monaural stereophonics

[hobby1]

hi,

I was very intrigued by this configuration

http://www.linkwitzlab.com/links.htm#The Inaudible Loudspeake

after reading the various links I realized that the idea is to add 2 omniwave which do not radiate in the same axis to avoid comb filtering or interference ,knowing that the 2 speakers receive the same signal without further processing, I do not understand the purpose of such a configuration?
here the patent link

http://www.patsnap.com/patents/view/WO2006100250A2.html

can it be a "line array like" radiating mode?
or a line spot rather than sweet spot?
is it use the on wall mounting to make a big sound screen?
what do you think about that??

[graaf]

ok, all right, I have calmed down

so basically it's a flooder - nice that someone else is trying

however the monaural stereophony theory is just stupid

[graaf]

and the fact that the guy chose for his business logo a sign that is also my diyaudio avatar is even quite funny

[hobby1]

hi,

thanks for reply graaf,but why must you calmdown to answer me?
i hope i don't hurt anybody with my question!

if i was curious about that ,is that S. Linkwitz usualy propose good links,informative,innovative,and I thought I did not understand what was the interest of the "monaural stereophonic" ,or if there is one...

[graaf]

Originally Posted by hobby1

thanks for reply graaf,but why must you calmdown to answer me?

well, here is why: Loudspeakers and room as a system

ok! I have read the patent - it's not a flooder stricto sensu but the principle is the same

just as the logo is the same, and even the name...

because I think that the essential identity is acknowledged indirectly even by Mr de Klerk himself, download the photo from the site: Bloomline Acoustics

then it's name appears - it is photo_fldr here is the same name - fldr for... flooder? funny isn't it? the guy has a sense of humour

notice that what is shown on the pictures and described in the patent differs significantly from what was shown earlier at 2007 demostration

look carefully at the 2007 picture - what do You see on the floor by the tripods?
of course You can see two stereo flooders there! I marked them with red arrows

apparently only later it was founded by Mr de Klerk that the 2007 tripod array can be turned upside down, that also down-firing pair of speakers can be used when working together with inside-firing pair

what I find quite funny but also quite satisfying is that the theory exposed in the demonstration and patent descriptions is essentially made of claims that I presented here on the forum:

1) the crucial factor for making better stereo is to hide the stereo speaker as a physical source of sound, to make it inaudible - onhoorbare luidspreker - unlocalisable for our hearing mechanism as distinct physical sound source in the room

2) the crucial factor for localisation of phantom sources is preservation of coherent transient shape patterns

3) the above conditions can be met by means of some counterintuitive placement of time coherent loudspeakers that results in omnidirectional polar pattern - but not idealistically over the entire frequency range as it's unnecessary - just over the frequency range that is critical in determination of transient and wave shape patterns

4) when the conditions 1) and 2) are met the position of the head may move relatively far away from this optimal position (often referred to as the sweet spot), (...) the sound image is more stable in space than with a usual setup

I am sure that Mr de Klerk started His project quite independently from me as His 2007 demonstration predates the start of my L&R thread

but equally I am sure that someone was reading the thread and is well aware of the essential identity of our concepts


so yes - it works, although I believe that it works equally well in it's pure flooder simplicity, without the need of lower inside-firing pair of speakers

however without this additional pair it would be much harder to claim a legally required so called inventive step in the patent application

regards,
graaf

ps. calling this monaural stereophony is stupid

[hobby1]

ok, I have not read the whole topic but after what I read, the only common principle is the indirect radiation but the approaches are different, even opposite
the "Flooder"is a directive system, the "bloomline" is omni, "flooder" avoids reflections from the walls "bloomline" use it,I am not convinced that the listening result will be identical,but never heard any of them
if i understand what explain the patent,I think the principle of Mr. de Klerk is mainly based on the addition of two quasi-spherical radiation, and positioning of the speakers should just respect a rule,frontwaves meet at ear level, no matter which speaker radiates downward or toward the inside or outside

but I dont understand what it give ? ans this model Bloomline Acoustics on wall and no coherent radiation don't respect completely the principle?

[graaf]

Originally Posted by hobby1

ok, I have not read the whole topic but after what I read, the only common principle is the indirect radiation but the approaches are different, even opposite
the "Flooder"is a directive system (...) "flooder" avoids reflections from the walls (...)

not really, sort of
well, truth is that the first phase of the L&R thread was a bit uhm... diplomatic for my part
in effect after three years it can be a bit misleading, I apologize

a flooder is not necessary an 8 inches full range driver, a lot of various flooders were tested by forum users

even an ordinary two-way bookshelf speaker was tried in mono configuration

and even then it was an onhoorbare luidspreker unbelievable isn't it? it is really that simple

Originally Posted by hobby1

if i understand what explain the patent,I think the principle of Mr. de Klerk is mainly based on the addition of two quasi-spherical radiation, and positioning of the speakers should just respect a rule,frontwaves meet at ear level, no matter which speaker radiates downward or toward the inside or outside

or upward... yes that's correct, it doesn't matter, in fact it doesn't even matter if there is the second pair radiating to the outside or inside at all

one pair of speakers radiating upwards suffices, short speakers, preferably very short, preferably coincident, preferably positioned against the wall

Originally Posted by hobby1

but I dont understand what it give ? ans this model Bloomline Acoustics on wall and no coherent radiation don't respect completely the principle?

the principle of the patent aims at disorientating our sense of hearing as to the position of the speakers as physical sources of sound in order to make the speaker onhoorbare as such
and this model on the picture strictly follows the principles of the patent

regards!
graaf