... through RC232C connector and communication cable. It can realize Lp real time communication output and airplane noise Lepn measurement. It is widely ... Lae, SD, Lmin, L95, L90, L50, L10, L5, Lmax, reverberation time T60, LepnAutomatic acquisition and storage: 200 teams of data single ... 25v-1.35v, 0.1v/10dBDisplay 40mm×70mm LCD digital display, 4 digits, resolution 0.1dBPower Five pieces of LR6 batteries ...