“…5b-j. At the absorption process, as the relative humidity is5,15,20,25,30, 35, 40, 45, 50 and 60% RH, the piezoelectric output voltage of the device is 0.85, 0.815, 0.806, 0.786, 0.752, 0.698, 0.63, 0.576, 0.464 and 0.21 V, respectively. The piezoelectric output voltage decreased with the increasing relative humidity.…”