PCB精(jing)密(mi)-聲(sheng)級計簡(jian)介：831是一(yi)款1型(xing)精(jing)密(mi)聲(sheng)級計，具有高分(fen)(fen)辨率顯示，可(ke)進(jin)行多種不同應用測試。它(ta)綜合了1型(xing)精(jing)密(mi)聲(sheng)級計、環境噪(zao)聲(sheng)分(fen)(fen)析儀、個人噪(zao)聲(sheng)劑量計以(yi)及實時頻譜(pu)分(fen)(fen)析儀的所有功能于(yu)一(yi)體(ti)。831是Larson Davis第5代(dai)聲(sheng)級計，設計致力(li)于(yu)操(cao)作簡(jian)單、智能化(hua)以(yi)及可(ke)拓展固件平臺。
PCB精(jing)密聲(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)-校(xiao)準(zhun)(zhun)(zhun)器(qi)： 精(jing)密聲(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)校(xiao)準(zhun)(zhun)(zhun)器(qi)CAL200、CAL250系列：IEC 60942 1型手持式聲(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)計(ji)校(xiao)準(zhun)(zhun)(zhun)器(qi)，用(yong)于聲(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)計(ji)及其他(ta)聲(sheng)(sheng)(sheng)(sheng)(sheng)學測量設備的1/2英寸傳聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)在1000Hz（CAL250型號，251.2Hz）處的校(xiao)準(zhun)(zhun)(zhun)。 Larson Davis 的CAL200聲(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)校(xiao)準(zhun)(zhun)(zhun)器(qi)是一個(ge)(ge)電池(chi)供(gong)電的精(jing)密傳聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)校(xiao)準(zhun)(zhun)(zhun)器(qi)，它能提供(gong)一個(ge)(ge)輸出頻率在1KHz的94dB或者114dB的聲(sheng)(sheng)(sheng)(sheng)(sheng)壓級(ji)(ji)。
