消(xiao)聲(sheng)實(shi)驗(yan)室(shi)簡(jian)介(jie)：

在(zai)聲(sheng)學(xue)噪(zao)聲(sheng)測(ce)試(shi)過(guo)程(cheng)中(zhong)，可(ke)以(yi)生(sheng)成(cheng)標(biao)準(zhun)的(di)的(di)聲(sheng)學(xue)測(ce)試(shi)環(huan)境(jing)，即(ji)聲(sheng)學(xue)自(zi)由(you)場(chang)空(kong)間(jian)。聲(sheng)學(xue)自(zi)由(you)場(chang)空(kong)間(jian)是(shi)一(yi)個(ge)隻(zhi)有(you)直(zhi)達(da)聲(sheng)而(er)沒(mo)有(you)反(fan)射(she)聲(sheng)的(di)聲(sheng)場(chang)，對(dui)於(yu)測(ce)試(shi)研(yan)究(jiu)電(dian)聲(sheng)元(yuan)器(qi)件(jian)產(chan)品(pin)的(di)噪(zao)聲(sheng)性(xing)能(neng)，具(ju)有(you)不(bu)可(ke)缺(que)少(shao)的(di)作(zuo)用(yong)。在(zai)使(shi)用(yong)範(fan)圍(wei)，消(xiao)聲(sheng)實(shi)驗(yan)室(shi)已(yi)經(jing)廣(guang)泛(fan)應(ying)用(yong)於(yu)各(ge)種(zhong)電(dian)聲(sheng)器(qi)件(jian)和(hu)電(dian)聲(sheng)產(chan)品(pin)的(di)聲(sheng)學(xue)噪(zao)聲(sheng)性(xing)能(neng)的(di)測(ce)試(shi)，電(dian)聲(sheng)測(ce)量(liang)儀(yi)器(qi)的(di)計(ji)量(liang)校(jiao)準(zhun)和(hu)測(ce)試(shi)，機(ji)電(dian)產(chan)品(pin)的(di)噪(zao)聲(sheng)源(yuan)聲(sheng)功(gong)率(shuai)級(ji)的(di)精(jing)密(mi)測(ce)試(shi)以(yi)及(ji)聲(sheng)學(xue)研(yan)究(jiu)等(deng)。

消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)測(ce)試(shi)精(jing)密(mi)度(duo)設(she)計(ji)：

消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)測(ce)試(shi)精(jing)密(mi)度(duo)主(zhu)要(yao)體(ti)現(xian)在(zai)聲(sheng)學(xue)自(zi)由(you)場(chang)空(kong)間(jian)和(hu)本(ben)底(di)噪(zao)聲(sheng)的(di)設(she)計(ji)上(shang)。

消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)聲(sheng)學(xue)自(zi)由(you)場(chang)空(kong)間(jian)設(she)計(ji)，分(fen)別(bie)由(you)聲(sheng)學(xue)頻(pin)率(shuai)範(fan)圍(wei)和(hu)空(kong)間(jian)範(fan)圍(wei)組(zu)成(cheng)，需(xu)要(yao)根(gen)據(ju)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)建(jian)造(zao)需(xu)求(qiu)來(lai)確(que)定(ding)，最(zui)終(zhong)從(zong)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)設(she)計(ji)方(fang)案(an)中(zhong)得(dei)出(chu)。

消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)本(ben)底(di)噪(zao)聲(sheng)設(she)計(ji)，需(xu)要(yao)在(zai)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)內(nei)部(bu)測(ce)試(shi)空(kong)間(jian)內(nei)選(xuan)擇(ze)幾(ji)個(ge)測(ce)試(shi)點(dian)，使(shi)用(yong)噪(zao)聲(sheng)測(ce)試(shi)儀(yi)器(qi)分(fen)別(bie)對(dui)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)內(nei)部(bu)進(jin)行(hang)噪(zao)聲(sheng)測(ce)試(shi)，通(tong)常(chang)聲(sheng)學(xue)計(ji)算(suan)後(hou)，得(dei)出(chu)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)內(nei)應(ying)具(ju)有(you)的(di)本(ben)底(di)噪(zao)聲(sheng)值(zhi)。

消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)製(zhi)作(zuo)標(biao)準(zhun):

建(jian)造(zao)設(she)計(ji)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)需(xu)要(yao)依(yi)據(ju)國(guo)際(ji)標(biao)準(zhun)ISO3745《Acoustics-Determination of sound power levels of nosie sources——Precision methods for anechoic and  semi-anechoic romms》和(hu)標(biao)準(zhun)GB6882《聲(sheng)學(xue)：噪(zao)聲(sheng)源(yuan)聲(sheng)功(gong)率(shuai)的(di)測(ce)定(ding)：消(xiao)聲(sheng)室(shi)和(hu)半(ban)消(xiao)聲(sheng)室(shi)精(jing)密(mi)法(fa)》設(she)計(ji)，並(bing)同(tong)時(shi)滿(man)足(ju)ISO 7779設(she)備(bei)空(kong)氣(qi)噪(zao)聲(sheng)測(ce)試(shi)標(biao)準(zhun)要(yao)求(qiu)。確(que)保(bao)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)能(neng)夠(gou)滿(man)足(ju)噪(zao)聲(sheng)測(ce)試(shi)所(suo)需(xu)要(yao)的(di)本(ben)底(di)噪(zao)聲(sheng)標(biao)準(zhun)。

消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)聲(sheng)學(xue)消(xiao)音(yin)結(jie)構(gou)特(te)點(dian)：

1、消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)牆(qiang)體(ti)采(cai)用(yong)新(xin)型(xing)複(fu)合(ge)層(ceng)隔(ge)聲(sheng)吸(xi)音(yin)牆(qiang)體(ti)結(jie)構(gou)，提(ti)高(gao)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)對(dui)外(wai)界(jie)環(huan)境(jing)的(di)噪(zao)音(yin)隔(ge)聲(sheng)能(neng)力(li)，避(bi)免(wen)噪(zao)聲(sheng)測(ce)試(shi)結(jie)果(guo)受(shou)到(dao)幹(gan)擾(rao)。

2、消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)隔(ge)振(zhen)減(jian)振(zhen)結(jie)構(gou)除(chu)采(cai)用(yong)基(ji)礎(chu)隔(ge)振(zhen)器(qi)以(yi)外(wai)，還(huan)采(cai)用(yong)隔(ge)振(zhen)溝(gou)結(jie)構(gou)，阻(zu)斷(duan)來(lai)自(zi)地(de)麵(mian)的(di)振(zhen)動(dong)波(bo)，防(fang)止(zhi)固(gu)體(ti)間(jian)的(di)接(jie)觸(chu)性(xing)噪(zao)音(yin)傳(zhuan)播(bo)，而(er)降(xiang)低(di)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)噪(zao)音(yin)消(xiao)聲(sheng)能(neng)力(li)。 

3、消(xiao)聲(sheng)實(shi)驗(yan)室(shi)與(yu)外(wai)界(jie)線(xian)路(lu)連(lian)接(jie)，采(cai)用(yong)過(guo)線(xian)孔(kong)將(qiang)外(wai)部(bu)新(xin)號(hao)等(deng)線(xian)路(lu)引(yin)入(ru)靜(jing)音(yin)室(shi)內(nei)，並(bing)對(dui)過(guo)線(xian)孔(kong)采(cai)用(yong)密(mi)封(feng)性(xing)能(neng)良(liang)好(hao)的(di)密(mi)封(feng)材(cai)料(liao)進(jin)行(hang)密(mi)封(feng)，防(fang)止(zhi)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)外(wai)的(di)噪(zao)音(yin)通(tong)過(guo)孔(kong)洞(dong)進(jin)入(ru)室(shi)內(nei)，造(zao)成(cheng)幹(gan)擾(rao)。 

以(yi)上(shang)3點(dian)的(di)施(shi)工(gong)建(jian)造(zao)結(jie)構(gou)，能(neng)夠(gou)確(que)保(bao)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)對(dui)室(shi)外(wai)環(huan)境(jing)的(di)噪(zao)音(yin)隔(ge)聲(sheng)能(neng)力(li)，提(ti)高(gao)消(xiao)聲(sheng)實(shi)驗(yan)室(shi)的(di)聲(sheng)學(xue)性(xing)能(neng)，避(bi)免(wen)室(shi)內(nei)的(di)噪(zao)聲(sheng)測(ce)試(shi)結(jie)果(guo)受(shou)到(dao)影(ying)響(xiang)幹(gan)預(yu)。