I discovered this information on the Internet, and started telling people about it.. It is so amazing and I am sure that the applications of this technology are tremendous.
Holographic Sound (or holophony) is NOT simple stereo!
The sound you will hear below is so realistic it's impressive. Not like 5.1 surround sound, the sound you hear goes all around you then up and down. The concept behind producing this realistic sound is called Holophony. To sum it up, think Holography for sound.
Holophony (or holophonic sound) is an audio recording technique which operates on a similar principle to Holography, except it applies these principles to sound and audio recording. It is related to the technique of wave field synthesis whereby sound is sampled over an area, usually a sphere, now Dummy head KU100 with omnidirectional microphones enabling the recreation of the shape of the sound wavefront as well as its direction. It is derived from the Huygens' Principle, which conveys the idea that an acoustical field within a volume can be expressed as an integral. It has some similarities with higher order Ambisonics. The result has been reported to be realistic and life-like three dimensional sounding audio recordings which have been said to exceed the realism of stereo sound.
(This is not to be confused with Holophonics designed by Argentine researcher Hugo Zuccarelli which is a form of binaural recording.)
The actual 3d sound image is created inside the BRAIN since its neurons is doing a sort of "computing" to find where a sound is coming from.. and your brain is doing this all the time!
You got to see or rather listen to this video clip with EARPHONES
so you can enjoy the 3d effect.
Another alarming video-audio clip is this one.. You have to listen to this with earphones and your eyes closed.. your brain can "see" the exact direction the box of matches is.... its truly amazing
Apparently they are making hearing aids with this technology that are far better than normal hearing aids. Instead of just amplifying the sound they are using the holophonic technology that gives real sound to the ear in a far more natural way so that slight differences are audible, thus making sounds more distinguishable.
Read about this here
http://www.nal.gov.au/Import%20web%20articles/Import%20NAL%20Conf/abstracts/agnew.htm
The Optimization of Binaural Hearing with Hearing Aids
Jeremy Agnew
Starkey Laboratories Inc.
Minnesota, USA
This presentation will focus on Starkey's new Cetera digital hearing aid. Conventional analog amplification can restore the audibility of lost sounds and is usually successful in quiet listening situations. However, simple amplification does not always restore the ability to understand speech in difficult listening situations. Part of this problem is due to the alteration of binaural phase and amplitude cues by analog hearing aids. These cues are required for the normal hearing mechanism to produce binaural squelch effects, thus allowing the brain to suppress interfering sounds that the listener does not wish to hear. The fitting of Cetera hearing aids includes measurement of the difference between unaided and aided external auditory canal filtering effects for the individual being fitted, then compensation with the Cetera digital filtering algorithm for the effects of the hearing aid inserted in the ear. The Cetera algorithm restores the natural relationships of phase and amplitude of the sound processed through the hearing aids during amplification. In this way the relationship of binaural cues that the central auditory system expects to hear is maintained, thus allowing the user's residual binaural hearing to hear and interpret these cues in the correct relationships.
Take a look at this spanish blog too that I have used google translate to convert to english
1 comments:
The Virtual Barbershop is indeed from Sharkey® and uses their Cetera™ algorithm, but the shaking matchbox actually is from Hugo Zucarelli’s Holophonics® — you know, the one you said that these should not be confused with.
That matchbox demo has been floating around the Web for years, and is on Hugo’s Holophonics demo album (along with a blow dryer, newspaper being crumpled and press down over the head and then removed and wadded up, and many others which have been around awhile).
As far as I can tell, Zucarelli has been trying to pass off more-or-less ordinary binaural as some wonderful new audio holography. He calls his “patented microphoneless recording device” a “Ringo™” but those who have seen it say that it looks just like a traditional binaural head model. He has some sort of digital processor that does enhance the sound somewhat, but I seriously doubt that it works the way that he claims it does (he claims that it works based on “otoacoustics,” the idea that the ear emits a tone which acts on incoming sound analogous to the way the reference beam of laser holography acts on incoming light, producing interference patterns — supposedly, his process records only the interference patterns, and your ears’ reference tone [tinnitis?] recreates the original sound including all positioning info from it).
His process does seem to work better with normal speakers (if placed to the sides of the listener’s head, even at a distance, or if the speakers and head form roughly an equilateral triangle) than straight binaural does. With the equilateral triangle and the matchboxes and blowdryer demos, I have actually heard sounds that seem to be coming from behind me, using only speakers that were in front of me, something that no other process that I have ever heard has ever achieved.
He claims that it works best with his own “cylinderical wave speakers,” another invention that sounds on the face of it like, well, poppycock. But I withhold judgment until I actually hear them in action. Supposedly they emit sound along a near-line instead of from a point or near-point source, causing a 2-D cylinderical instead of 3-D spherical propagation of the sound. This in turn means that the volume decay to distance ratio is only 1/d, not 1/d². Such speakers could fill an auditorium from a single pair placed near or on the stage, without near-deafening the people in the front rows. They would also not cause reverbation from the ceiling nor floor but only the walls, thus producing a less muddy sound. And, supposedly, the cylinderical waves don’t cause as much vibration when they hit solid objects, so that it’s much easier to block out the sound with, say, a door (thus preventing non-paying people from hearing a concert by standing just outside the auditorium emergency exits, for instance).
Maybe his stuff is for real. He has certainly convinced some big names to use his technology, including Pink Floyd on their final album Final Cut and the Music Bakery® for their Dimension™ library of holophonic sound effects (check out the demo on their site: it’s pretty impressive). I think it’s also used in some sensory immersion ride at some major theme park, but I forget which one.
If Holophonics really can project binaural-type audio from side speakers (even if the otoacoustics thing is woo as I suspect it to be), then it could form the basis for a revival of the drive-in theater! After all, one of the main reasons that those went out of style is because those tinny monophonic box speakers couldn’t even compare to a typical stereo TV, let alone a home theater system, let alone an indoor theater’s high-end system.
But imagine the projection booth containing a Holophonic Ringo head with 7.1 DTS speakers placed in the proper relationship with it. The stereo output from the Holophonics would be broadcast over low-power FM to the cars at the drive-in, and the speakers in the car (most of which are side-mounted anyway these days) would do the rest! Some future movies may even have true Holophonics sound tracks just for this purpose!
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