Bioacoustics, A Brisk Wind and Spanish Moss, Tillandsia usneoides

Tillandsia usneoides is also known as Spanish Moss and is found frequently here across Florida and the South.

I placed a stereo set of Piezo microphones inside the moss during a brisk (4 or 5 m/s) wind to record vibrations of the moss rustling in the wind.

The friction or rubbing noises may be from vibrations created by the Spanish moss rubbing against the tree branches in the wind.

Seemingly, the wind audio also creates a doppler effect that the piezo mic picks up.