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AWA6221A型聲(sheng)(sheng)級校準器(qi)(qi)主(zhu)要用(yong)于傳聲(sheng)(sheng)器(qi)(qi)、聲(sheng)(sheng)級計和其(qi)它聲(sheng)(sheng)學測量儀器(qi)(qi)的聲(sheng)(sheng)壓(ya)(ya)校準，符合GB/T15173 1級。聲(sheng)(sheng)壓(ya)(ya)壓(ya)(ya)縮(suo)型，穩(wen)定(ding)性好(hao)。電池工作，使(shi)用(yong)方(fang)便。

AWA6221B型(xing)聲(sheng)級校(xiao)準器(qi)主要用(yong)(yong)于傳聲(sheng)器(qi)、聲(sheng)級計和其它聲(sheng)學測量(liang)儀器(qi)的聲(sheng)壓校(xiao)準，符(fu)合(he)GB/T15173 2級。電池工作，使(shi)用(yong)(yong)方便，工作溫度范(fan)圍寬。