Diffusion at source
A3D Technology - Diffusion At Source - mitigates against specular reflections (proven to corrupt the acoustic envelope we listen to). More importantly, A3D loudspeakers output their energy in a purely radial flow. In short, the acoustic energy of A3D speakers travels outward in a bubble-like radial pattern, whereas conventional loudspeakers create a number of 'zones of confusion’ in which the energy flow (acoustic intensity) is not radial (i.e. as if emanating from a nominal point source) but is tangential (think of it as a bit like the wake of a boat) - effectively robbing sounds' pure spherical wavefront of the energy we listen for.
This ‘energy conservation’ is very important. When all the acoustic energy is travelling radially from its source, there can be no energy travelling in a direction that might corrupt that sound-wave. This is not the case for conventional speakers, which will corrupt the sound-wave with their off-axis tangential energy (the main reason the ‘sweet spot’ of conventional speakers is so narrow).
The above is particularly pertinent to stereo/ambisonic signals, where timing cues are critical to our audiology’s ability to reconstruct the sound-stage of the original recording. Conventional speakers’ non-radial acoustic energy distribution corrupts the timing (and intensity) of such cues, leading our highly sensitive audiology to create a ‘false reality' of the playback sound (something we readily recognise as ‘not real’). Tangential energy locations might even appear as 'phantom loudspeakers’, producing cues that have nothing to do with the original audio signal!
A3D’s energy conservation, and much bigger sweet spot, means A3D'd speakers deliver even more accurate cues when configured as a stereo pair. Add to that their autodecorrelation, which not only prevents specular reflections but reduces the 'precedence effect' (a psycho-acoustic effect that collapses the sound stage when one sits nearer to one speaker than the other in a stereo pair) and you may understand why A3D is so important to spatial sound - and particularly to multi-speaker surround sound.
A3D’s mathematical modelling shows exactly how A3D speakers work - and exactly why conventional speakers can’t match them. But don’t just take our word for it - do the maths yourself. We’ll share ours with you if it helps - drop us an email.
From our latest Mathematical analysis, we are confident that A3D is the most significant contribution to the playback of recorded sound since the invention of the Dynamic Loudspeaker. In fact, all the data - and listening tests - suggests that A3D speakers behave pretty much exactly as an 'idealised point-source'. Whilst this has always been considered the 'gold standard' it has also been thought impossible - until now!
A3D's 'acoustic apodisation' through 'Diffusion At Source' enhances the listener’s perception of Intimacy, Envelopment and Clarity.
Listening through A3D technology really does sound 'like being there when the recording was made'.
Basis of the Technology – Several methods
The benefits of A3D technology can be achieved through several different methods:
Reflector – the original. Using a modified Quadratic Residue filter, the sound is bounced off it to create ‘Diffusion At Source’. This produces a clearly audible (and measurable) effect in the frequency band that contributes to our spatial awareness. This approach is readily compatible with conventional speaker-driver design, construction and components.
Array – the second method realised. Using multiple drivers and digital delay techniques to create ‘Diffusion At Source’. This method is particularly suited to high-power applications such as concert PA.
Manifold – 'the third way'. Using a multi-port design to create ‘Diffusion At Source’ from a single driver, this low-cost method is particularly suited to applications in consumer audio, TV, Smartphone, in-car audio and, information PA and ceiling speakers.