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Listen to this video until the end, and when it stops, play it again to hear the difference. A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the base pitch of the tone moving upward or downward, it is referred to as the Shepard scale. This creates the auditory illusion of a tone that continually ascends or descends in pitch, yet which ultimately seems to get no higher or lower.[1] It has been described as a "sonic barber's pole".
Posted 6 days ago by anri1 in category: science   Comments (3)


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Pineapple seller in Bankerohan market Davao City, Philippines.
Posted 3 days ago by hanks in category: impressive   Comments (0)


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Watch photographer Lorenz Holder demonstrate some creative smartphone photography tips & tricks using an iPhone.
Posted 4 days ago by Tomo in category: geeky   Comments (0)



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Mechaneu v1 is the first in a series of kinetic, 3D printed objects designed to explore the limits of 3D printing as an art form. Created in a one-shot fabrication process, Mechaneu v1 features an elaborate network of interlocking gears and support structures. Spin one gear and the entire sphere is catalyzed with rotation.
Posted 4 weeks ago by TheRiddler in category: technology   Comments (0)


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Professional stunt man Ethan Swanson takes a flier off a rooftop in Chicago, Illinois.
Posted 4 weeks ago by PennY in category: crazy   Comments (2)