The electrical field strength in close proximity to the electrodes’ gap g increases for smaller distances, thus a
higher sensitivity for smaller gaps and an increased gap number is expected. We increased the gap (V5-V1-V4) from
0.6 mm up to 1 mm and measured a decreased sensitivity from 0.178 fF/103
Pa down to 0.152 fF/103
Pa (cf. fig. 4).