我們國(guo)家制定(ding)的(de)(de)《中(zhong)華(hua)人(ren)民(min)共和國(guo)環境(jing)(jing)噪(zao)(zao)聲(sheng)(sheng)(sheng)污(wu)染(ran)(ran)防治法》中(zhong)把超(chao)過國(guo)家規(gui)定(ding)的(de)(de)環境(jing)(jing)噪(zao)(zao)聲(sheng)(sheng)(sheng)排(pai)放標(biao)準(zhun)，并(bing)干擾他人(ren)正常生活、工(gong)(gong)作和學(xue)習的(de)(de)現象稱為環境(jing)(jing)噪(zao)(zao)聲(sheng)(sheng)(sheng)污(wu)染(ran)(ran)。聲(sheng)(sheng)(sheng)音(yin)的(de)(de)分貝(bei)是聲(sheng)(sheng)(sheng)壓級單位，記為dB。用(yong)于表(biao)示聲(sheng)(sheng)(sheng)音(yin)的(de)(de)大小(xiao)。《中(zhong)華(hua)人(ren)民(min)共和國(guo)城(cheng)(cheng)(cheng)市(shi)區(qu)域(yu)(yu)噪(zao)(zao)聲(sheng)(sheng)(sheng)標(biao)準(zhun)》中(zhong)則(ze)明確規(gui)定(ding)了城(cheng)(cheng)(cheng)市(shi)五類區(qu)域(yu)(yu)的(de)(de)環境(jing)(jing)噪(zao)(zao)聲(sheng)(sheng)(sheng)zui高(gao)限值：　　療養區(qu)、別(bie)墅區(qu)、賓館區(qu)，晝(zhou)間(jian)(jian)(jian)50dB、夜(ye)間(jian)(jian)(jian)40dB；以居住、文教機關(guan) 為主的(de)(de)區(qu)域(yu)(yu)，晝(zhou)間(jian)(jian)(jian)55dB、夜(ye)間(jian)(jian)(jian)45dB；居住、商業(ye)、工(gong)(gong)業(ye)混(hun)雜區(qu)，晝(zhou)間(jian)(jian)(jian)60dB、夜(ye)間(jian)(jian)(jian)50dB；工(gong)(gong)業(ye)區(qu)，晝(zhou)間(jian)(jian)(jian)65dB、夜(ye)間(jian)(jian)(jian)55dB；城(cheng)(cheng)(cheng)市(shi)中(zhong)的(de)(de)道路交(jiao)通干線道路、內(nei)河航道、鐵 路主、次干線兩側(ce)區(qu)域(yu)(yu)，晝(zhou)間(jian)(jian)(jian)70dB、夜(ye)間(jian)(jian)(jian)55dB，（夜(ye)間(jian)(jian)(jian)指22點到(dao)次日晨6點）。　　按照國(guo)家標(biao)準(zhun)規(gui)定(ding)，住宅區(qu)的(de)(de)噪(zao)(zao)音(yin)，白天(tian)不(bu)能超(chao)過50分貝(bei)，夜(ye)間(jian)(jian)(jian)應低于45分貝(bei)，若超(chao)過這個標(biao)準(zhun)，便會(hui)對人(ren)體產生危害(hai)。那(nei)么，室內(nei)環境(jing)(jing)中(zhong)的(de)(de)噪(zao)(zao)聲(sheng)(sheng)(sheng)標(biao)準(zhun)是多少呢？國(guo)家《城(cheng)(cheng)(cheng)市(shi)區(qu)域(yu)(yu)環境(jing)(jing)噪(zao)(zao)聲(sheng)(sheng)(sheng)測(ce)量方法》中(zhong)第5條(tiao)4款(kuan)規(gui)定(ding)，在室內(nei)進行噪(zao)(zao)聲(sheng)(sheng)(sheng)測(ce)量時(shi)，室內(nei)噪(zao)(zao)聲(sheng)(sheng)(sheng)限值低于所在區(qu)域(yu)(yu)標(biao)準(zhun)值10dB。