Singing Plants

One day when I was taking a walk with my little sister, she started singing to the leaves and flowers, hoping for a botanical duet. I wondered: what if her youthful fantasy were true? What if plants appreciate our singing, and could sing back to us. 

To realize this surrealist creation, I returned to my passive amplifier knowledge on the physics to speakers to apply the same principle on leaves. In a speaker, the electric current carries electrically-coded music from the source through a copper coil, producing an electromagnetic field that interacts with a magnet in the middle of a coil. The coil vibrates along with the speaker cone surrounding it, pushing and pulling the air to create sound waves that we can sing and dance to.

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To make leaves behave the same way, I connected a coil of copper foil to an audio amplifier, essentially turning the leaf into a simple speaker. When I played music on my phone, the copper coil vibrated, which vibrated the leaf, and played my sister’s favorite song, Let It Go, as she listened with a thrill.

Here's a video of how I made it (please turn up the volume at the end since the sound was not very loud.):

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