This is really fascinating...... proves that music is the source of life and its cycle
Cheers Avik Saha Kolkata On 22-Jun-09, at 7:15 PM, kiran srivastava wrote: > An interesting note I came across on the internet: > > “Ever heard a tree singing?” asks noted composer and bioacoustician > Bernie Krause. “It's 70 kHz,” he adds as he reaches for a CD-R in > his spartan Northern California studio. > > “We were listening for the sounds of bats,” Krause continued, “which > are up in the 47-plus kHz range. And we heard a steady signal, very > unbiological in the sense of it being from a creature. As we moved > closer to this cottonwood tree, the signal level increased. We > drilled a little hole in the tree and put this hydrophone in. We had > an instrumentation device with us that could record a frequency that > high, and we got a signal coming from the trunk of the tree. We > couldn't figure out what it was. Then we slowed it down by a factor > of seven, to get it down within our hearing range.” As we listened > to the tree's music, I was startled by the regularity of its pulse > and the subtle rhythmic accents. It was as if we were hearing a > recording of a virtuosic percussionist playing woodblocks. > > “What we discovered was that during a drought, the cells in the > xylem of the tree usually maintain a certain pressure from the water > that comes into the trunk of a tree during normally wet seasons,” > Krause explained. “When that pressure drops during a drought, the > cells automatically fill with air, to try to maintain the osmotic > pressure. And when they get too dry and they're pumping in air, they > pop. When they pop, they die, and the dead cells form the tree's > rings. So, when they pop, they make a noise: we can't hear it, but > insects can. And when insects hear multiple cells popping, they're > drawn to the tree because certain ones are programmed to expect sap. > And when the insects are drawn to the tree, the birds are drawn to > the tree to eat. It's all a microhabitat formed by sound.” > > Cheers, > Kiran Srivastava > Mumbai > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "indiantreepix" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.co.in/group/indiantreepix?hl=en -~----------~----~----~----~------~----~------~--~---
