香港希瑪噪音計AR824產品介紹：

聲(sheng)(sheng)(sheng)(sheng)級計又叫數(shu)字噪(zao)音計AR824是噪(zao)聲(sheng)(sheng)(sheng)(sheng)測量中最基本(ben)的(de)(de)儀(yi)器(qi)(qi)。聲(sheng)(sheng)(sheng)(sheng)級計一般由(you)電(dian)(dian)容式傳聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)、前置放(fang)大器(qi)(qi)、衰(shuai)(shuai)減(jian)器(qi)(qi)、放(fang)大器(qi)(qi)、頻率計權網(wang)絡以及有效值指示表頭等組(zu)成(cheng)。聲(sheng)(sheng)(sheng)(sheng)級計的(de)(de)工作原理(li)是：由(you)傳聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)將聲(sheng)(sheng)(sheng)(sheng)音轉換成(cheng)電(dian)(dian)信(xin)(xin)號(hao)(hao)，再由(you)前置放(fang)大器(qi)(qi)變換阻抗(kang)，使傳聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)與衰(shuai)(shuai)減(jian)器(qi)(qi)匹配。放(fang)大器(qi)(qi)將輸(shu)出信(xin)(xin)號(hao)(hao)加(jia)到計權網(wang)絡，對信(xin)(xin)號(hao)(hao)進行頻率計權(或外接濾(lv)波器(qi)(qi))，然后(hou)(hou)再經(jing)衰(shuai)(shuai)減(jian)器(qi)(qi)及放(fang)大器(qi)(qi)將信(xin)(xin)號(hao)(hao)放(fang)大到一定的(de)(de)幅值，最后(hou)(hou)經(jing)過(guo)數(shu)字電(dian)(dian)路處理(li)器(qi)(qi)處理(li)后(hou)(hou)，在(zai)LCD上(shang)顯示相應的(de)(de)數(shu)值。

香港希瑪噪音計AR824技術參數：