Crickets use highly sensitive mechanoreceptor hairs to detect approaching spiders. The high sensitivity of these hairs
enables perceiving tiny air-movements which are only just distinguishable from noise. This forms our source of
inspiration to design sensitive arrays made of artificial hair sensors for flow pattern observation i.e. Flow camera. The
realization of such high-sensitive hair sensor requires designs with low thermo-mechanical noise to match the detection-limit
of crickets’ hairs. Here we investigate the damping factor in our artificial hair-sensor using different models as it is
the source of the thermo-mechanical noise in MEMS structures. The results show that the damping factor estimated in air
is in the range of 10<sup>-12</sup> N.m/rad.s<sup>-1</sup> which translates into a 52 μm/s threshold flow velocity.