隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)罩(zhao)(zhao)(zhao)(zhao)常用(yong)于小(xiao)型噪(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源，但(dan)一般機械設備在(zai)工藝上很(hen)難實現完全封(feng)閉(bi)，消(xiao)音(yin)降(jiang)噪(zao)(zao)(zao)工程施(shi)工，需(xu)考慮通(tong)風散熱，可設計為局(ju)部隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)罩(zhao)(zhao)(zhao)(zhao)。為避免隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)罩(zhao)(zhao)(zhao)(zhao)罩(zhao)(zhao)(zhao)(zhao)壁受聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源激發(fa)而產生共(gong)振，罩(zhao)(zhao)(zhao)(zhao)內壁與(yu)機械設備之間留有(you)空(kong)間，銅陵降(jiang)噪(zao)(zao)(zao)工程，距(ju)離不得小(xiao)于10cm。隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)就是(shi)采用(yong)密度(du)重的(de)材(cai)料制成構件(jian)加以(yi)阻擋(dang)或將噪(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)封(feng)閉(bi)在(zai)一個空(kong)間，使其與(yu)周圍(wei)空(kong)氣(qi)隔(ge)(ge)(ge)絕，消(xiao)音(yin)降(jiang)噪(zao)(zao)(zao)工程，隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)措施(shi)有(you)隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)間、隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)罩(zhao)(zhao)(zhao)(zhao)、隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏、隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)門和隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)窗，隔(ge)(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)只(zhi)對(dui)空(kong)氣(qi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)傳播(bo)有(you)效，而對(dui)固(gu)體導聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)無效。用(yong)一種能阻止(zhi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)音(yin)傳播(bo)而允許氣(qi)流通(tong)過的(de)裝(zhuang)置(zhi)，即消(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)。這是(shi)防止(zhi)空(kong)氣(qi)動(dong)力性(xing)噪(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)的(de)主要措施(shi)。

路(lu)面(mian)施工(gong)隔(ge)聲(sheng)(sheng)(sheng)墻(qiang)的(de)加固接(jie)縫(feng)設(she)置要(yao)求：隔(ge)音墻(qiang)基(ji)礎應(ying)按設(she)計要(yao)求采用伸(shen)縮縫(feng)施工(gong)。隔(ge)聲(sheng)(sheng)(sheng)墻(qiang)基(ji)每(mei)隔(ge)0～0米設(she)伸(shen)縮縫(feng)。具體伸(shen)縮縫(feng)的(de)位(wei)置應(ying)結(jie)(jie)合施工(gong)期間的(de)現場地形確定。吸聲(sheng)(sheng)(sheng)降噪是一種在(zai)傳(chuan)播(bo)途徑(jing)上(shang)控制噪聲(sheng)(sheng)(sheng)強度的(de)方法。物體的(de)吸聲(sheng)(sheng)(sheng)作用是普遍存(cun)在(zai)的(de)，吸聲(sheng)(sheng)(sheng)的(de)效果不(bu)僅與吸聲(sheng)(sheng)(sheng)材料有關，還(huan)與所選的(de)吸聲(sheng)(sheng)(sheng)結(jie)(jie)構有關。這種技術(shu)主(zhu)要(yao)用于室內空間。噪聲(sheng)(sheng)(sheng)對人體的(de)危害是全(quan)身性的(de)，既可(ke)以引起(qi)聽(ting)覺系(xi)統(tong)的(de)變(bian)化，也可(ke)以對非聽(ting)覺系(xi)統(tong)產生影響。這些影響的(de)早期主(zhu)要(yao)是生理(li)性改(gai)變(bian)，長期接(jie)觸比較強烈的(de)噪聲(sheng)(sheng)(sheng)，可(ke)以引起(qi)病(bing)理(li)性改(gai)變(bian)。

機(ji)械設備運轉產生(sheng)的(de)噪(zao)聲(sheng)(sheng)(sheng)其傳播方式(shi)有兩種(zhong)(zhong)：一(yi)種(zhong)(zhong)是(shi)聲(sheng)(sheng)(sheng)源(yuan)(yuan)激發固體構件振動，這種(zhong)(zhong)振動以(yi)彈(dan)性(xing)波的(de)形式(shi)，通過基礎、廠(chang)房地板(ban)(ban)、墻柱(zhu)、機(ji)組表面向外(wai)輻(fu)射(she)噪(zao)聲(sheng)(sheng)(sheng)，即固體聲(sheng)(sheng)(sheng)。聲(sheng)(sheng)(sheng)的(de)輻(fu)射(she)一(yi)般有指向性(xing)，處(chu)在(zai)與聲(sheng)(sheng)(sheng)源(yuan)(yuan)距離相同(tong)而方向不同(tong)的(de)地方，接收(shou)到的(de)聲(sheng)(sheng)(sheng)強度也就不同(tong)。不過多(duo)數聲(sheng)(sheng)(sheng)源(yuan)(yuan)以(yi)低頻輻(fu)射(she)噪(zao)聲(sheng)(sheng)(sheng)時，指向性(xing)很差；隨著頻率的(de)增加，隔(ge)音降噪(zao)工程報價，指向性(xing)就增強。室外(wai)使(shi)用聲(sheng)(sheng)(sheng)屏障時，可用磚墻、混凝土墻；室內使(shi)用時，可用鋼(gang)板(ban)(ban)、木板(ban)(ban)、塑料板(ban)(ban)、石(shi)膏(gao)板(ban)(ban)以(yi)及復合板(ban)(ban)等輕質材料。