What’s the resonant frequency of your eyes? What about your chest? The human body has a lot of little resonances that can come into play when trying to model the effect of sound and vibrations on humans. Rattling at the resonant frequency of the eye, for example, can make vision difficult or make a person sick. I personally, have been nauseated by bass music that rattled my chest. The above image shows the various resonant frequencies for the human body (modeling a person as a collection of masses and springs). Sound might not make your head explode, but at the right frequencies it can certainly make you uncomfortable. (Photo Credit: Sven-Olof Emanuelsson, Via: Power Standards Lab)
Gleaned from the link:
. . unlike a piano, it has no hammered dulcimers.Instead, there are four spinning wheels wrapped in horse tail hair, like violin bows. To turn them, Zubrzycki pumps a peddle below the keyboard connected to a crankshaft.
As he tinkles the keys, they press the strings down onto the wheels emitting rich, sonorous tones reminiscent of a cello, an organ and even an accordion.
The Feedback Organ
Flea Market Finds
During our visit to the flea market, our eyes zeroed in on this 1979 SUPERSCOPE (Marantz) Model C-202LP that was almost buried in a tangled pile of electrical cords, old cameras, and other gizmos. This unit is surprisingly in pristine condition, thanks in part to the plastic case it came with. Everything is in working order with bonus features including a pitch control knob, and tone/record level controls. With a few boxes of our 1990s mixtapes in storage, this solid cassette player will certainly come in handy for listening and converting content digitally!
Price after haggling…$8
Finnish designer, philosopher, artist, science populariser, futurologist, a pioneer of media culture, and an experimental film-maker.
Various recordings of shortwave radio oddities, numbers and noise stations. These mysterious broadcasts are found on shortwave bands and they are - or appear to be - with no definite purpose. These signals are said to actively haunt the airwaves after World War II at beginning of the Cold War. With the collapse of the Soviet Union many expect these stations to disappear overtime but radio monitors indicate these signals continue to exist with new ones surfacing every now and then along with stations that have operated for 30 years.
So what are they? There are many speculations what these numbers stations are; theories point to covert government-sponsored broadcasts for spies abroad, illegal activities such as drug trafficking, for various scientific research and undisclosed military operations. However, to this day, no organization, broadcaster or country ever admitted the use of these stations.[x]