| 摘要 |
The invention relates to an electro-acoustic to enclosure (10) comprising walls defining two cavities (1; 2), each provided with an aperture (11; 21) shut off by a loudspeaker (12; 22), noteworthy in that it is said to be “enclosed” and in that each cavity (1; 2) has a shape for which the intersection with any plane containing the central axis (X1-X1′; X2, X2′) of said loudspeaker (12; 22) is a portion of an ellipse (E1i; E2i), the major axes (X1i-X1i′; X2i-X2i′) of said ellipses (E1i; E2i) being substantially coincident with said central axis (X1-X1′; X2, X2′) of said loudspeaker (12; 22), said aperture (11; 21) being secant to said ellipses (E1i; E2i) in such a way that the second extreme points (P1i′; P2i′) of each ellipse (E1i; E2i) are situated in said aperture (11; 21). |
| 主权项 |
1. Electro-acoustic enclosure (10) comprising walls defining at least one cavity (1; 2) provided with an aperture (11; 21) shut off by at least one loudspeaker (12; 22) comprising a membrane wherein the front surface transmits a front wave and wherein the rear surface transmits a back wave, said loudspeaker (12; 22) thus being defined particularly by the position of the front acoustic center thereof for said front wave, by the position of the rear acoustic center (A1; A2) thereof for said back wave and by the central axis (X1-X1′; X2-X2′) thereof passing through the front and rear acoustic centers (A1; A2) wherein said electroacoustic enclosure (10) is sealed and devoid of vents and in that the shape of said cavity (1; 2) is such that the intersection thereof with any plane containing said central axis (X1-X1′; X2,X2′) of said loudspeaker (12; 22) is at least a portion of an ellipse (E1i; E1i) particularly characterized by a first focal point (F1i; F2i) and a second focal point (F1i′; F2i′) which are separate and a major axis (X1i-X1i′; X2i-X2i′) wherein the intersection with said ellipse (E1i; E2i) defines a first extreme point (P1i; P2i) and a second extreme point (P1i′; P2i′), distributed on either side of the first and second focal points (F1i, F1i′; F2i, F2i′), respectively, said major axes (X1i-X1i′; X2i-X2i′) of said ellipses (E1i; E2i) being arranged so as to be substantially coincident with said central axis (X1-X1′; X2,X2′) of said loudspeaker (12; 22), said aperture (11; 21) being secant with said ellipses (E1i; E2i) such that said second extreme points (P1i′; P2i′) of each ellipse (E1i; E2i) are situated on the other side of said aperture (11; 21) in relation to the cavity (1; 2), in that the cavity (1; 2) is arranged so that said first extreme points (P1i; P2i) are substantially coincident, said first focal points (F1i; F2i) are substantially coincident, and at least a portion of said second focal points (F1i′; F2i′) are distant, and in that said loudspeaker (12; 22) and said cavity (1; 2) are arranged so that said rear acoustic center (A1, A2) of said loudspeaker (12, 22) is situated between said second focal points (F1i′; F2i′) furthest from each other of said ellipses forming said cavity (1; 2) or coincident with one of said second focal points (F1i′; F2i′) furthest from each other. |
