JM skrev:Var i den icke artificiella verkligheten finns naturliga stereokällor? JM
Stereoljudkällor finns inte naturligt utan skapas artificiellt.
Floyd Toole kallar stereoreproduktion asocial pga minimal sweetspot o
instabil phatomcenter.
Stabilare phantomcenter kan skapas genom....
1.
Här visar Siegfrietz L att dipolhögtalaren ger stabilare illusion av phantom-center än monopolen.
Dipol
Monopol
http://www.linkwitzlab.com/The_Magic/The_Magic.htm
Stereoreproduktion handlar om att så lite som möjligt störa illusionen av att lyssna på inspelningsarenan.
Some Conclusions . . .
Sound reproduction in domestic size living spaces has been a life-long interest to me. I have learned much from observation and from my own experimentation. Mostly they confirmed what others already had written about, such as in the many publications of the AES, or the classic texts of Olson and Beranek. But in sound reproduction there are still areas that have not been studied to the point where clear prescriptions or limits can be given as, for example, to sound distribution in acoustically small spaces, or to audibility thresholds for non-linear distortion. I have always been fascinated by the multi-disciplinary approach that has to be taken to the design of loudspeakers, if the goal is higher than another typical consumer product. That approach must include old and new understandings in the fields of mechanics, electronics, acoustics, and psycho-acoustics, as well as extensive experience with test and measurement.
So here are some conclusions that I have come to. I will write them in the form of statements. The background for many of them can be found on the pages of this website. Other conclusions were drawn from observations at CES, dealer show rooms and private listening venues. Many of them are obvious, but I state them since their sonic consequences seem to be underestimated. There are probably more and I might add them as I think of them.
Loudspeakers
•The best one can hope for with 2-channel sound reproduction is the illusion of listening into the recording venue. Physics does not allow the accurate reproduction of the original sound field with only two speakers.
•Since sound reproduction is about creating an illusion it becomes very important to avoid or minimize any clues that would detract from the illusion. Such clues come from linear-distortions, such as frequency and polar response, and from non-linear distortions with their generation of tones and sounds that were not in the original.
Siefried Linkwitz
http://www.linkwitzlab.com/conclusions.htm
2.
Floyd Toole berör i sin bok att genom att använda linjehögtalare med endast 3 dB dämpning per avståndsfördubbling, istället för 6 dB, skapas stabilare phantomcenter och bredare sweetspot.
http://www.toa.jp/soundoh_wiki/index.ph ... 0extend%3F
JM
men nu var det väl inte linjekälla som center som JM pekade på utan linjekällor som L och R i ett stereopar och detta ger en signifikant skillnad i nivå på direktljudtryck från L vs R vid lyssningsposition.
