121–130 of 133 posts
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lol that is the first thing that I thought as well. I just passed it off as a typical Hollywood trope, but now I'm quite delighted to see it become a reality.
> I just passed it off as a typical Hollywood trope I often wonder what makes people to pass off things like that as "typical tropes", where they are obviously realistic and doable.
Just yesterday I chuckled when recalling a James Bond movie involving Bond driving a car in reverse by viewing a back-up camera. At the time, it formed an instant "trope" because it was so cool and novel. Yesterday, I was doing exactly that with the backup camera on my car - obviously realistic and doable technology.
While it's cool to see this technique applied to consumer video, the general idea has been used in international espionage for a while now. In fact, Léon Theremin (yes, of the musical instrument) invented an early device capable of eavesdropping based on window vibrations: http://en.wikipedia.org/wiki/L%C3%A9on_Theremin#Espionage . I also recall that this is why all of the windows in the White House are fitted with t…
As a kid (in the early 80's!) I accidentally figured this out while "hacking" a sound based "walkie talkie" with a photo cell and a LED pointed at each other through a little telescope, from my house to my neighbors across the bock. The device worked, but had a bug. a hummmm on the receiver. For the longest time I could not figure out what was the "hummm", till I noticed it was there even with the transmitter off.. a…
...and that is when little Johnny knew he had to lay off the shrooms.
:P
I love hearing stories like yours though. I, too, miss the child-like wonder of making discoveries. We take the physical world we live in for granted, but there's just so much out there to see and learn from.
Wait, so what would be the best reflector for this type of thing? If I could host the ultimate cocktail party, placing ferns/etc all around the room, could I record every conversation with a single camera? What would those ferns look like? What would they be made of? I'm imagining christmas trees made of cellophane fibers or something.
If you're allowed to place the ferns, why not simply hide microphones in them?
Kind of off topic but just last night I was watching some (silent) lightning in the clouds, thinking how much more localized sound energy is when compared to light. In other words, I can see for light-years but can't hear much anything 100ft away. Or perhaps it's just our sensors are more sensitive to light waves than air pressure waves. Now I realize sound isn't so localized! It leaks. /rant
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> Because of a quirk in the design of most cameras’ sensors, the researchers were able to infer information about high-frequency vibrations even from video recorded at a standard 60 frames per second.
The audio from the 60fps video sounds pretty bad though, which I suspect is mostly because of inherent maths/physics limitations rather than anything that software can improve. Edit: They mention capturing frequencies up to five times higher than the 60Hz frame rate, which would mean a maximum frequency of 300Hz, which would suggest the equivalent of 0.6kHz audio, which is a 73.5th of the audio rate of a CD. I doubt…
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Why did I got down voted for that? It's true. Proof: http://www.crackajack.de/2014/08/04/visual-microphone-audio-...
Because posting "I had the exact same idea" without further interesting commentary is uninteresting.
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I record the dialog for your movies. Aprt from obvious sound effects like Darth Vader voices or so, actors' dialog is changed as little as possible during post production. It's not heavily EQed or comrpessed, because that would mean a corresponding change to the room tone and background noise, which would then fluctuate unnaturally as you went back and forth between the participants in a scene. In scenes with a lot o…
Thanks a lot for that insight. I will assume you work primarily for Hollywood with that description. It is interesting to hear about the behind-the-scenes from film industries in different parts of the world. In the Indian film industry (maybe not so much Bollywood, but more of the local ones like Tamil, Malayalam, etc) there's a LOT more post being done. Some entire Malayalam films have dubbed voices (for the origin…
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I know, but I still wonder about level of soundproof/mechanical vibration and the level of mic and camera sensor isolation VS level of optical vibration. In addition sound can travel many different paths since it is mechanical vibration, and traveling through sound proof glass is not the only path. Anw cool project.
I'm sure it's such a tiny amount that it isn't really relevant. Easy enough to test. Remove the bag of chips and just film the floor. See how much signal you can derive from that. Not exactly perfect science but gives a quick indication of "signal" that's reaching the system via other means.
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Because posting "I had the exact same idea" without further interesting commentary is uninteresting.
I only down vote when something is demonstrably wrong or offensive. I thought that's how everyone is doing it, so I wondered what could I have written that was wrong or offensive?
BTW: not everyone uses exactly your own personal guidelines.
BTW: HN Guidelines include "Resist complaining about being downmodded. It never does any good, and it makes boring reading."