Geometrical transducer arrangements
First Claim
1. An arrangement of electroacoustic transducers comprising in combination, a plurality of similar electroacustic transducers each having a central axis normal to a substantially planar, peripheral front surface, an annular frame member for each transducer, having a planar rear surface conforming approximately to said peripheral front surface of each said transducer and having an annular opening therein sized and shaped to correspond with the peripheral outline of a respective said transducer, means mounting and securing each said transducer with the peripheral front surfaces thereof abutting said planar rear surface of a respective frame member, attaching means extending outwardly from the sides of each said frame member adjacent the rear surface thereof, for angular attachment of adjacently disposed frame members one to the other to form a polyhedron whereby said frames are situated to define the faces of said polyhedron, said attachment occurring at equispaced locations around the perimeter of each of said frames and coaxial with the central axis, said attachment means disposing the planes of said frames in an equal angular relationship with one another whereby adjacent axes of said frames and corresponding transducers diverge at an approximately equal angle from a central point, said transducers being excited in phase.
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Abstract
High quality single or multiple channel sound dispersal is obtained through the arrangement of a plurality of similar speakers divergently mounted in an airtight frame with integral horns formed therein such that the central axis of each speaker is coaxial with a line normal to and projected from the center of each face of a polyhedron characterized by the tetrahedron, the hexahedron, the octahedron, the dodecahedron and the icosahedron. When the speakers thus arranged are excited in phase, a series of infinite acoustic baffles are created between adjacent speakers creating a series of exponential horns which disperse the sound energy as if from a point source to the walls, ceiling and floor of the listening room and then by reflection to the listener. The frame/horn component is manufactured of universal parts.
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Citations
17 Claims
- 1. An arrangement of electroacoustic transducers comprising in combination, a plurality of similar electroacustic transducers each having a central axis normal to a substantially planar, peripheral front surface, an annular frame member for each transducer, having a planar rear surface conforming approximately to said peripheral front surface of each said transducer and having an annular opening therein sized and shaped to correspond with the peripheral outline of a respective said transducer, means mounting and securing each said transducer with the peripheral front surfaces thereof abutting said planar rear surface of a respective frame member, attaching means extending outwardly from the sides of each said frame member adjacent the rear surface thereof, for angular attachment of adjacently disposed frame members one to the other to form a polyhedron whereby said frames are situated to define the faces of said polyhedron, said attachment occurring at equispaced locations around the perimeter of each of said frames and coaxial with the central axis, said attachment means disposing the planes of said frames in an equal angular relationship with one another whereby adjacent axes of said frames and corresponding transducers diverge at an approximately equal angle from a central point, said transducers being excited in phase.
- 10. An arrangement of electroacoustic speakers comprising in combination a plurality of similar electroacoustic speakers each having a central axis and a peripheral front surface, means mounting and securing said speakers divergently aligned on each face and equidistant from a point defined as the centre of a polyhedron selected from the group consisting of a tetrahedron, a hexahedron, a octahedron, a dodecahedron, an icosahedron, such that said central axis of each said transducer is coaxial with a line normal to and projected from the centre of each face of said polyhedron, said mounting means forming an airtight space and also forming a series of horns integrally with said mounting means, said horns having planar rear surfaces abutting and attached to the peripheral front surfaces of the respective said speakers, said horns expanding therefrom and meeting and joining those of said horns in angular adjacent relation thereto, said meeting and joining occurring on a series of mutually divergent cooperating planes, said planes being coaxial with said central axes and passing through the edges of said polyhedron, said planes radiating from the centre of said polyhedron and means for supporting the arrangement in a fixed position within a listening room, said integral mounting means and horn assembly being constructed of a number of universal parts defined as frame members constituting part of said horns, each of which is manufactured of suitably formable material such as wood, metal and plastic, each said frame member having a central axis and being provided with a planar rear surface and an opening provided therein sized and shaped to correspond with the peripheral outline of said speakers, said opening being coaxial with said central axis, said frame members also having planar side surfaces angles such that when said frame member is superimposed or said polyhedron coaxial to said line normal to and projected from the centre of a face of the polyhedron, said planar side surfaces are parallel to and in close adjacent relation to said mutually divergent cooperating planes whereby said frame member is attached to a respective frame member with their respective planar side surfaces mutually abutting, a configuration of smaller speakers being substituted for each said speaker, said smaller speakers being noninterferingly arranged approximately coplanar to and confined by the edges of the respective face of said polyhedron, said frame members being modified to provide each said smaller speaker with a coaxial horn integrally formed therwith, the planar rear surface of each said horn abutting and attached to each said smaller speaker at its respective peripheral front surface.
Specification