聲(sheng)級計是平時(shi)基礎的噪(zao)聲(sheng)(sheng)(sheng)(sheng)測量儀(yi)器,被寬泛(fan)利(li)用(yong)于(yu)環境(jing)噪(zao)聲(sheng)(sheng)(sheng)(sheng)、交通噪(zao)聲(sheng)(sheng)(sheng)(sheng)、工業(ye)噪(zao)聲(sheng)(sheng)(sheng)(sheng)等(deng)各種噪(zao)聲(sheng)(sheng)(sheng)(sheng)測試(shi)中(zhong)。聲(sheng)(sheng)(sheng)(sheng)級計(ji)要(yao)是較長(chang)時(shi)間沒使用(yong),,或通過檢(jian)修,改換傳(chuan)聲(sheng)(sheng)(sheng)(sheng)器,則須要(yao)實(shi)行校(xiao)準(zhun)。聲(sheng)(sheng)(sheng)(sheng)級校(xiao)準(zhun)器就是用(yong)來對聲(sheng)(sheng)(sheng)(sheng)級計(ji)和其它聲(sheng)(sheng)(sheng)(sheng)學(xue)測量儀(yi)器實(shi)行聲(sheng)(sheng)(sheng)(sheng)壓(ya)校(xiao)準(zhun)的。
聲級校準器 型號(hao):ND9A
型(xing)聲級校準器(qi)是用來(lai)對(dui)聲級計(ji)和(he)其它聲學測量儀器(qi)作聲壓校準用。
它(ta)的(de)明顯特點是(shi):它(ta)具備94.0dB、和114 dB標準(zhun)聲(sheng)(sheng)壓(ya)級(ji),可(ke)對(dui)儀(yi)器(qi)的(de)聲(sheng)(sheng)壓(ya)級(ji)實行(xing)校(xiao)準(zhun)。它(ta)的(de)工作(zuo)頻率(lv)為(wei) 1000+0.1% Hz,因此可(ke)在(zai)(zai) A、B、C、D或線(xian)性頻率(lv)計(ji)權上(shang)實行(xing)校(xiao)對(dui)。運用(yong)溫度(du)在(zai)(zai): -10 to +50°C,存貯溫度(du): -40 to +65°C,溫度(du)系數: 0 ~ 0.01 dB/°高度(du)影(ying)響: 每(mei)從海平面升(sheng)高60米(mi),聲(sheng)(sheng)壓(ya)下降 0.1 dB 。實用(yong)在(zai)(zai)φ12.7mm(1/2英寸)和φ23.77mm (1英寸)傳聲(sheng)(sheng)器(qi)及聲(sheng)(sheng)學(xue)測量儀(yi)器(qi)校(xiao)準(zhun)。
ND9A聲級校(xiao)準器體積小、分量輕、耗電(dian)省、功能(neng)穩固、運(yun)用簡便。能(neng)與SL-5868P、SL-1256DOS等聲級計(ji)及其它(ta)聲學測量儀器配套運(yun)用,是一種袖珍(zhen)型(xing)理想校準聲源。