隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)：隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)所采用的(de)(de)(de)方法是將(jiang)噪聲(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)封閉起(qi)來(lai)，使噪聲(sheng)(sheng)(sheng)(sheng)(sheng)控(kong)制(zhi)在(zai)一(yi)個小的(de)(de)(de)空間內，這種隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)結構(gou)稱(cheng)為隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)罩。在(zai)聲(sheng)(sheng)(sheng)(sheng)(sheng)波遇到屏(ping)蔽物(wu)(wu)時，由于界面(mian)特性(xing)(xing)阻抗的(de)(de)(de)改變(bian)，入射聲(sheng)(sheng)(sheng)(sheng)(sheng)能(neng)的(de)(de)(de)一(yi)部分(fen)(fen)被反射，冷卻(que)塔降(jiang)噪，一(yi)部分(fen)(fen)被吸(xi)收，一(yi)部分(fen)(fen)聲(sheng)(sheng)(sheng)(sheng)(sheng)能(neng)透(tou)進屏(ping)蔽物(wu)(wu)繼(ji)續傳播。材料的(de)(de)(de)隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)性(xing)(xing)能(neng)可用透(tou)聲(sheng)(sheng)(sheng)(sheng)(sheng)系數來(lai)表(biao)示(shi)。透(tou)聲(sheng)(sheng)(sheng)(sheng)(sheng)系數越小，表(biao)示(shi)透(tou)進去的(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)能(neng)越少，材料的(de)(de)(de)隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)性(xing)(xing)能(neng)越好。材料的(de)(de)(de)隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)性(xing)(xing)能(neng)與隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)體的(de)(de)(de)結構(gou)、性(xing)(xing)質和入射聲(sheng)(sheng)(sheng)(sheng)(sheng)波的(de)(de)(de)頻率有(you)關。

隔(ge)(ge)聲(sheng)(sheng)防(fang)噪：它(ta)是(shi)利用圍護結(jie)構把(ba)聲(sheng)(sheng)音限(xian)制在隔(ge)(ge)聲(sheng)(sheng)間內，使聲(sheng)(sheng)波阻隔(ge)(ge)和(he)衰減，這樣(yang)隔(ge)(ge)聲(sheng)(sheng)間內的(de)噪聲(sheng)(sheng)雖然(ran)大，但外界噪聲(sheng)(sheng)則小多了。主要(yao)控(kong)制壓(ya)縮機(ji)及泵體噪聲(sheng)(sheng)，以及風(feng)機(ji)傳導噪聲(sheng)(sheng)。消(xiao)(xiao)聲(sheng)(sheng)措施：在中央空調機(ji)組進、出風(feng)口安裝(zhuang)進、出風(feng)消(xiao)(xiao)聲(sheng)(sheng)器(qi)，消(xiao)(xiao)聲(sheng)(sheng)器(qi)內安裝(zhuang)消(xiao)(xiao)聲(sheng)(sheng)尖片，達到消(xiao)(xiao)聲(sheng)(sheng)目的(de)。隔(ge)(ge)聲(sheng)(sheng)門設(she)(she)計(ji)：隔(ge)(ge)聲(sheng)(sheng)罩安裝(zhuang)后(hou)，為(wei)了便于(yu)檢查設(she)(she)備和(he)保養方(fang)便，在現(xian)隔(ge)(ge)聲(sheng)(sheng)罩一(yi)側適宜處設(she)(she)計(ji)安裝(zhuang)一(yi)樘(tang)隔(ge)(ge)聲(sheng)(sheng)門，其隔(ge)(ge)聲(sheng)(sheng)門需要(yao)根(gen)據現(xian)場決定，同時防(fang)止(zhi)噪聲(sheng)(sheng)向周邊(bian)輻射。

吸(xi)(xi)聲(sheng)(sheng)：當聲(sheng)(sheng)波(bo)入射(she)(she)到(dao)物(wu)體表(biao)(biao)面時，部分聲(sheng)(sheng)能(neng)(neng)(neng)要被物(wu)體吸(xi)(xi)收轉化為其(qi)他形式(shi)的(de)(de)能(neng)(neng)(neng)量，稱為吸(xi)(xi)聲(sheng)(sheng)。材(cai)料(liao)(liao)(liao)(liao)的(de)(de)吸(xi)(xi)聲(sheng)(sheng)性(xing)能(neng)(neng)(neng)用吸(xi)(xi)收系數來表(biao)(biao)示(shi)，吸(xi)(xi)聲(sheng)(sheng)系數越(yue)大，則表(biao)(biao)示(shi)材(cai)料(liao)(liao)(liao)(liao)的(de)(de)吸(xi)(xi)聲(sheng)(sheng)性(xing)能(neng)(neng)(neng)越(yue)好。材(cai)料(liao)(liao)(liao)(liao)的(de)(de)吸(xi)(xi)聲(sheng)(sheng)性(xing)能(neng)(neng)(neng)與材(cai)料(liao)(liao)(liao)(liao)的(de)(de)性(xing)質、結構和聲(sheng)(sheng)波(bo)的(de)(de)入射(she)(she)角度及聲(sheng)(sheng)波(bo)的(de)(de)頻率有關。多(duo)孔(kong)(kong)(kong)吸(xi)(xi)聲(sheng)(sheng)材(cai)料(liao)(liao)(liao)(liao)的(de)(de)吸(xi)(xi)聲(sheng)(sheng)機理是：材(cai)料(liao)(liao)(liao)(liao)內(nei)部有無數細小的(de)(de)相互貫通(tong)的(de)(de)孔(kong)(kong)(kong)洞，當聲(sheng)(sheng)波(bo)入射(she)(she)到(dao)這些材(cai)料(liao)(liao)(liao)(liao)的(de)(de)表(biao)(biao)面，進(jin)而(er)入射(she)(she)到(dao)這些細小的(de)(de)孔(kong)(kong)(kong)隙(xi)內(nei)時，要引起孔(kong)(kong)(kong)隙(xi)內(nei)的(de)(de)空氣(qi)(qi)運(yun)(yun)動，緊靠孔(kong)(kong)(kong)壁和纖(xian)維(wei)表(biao)(biao)面的(de)(de)空氣(qi)(qi)，因摩擦和粘(zhan)滯(zhi)運(yun)(yun)動阻力而(er)不易運(yun)(yun)動，使聲(sheng)(sheng)能(neng)(neng)(neng)轉化為熱能(neng)(neng)(neng)而(er)消耗掉。故性(xing)能(neng)(neng)(neng)良好的(de)(de)吸(xi)(xi)聲(sheng)(sheng)材(cai)料(liao)(liao)(liao)(liao)要多(duo)孔(kong)(kong)(kong)，孔(kong)(kong)(kong)與孔(kong)(kong)(kong)之(zhi)間互相貫通(tong)，并且貫通(tong)的(de)(de)孔(kong)(kong)(kong)洞要與外界(jie)連(lian)通(tong)，使聲(sheng)(sheng)波(bo)能(neng)(neng)(neng)進(jin)入材(cai)料(liao)(liao)(liao)(liao)內(nei)部。