16/07/2015-19:56:39
(Modification du message : 16/07/2015-19:57:36 par Dominique-Tanguy.)
RE: Pavillon 1" 450Hz Traktrix Kugelwellenhorn StereoLab
Pour être précis (nous sommes sur Melaudia), le pavillon est soit Tractrix, soit Kugelwellen. Il ne peut pas être les deux à la fois. Un petit extrait d'un article intėressant, malheureusement en anglais, trouvé ici :
http://kolbrek.hoyttalerdesign.no/index.php/horns/bem
"015 and 016: Spherical wave horn
Also known as the Kugelwellen horn or Klangfilm horn. It is sometimes confused with the tractrix (which also assumes spherical wave fronts), but they are different. The tractrix assumes wave fronts of constant radius, that are normal to the walls. The wave fronts expand in an almost exponential way. The Spherical wave horn also assumes wavefronts of constant radius but this radius is twice the radius used in tractrix horns, and the wave fronts are not assumed to be normal to the walls. Wave front area expansion is explicitly exponential. See my Horn Theory articles for details on the two curves. I believe Avantgarde uses a profile similar to this, but that is just speculation.
Anyway, here are two simulations of Spherical wave horns, one with baffle (015) and one without (016). Notice the smoother response and throat impedance with the horn in a baffle. "
Cela n'enlève rien aux qualitės de ce pavillon, un très bon choix.
Dominique
http://kolbrek.hoyttalerdesign.no/index.php/horns/bem
"015 and 016: Spherical wave horn
Also known as the Kugelwellen horn or Klangfilm horn. It is sometimes confused with the tractrix (which also assumes spherical wave fronts), but they are different. The tractrix assumes wave fronts of constant radius, that are normal to the walls. The wave fronts expand in an almost exponential way. The Spherical wave horn also assumes wavefronts of constant radius but this radius is twice the radius used in tractrix horns, and the wave fronts are not assumed to be normal to the walls. Wave front area expansion is explicitly exponential. See my Horn Theory articles for details on the two curves. I believe Avantgarde uses a profile similar to this, but that is just speculation.
Anyway, here are two simulations of Spherical wave horns, one with baffle (015) and one without (016). Notice the smoother response and throat impedance with the horn in a baffle. "
Cela n'enlève rien aux qualitės de ce pavillon, un très bon choix.
Dominique