多(duo)(duo)功能廳的噪音(yin)治理電(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)指(zhi)標(biao)設計，多(duo)(duo)功能廳:會(hui)(hui)議廳電(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)系統(tong)設計的聲(sheng)(sheng)(sheng)(sheng)學(xue)特性(xing)(xing)指(zhi)標(biao)均采用廣播(bo)電(dian)(dian)影電(dian)(dian)視部(bu)(bu)部(bu)(bu)分(fen)頒標(biao)準GYJ25-86<<廳堂電(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)系統(tong)聲(sheng)(sheng)(sheng)(sheng)學(xue)特性(xing)(xing)指(zhi)標(biao)>>中語言和音(yin)樂兼用的電(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)系統(tong)二級(語言電(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)系統(tong)一級)聲(sheng)(sheng)(sheng)(sheng)學(xue)特性(xing)(xing)指(zhi)標(biao)。多(duo)(duo)功能廳具(ju)備多(duo)(duo)媒體(ti)會(hui)(hui)議、同(tong)聲(sheng)(sheng)(sheng)(sheng)傳譯、會(hui)(hui)議電(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)、文藝表演及(ji)交誼舞會(hui)(hui)等多(duo)(duo)種使(shi)用功能的，電(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)系統(tong)聲(sheng)(sheng)(sheng)(sheng)學(xue)特性(xing)(xing)指(zhi)標(biao)。

多(duo)功(gong)能廳(ting)的(de)(de)噪(zao)(zao)音(yin)治(zhi)理電聲系(xi)(xi)統(tong)聲學(xue)特(te)(te)性指標采用語言和音(yin)樂兼用的(de)(de)電聲系(xi)(xi)統(tong)二級聲學(xue)特(te)(te)性，為(wei)此(ci)多(duo)功(gong)能廳(ting)電聲系(xi)(xi)統(tong)聲學(xue)特(te)(te)性指標為(wei):1。聲壓級(空場(chang)穩態(tai)準峰值聲壓級dB)125-4000Hz范圍內平均聲壓級大于(yu)或等于(yu)93dB2。傳輸頻率特(te)(te)性63-8000Hz，以125-4000Hz的(de)(de)平均聲壓級為(wei)0dB，隔音(yin)降噪(zao)(zao)設備(bei)廠家，允(yun)許偏差值為(wei)+4至(zhi)-12dB，且(qie)在125-40000Hz內小(xiao)于(yu)或等于(yu)正負4dB。

噪音治理(li)技術早期燃煤(mei)機(ji)(ji)組大多采(cai)用(yong)鋼球磨煤(mei)機(ji)(ji)即低速磨，其噪聲水平在100dB(A)~120dB(A)，對于鋼球磨煤(mei)機(ji)(ji)的(de)噪聲治理(li)，有效措施主要包括以下三種:(1)筒(tong)體(ti)外殼阻(zu)尼層?阻(zu)尼材料(liao)的(de)厚度一般應為外壁厚度的(de)2~3倍，可降噪10dB(A)左右(you)?(2)隔(ge)聲套(tao)?將多層吸聲?隔(ge)聲阻(zu)尼材料(liao)組合(he)在一起，把磨煤(mei)機(ji)(ji)筒(tong)體(ti)緊緊地捆箍起來，與(yu)筒(tong)體(ti)一起旋轉?隔(ge)聲套(tao)一般采(cai)用(yong)組合(he)式結構，可將設備噪聲降至95dB(A)左右(you)。