cheng)為空(kong)氣聲(sheng)；另(ling)一種是(shi)聲(sheng)源激發固(gu)體構件(jian)振(zhen)動(dong)，這種振(zhen)動(dong)以彈(dan)(dan)性波的形式，通(tong)(tong)過基礎(chu)、廠房地板(ban)、墻柱、機組(zu)表(biao)面(mian)向外輻射噪(zao)(zao)聲(sheng)，即固(gu)體聲(sheng)。隔聲(sheng)門(men)(men)表(biao)面(mian)結構為鋼制，中(zhong)央(yang)空(kong)調降噪(zao)(zao)工程，設(she)置門(men)(men)檻，門(men)(men)體與門(men)(men)框、門(men)(men)鎖(suo)孔洞等均進行細節密封，門(men)(men)扇(shan)面(mian)密度大，整體質量高。一定要用彈(dan)(dan)性構件(jian)支撐或懸吊(diao)，同(tong)時注意需要分(fen)割的兩個(ge)空(kong)間之間，不能有(you)縫或孔相通(tong)(tong)。'漏(lou)氣'就要漏(lou)聲(sheng)，這是(shi)隔聲(sheng)的實際問(wen)題。