噪(zao)聲(sheng)(sheng)是(shi)發(fa)聲(sheng)(sheng)體(ti)做無規則振動時發(fa)出的聲(sheng)(sheng)音，聲(sheng)(sheng)音由物(wu)體(ti)的振動產生(sheng)，以波的形(xing)式在一定的介質(如固體(ti)、液(ye)體(ti)、氣體(ti))中進(jin)行(xing)傳播通常所說的噪(zao)聲(sheng)(sheng)污(wu)染是(shi)指人為造(zao)成的。產業革命以來(lai)，各種機械設備的創造(zao)和使用，給人類(lei)帶來(lai)了(le)繁(fan)榮(rong)和進(jin)步，但同時也(ye)產生(sheng)了(le)越來(lai)越多(duo)而且越來(lai)越強的噪(zao)聲(sheng)(sheng)。

室內噪聲的(de)主要來源：

1.交通運(yun)輸(shu)噪聲

城(cheng)市(shi)交(jiao)(jiao)通(tong)業(ye)日(ri)(ri)趨發達，給人們工作和(he)(he)生活(huo)帶來了(le)便捷和(he)(he)舒適，同(tong)時也促進了(le)經濟的(de)(de)發展。但不(bu)能不(bu)看到，隨著城(cheng)鄉車輛的(de)(de)增加，公路和(he)(he)鐵路交(jiao)(jiao)通(tong)干線的(de)(de)增多(duo)，機(ji)車和(he)(he)機(ji)動車輛的(de)(de)噪(zao)聲(sheng)(sheng)已成了(le)交(jiao)(jiao)通(tong)噪(zao)聲(sheng)(sheng)的(de)(de)元兇，占城(cheng)市(shi)噪(zao)聲(sheng)(sheng)的(de)(de)75%。據統計表明，北(bei)京是世界有(you)名的(de)(de)噪(zao)聲(sheng)(sheng)污染城(cheng)市(shi)。雖(sui)然城(cheng)市(shi)車輛不(bu)及日(ri)(ri)本(ben)的(de)(de)十分之一， 噪(zao)聲(sheng)(sheng)程度卻比日(ri)(ri)本(ben)高出1倍。特別是一些臨街的(de)(de)建(jian)筑，受害極(ji)重。

2.工業機械(xie)環境(jing)噪聲(sheng)

這也(ye)是室內噪聲(sheng)(sheng)污染的主(zhu)要來源。由于各種動力機(ji)、工(gong)作(zuo)機(ji) 做(zuo)功時產(chan)生(sheng)的撞擊、摩(mo)擦、噴射(she)以(yi)及振動，可產(chan)生(sheng)七八十分貝以(yi)上(shang)的聲(sheng)(sheng)響。這些聲(sheng)(sheng) 響，像紡織車(che)間、鍛(duan)壓車(che)間、粉碎車(che)間和鋼廠(chang)、水泥(ni)廠(chang)、氣泵(beng)房(fang)(fang)、水泵(beng)房(fang)(fang)都(dou)比較嚴 重，雖然都(dou)做(zuo)了一定程度的降噪處理，但仍(reng)然不能從根本上(shang)消(xiao)除(chu)機(ji)器(qi)本體(ti)上(shang)所產(chan)生(sheng) 的噪聲(sheng)(sheng)。

3.建筑施(shi)工噪聲

建筑施(shi)工(gong)(gong)(gong)(gong)(gong)噪聲是在(zai)工(gong)(gong)(gong)(gong)(gong)程建設(she)實施(shi)階段，包(bao)括基礎(chu)工(gong)(gong)(gong)(gong)(gong)程工(gong)(gong)(gong)(gong)(gong)程施(shi)工(gong)(gong)(gong)(gong)(gong)、主體結構施(shi)工(gong)(gong)(gong)(gong)(gong)、屋面工(gong)(gong)(gong)(gong)(gong)程施(shi)工(gong)(gong)(gong)(gong)(gong)、裝飾工(gong)(gong)(gong)(gong)(gong)程施(shi)工(gong)(gong)(gong)(gong)(gong)所產生的(de)噪聲(已竣工(gong)(gong)(gong)(gong)(gong)交付使用的(de)住(zhu)宅(zhai)樓進行(xing)室內裝修活動除外)

噪(zao)聲(sheng)(sheng)分為(wei)晝間噪(zao)聲(sheng)(sheng)和夜間噪(zao)聲(sheng)(sheng)

晝間噪聲時間：指6：00到22：00之間的(de)時段

夜間噪(zao)聲時間：指(zhi)22：00到次(ci)日6：00之間的時段