From the New York Times:

“Meijer, a research scientist in the Netherlands, has developed a technology called the vOICe, which allows you to represent visual information – to “see” – with sounds. The device is a tiny camera, a laptop and headphones. The camera is mounted on your head and the laptop takes the video input and converts it into auditory information, or soundscapes. The scene in front of you is scanned in stereo: you hear objects on your left through your left ear and objects on your right through your right ear. Brightness is translated as volume: bright things are louder. Pitch tells you what’s up and what’s down. The image refreshes once a second.”

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This is a wonderful application for 3D audio.

A scientific article I stumbled upon scanned subject’s brains using fMRI whilst they listened to voices being played over headphones. The voices were either played in stereo (inside the head) or using 3D audio (outside the head). The aim was to find the neural substrate for the perception of voices outside the head (in what we might call external auditory space) in an effort to better understand auditory hallucinations of that type. You can find the article for free here. Very interesting.

One other large emerging application of 3D audio that you might not be aware of is for hearing aids. People who require hearing aids at the moment have sounds simply amplified and they are unable to know the direction of where the sounds came from. This makes situations such as a dinner party almost impossible. Normal listeners at a dinner party are able to follow one conversation and ignore the other voices due largely to the fact that the brain knows where the sounds are coming from (this is the so-called Cocktail Phenomenon). Once this ability is lost, as with a hearing aid, all the voices are mashed together and it is impossible to follow a conversation. A hearing aid with 3D audio amplifies the sounds around the listener and at the same time provides a sense of where the sounds are coming from.

Have a listen to this demo (USING HEADPHONES ONLY) to see what it is like have a hearing aid with and without 3D audio. The demo starts without 3D audio and then 30 seconds in it switches to 3D audio, you will hear it don’t worry (think of what it’s like to have hallucinations of people talking while you listen). Focus on trying to understand the different talkers. Again, you must use headphones:

The aim of the first stage of the project has been to predict where in this space you the listener would be. We are in the process of refining a tool that will be able to predict your position in this space based on a few key morphological parameters (mainly related to the size of your ear). Once your position has been calculated we can then choose the closest neighbour (best set of ears) that is best suited for you. Have a listen here (or click on ‘Project Demo’ at the top of the page) to experience what it is like to listen with another person’s ears. See which set of ears you like more: the red, green or purple?

People Space

Is 3D here to stay? Could 3D audio be the next technology production companies roll out in order to lure customers back to cinemas and away from free downloads over the internet?

A recent article in The New York Times has suggested that the estimated $58.2 million in tickets at North American theatres over the opening weekend of ‘Monsters vs. Aliens’ “indicates that 3-D is the story”. The article goes on to say that a very significant number of theatres are being equipped for future 3D releases suggesting that the movie format could be here to stay this time.

Given the success of ‘Monsters vs. Aliens’ and the willingness of audiences to wear 3D glasses, could it be imaginable that they would be happy to wear headphones at the movies for a 3D audio effect? Using headphones at the cinema would allow for the ultimate surround sound experience, given that speakers can only create a convincing effect for a small number of seats in the cinema at the so-called ‘sweet spot‘. Movies could also be played in many different languages at the same time.

It’s an interesting concept, only time will tell.

What is interesting about Microsoft’s vision is the focus on tactile technologies, and in particular augmented and virtual reality. This is particularly relevant for the ‘listen with your own ears’ project (see About) given that the technology is all about creating a personalised virtual audio environment. Thus it could be used to compliment the technologies of the future in a big way.

Have a look at the montage and see what you think.

Visit the site and watch the short movie (or watch it below) for some amazing audio effects. Remember to wear your headphones.

Enjoy

The GSMA Mobile World Congress (formerly 3GSM World Congress) represents the world’s largest exhibition for the mobile industry with a stimulating and insightful congress that brings together prominent leaders and personalities from mobile operators and equipment vendors, as well as Internet and entertainment professionals. Arkamys will have a stand at the GSMA Mobile World Congress showing off its latest technology from the 16th to the 19th of February. http://www.mobileworldcongress.com/overview.shtml

It is an example of what is called a ‘binaural recording‘. A dummy head, with tiny microphones stuck inside its ears, is used to record an acoustic environment such as a person cutting your hair or a band playing in a room. You then listen to the binaural recording over headphones and it is as if you were sitting at the position of the dummy head at the moment of the recording. The best way to really understand the process is to just watch and listen to these examples:

YOU MUST USE HEADPHONES FOR THE FIRST EXAMPLE!

‘Snakecharmer-Binaural‘ by Ottmar Liebert

John Q. Walker’s talk (7 minutes 45 seconds in) entitled ‘Re-creating great performances’ from the EG 2007 conference posted on TED

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