Bioacoustician Bernie Krause has recorded the amazingly rhythmic vascular systems of thirsty trees:
He discovered that the cells in the xylem and phloem of the tree fill with air to try to maintain the osmotic pressure that's usually produced by the sucking of water up through the roots. At a certain point the cells burst. Krause adds "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: The sound of popping cells." (Incidentally, when the xylem cells pop, they die and form the rings of the tree). Recordings are made at their natural high frequency (about 47 kHz!) with a hydrophone and then slowed down by about a factor of seven.
Bernie's done some fascinating work in the field of "biophony", which is based around the idea that every animal in an eco-system has its own acoustic territory, or bandwidth of sound that it vocalizes in. If something comes in and takes over a certain bandwidth (like the regular route of a noisy airplane) entire populations can suffer, or be forced to adapt.
The Australian Acoustic Observatory project, described by its creators as a kind of “Google Street View of sound,” is a new acoustic sensor network of hundreds of microphones and digital audio recorders distributed across multiple remote ecosystems on the continent. The solar-powered system will record animal and natural sounds continuously for 5 years. According to […]
Is your brain a machine? Are your thoughts and feelings just malware of the mind? (And what “really” is a machine, anyway?) John and Eva referee the transhumanist fight of the century. In the blue corner, we have Eva meeting founder and Bryan Johnson, CEO of Kernel, straight from his office in LA. And in […]
Weighted blankets are officially a thing. And if you’ve ever tried one, you know there’s a reason for the fuss. Parents have known for generations that swaddling a baby has a profound calming effect, and the gentle pressure that blanket weights provide can have the same effect on restless sleepers. Pretty much all parts of […]
Walk through any office, and you will likely spot a few bobbleheads. These wobbly figurines are great fun to have around, although most celebrate people we will never meet. For something a little more personal, try Handmade Custom Bobbleheads. These mini caricatures are sculpted and painted by skilled artisans, based on any photo you provide. […]
In the early days of the web, everyone wanted a .com domain for their site. As a result, all the good ones got snapped up. But .com no longer has the cachet it once did. In fact, many new businesses and individuals are opting for other top-level domain extensions. One of the most memorable is […]