In early May when the trees leaf out we’ll once again hear the soothing sound of rustling leaves. Did you know trees make sounds we cannot hear?
Last year an article by Sarah Zhang in Gizmodo caught my attention. Eavesdropping On The Secret Sounds Of Trees describes the art and science of a Swiss research team who’s recording the internal sounds of trees.
The project, fittingly called trees, attaches sensitive microphones to trunks, branches and even leaves, then records the sounds and analyzes them in light of simultaneous environmental factors such as drought. Click here and scroll down to hear the clicks, pops, hisses and taps made by a Scots pine (Pinus sylvestris).
Closer to home our trees are getting ready for spring, the sap is running, and it’s maple sugaring time in North America.
And so I wonder …
If we had those special microphones could we heard the sap rising in the maples? Or is it so loud that we can hear it by putting our ears to the trees?
I’ll have to see.
(photos from Wikimedia Commons. Click on the images to see the originals)