The other thing I noticed in the video where the designer is describing the speaker is that he's saying "each driver handles only a narrow frequency band", which leads me to believe it's just a bunch of bandpass filters. He also keeps talking about reproducing "harmonics", which makes me wonder if he really know what he's talking about. A music track contains myriads of harmonics and most likely non-harmonic frequencies as well from noise (as in cymbals and similar), as well as beat frequencies arising from non-linear combination of sounds. Reality is highly non-linear...
The designer started this thread
https://www.audiosciencereview.com/...st-speaker-to-reproduce-a-60hz-sq-wave.50863/
also look here https://www.diyaudio.com/community/threads/ultimate-open-baffle-gallery.123512/page-232#post-7988607
https://www.audiosciencereview.com/...st-speaker-to-reproduce-a-60hz-sq-wave.50863/
also look here https://www.diyaudio.com/community/threads/ultimate-open-baffle-gallery.123512/page-232#post-7988607
Nothing instills confidence like when someone talk about a "sign wave"...
That is true for a single extended source. But that is not the case in this case. Each frequency range has its own (single) point source.
The bandwidth of each loudspeaker array in this case is divided into 20 point sources, each a different distance from the reference listening tuning position.
The FIR processing can time and phase align each of the 40 initial direct wavefronts at one specific listening position, the stereo image "picture" can be "in focus" there.
The high frequency elements are not vertically located over the lower bands, and the individual dipole radiation patterns of the various frequency bands are widely separated vertically, decreasing correlation of any room reflections to the virtual single point source alignment position.
The term 'Fourier' is definitely a misnomer. To Fourier transform t seconds of an audio signal of with a bandwidth of B hertz, one would require t.B/2 different sources. e.g. 1 sec waveform 10 kHz wide would require 5000 distinct sources, each programmed to produce a signal of given amplitude and phase, and each updated every second.
Its an extreme multiway speaker.
In concept, it does vaguely remind me of the Melotron (any Moody Blues fans out there?) and the Moog synthesiser.
Its an extreme multiway speaker.
In concept, it does vaguely remind me of the Melotron (any Moody Blues fans out there?) and the Moog synthesiser.