We have all seen sound waves visualized on oscilloscope or even spectrum analyzer screens, but how often have we seen actual photographs, or even better video, of the three dimensional compression and rarefaction that is sound propagating in the real world? NPR’s skunk bear has a great video both demonstrating and explaining Schlieman flow visualization […]
Author Archives: Ken Greenebaum
Ken Greenebaum
Schlieman Flow Visualization of actual sound waves
Posted in Engineering Tagged Schlieman flow analysis, Skunk bear, Sound visualized, Sound waves, Visualization Leave a comment
Entrainment (for the New Year)
I just saw Ikeguchi Lab’s awesome demonstration of 100 metronomes becoming synchronized via mutual entrainment (the metronomes are arrayed on a hanging platform to facilitate) and thought this was just the thing to share as we say farewell to 2016 and look forward to 2017. Let’s collectively make 2017 a healthy, happy, safe, and prosperous […]
Posted in Engineering, News Tagged 2016, 2017, entrainment, metronome, new year, synchronization Leave a comment
Had a good if commercial Maker Faire
I have a bit of an odd relationship with Maker Faire. I love the great people behind the Faire at Make Magazine/O’Reilly (and hope their recent troubles have been overcome), and the Makers themselves; am amazed by the tremendous community support as countless thousands attend Maker events, now around the world, with their children, the next […]
Maker Faire 2016
Regretfully I won’t be hosting a booth again this year at Bay Area Maker Faire 2016 but I will be attending and would to see and hear from you all. Let me know where you will be and what you are most excited about!
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Bluetooth over MIDI
The Moog Model 15 Modular Synthesizer app has me looking for a Bluetooth over MIDI solution (Apple incorporates native MIDI over Bluetooth LE support in iOS9: spec, tech note for app developers). I want to skip over the kludgey USB-MIDI-Camera Connection dongle stack to interface my old Roland keyboard to the iPad (replacing the ancient Yamaha […]
Posted in Uncategorized Tagged Bluetooth, Bluetooth MIDI, iPad, MI.1, MIDI, Moog, Moog Model 15 app Leave a comment
Received my Doppler Labs Here T-Shirt
But I really want the device!
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Doppler Here. Where? Kickstarter…
A hearing aid for the rest of us? No, don’t tell the FDA, but read on. When I learned that Gints, an old SGI buddy and fellow signal processing advocate joined a small started called Doppler Labs I was curious so I visited their website and learned about Dubs their only product (earplugs with equalization […]
Posted in News Tagged Doppler Labs, DSP, Dubs, FDA, Hearing Aids, Here, noise cancellation, SGI, signal processing Leave a comment
The loudest recorded sound?
The loudest sound recorded in the annals of history if not recorded on actual audio gear was apparently the 1883 Krakatoa volcanic eruption according to Aatish Bhatia’s fabulous article. Some outtakes: The sound was 172 dB SPL 100 miles away based on a barometer measuring the pulse at 2.5 inches of mercury Sound waves (the […]
See you at Maker Faire Sunday
Yell if you want to connect with me at Bay Area Maker Faire this Sunday!
