For almost more than a year I wanted to write a tutorial about how to create a speaker on a leaf. Unfortunately, I found no time to write one. I think it is now time to show you the video as an example and provide you the links for built your own leaf speaker
For several years, I am really excited about Hannah Perner-Wilson aka Plusea's textile circuits. Fortunately, I could join her workshop during the Schmiede 2013 and applied her textile speaker to a lead of a plant. First experiment worked well with conductive thread, which kinda harmed the leaf structure. Therefore, we experimented with conductive ink, too. The result was much quiter noise.
Information and tutorials for building your own leaf speaker: