Abstract:
In general, in some aspects, a loudspeaker includes a horn including a first end panel, a second end panel, a first side panel, and a second side panel. Edges of at least the first and second side panels define a diffraction slot opening. A plurality of manifold components each has an output opening coupled to the diffraction slot opening. The output openings of the plurality of manifold components together constitute a diffraction slot source at the diffraction slot opening. A plurality of electro-acoustic transducers are each coupled to an input opening of one of the manifold components.
Abstract:
A line array loudspeaker system including a large number of small, regularly and closely spaced acoustical drivers. Each of the acoustical drivers receives essentially the same audio signal. In another embodiment, a line array includes a plurality of portable line array modules that are constructed and arranged to be attached end to end to form a longer line array.
Abstract:
In general, in some aspects, a loudspeaker includes a horn including a first end panel, a second end panel, a first side panel, and a second side panel. Edges of at least the first and second side panels define a diffraction slot opening. A plurality of manifold components each has an output opening coupled to the diffraction slot opening. The output openings of the plurality of manifold components together constitute a diffraction slot source at the diffraction slot opening. A plurality of electro-acoustic transducers are each coupled to an input opening of one of the manifold components.
Abstract:
A loudspeaker includes a horn including a first end panel, a second end panel, a first side panel, and a second side panel. Edges of at least the first and second side panels define a diffraction slot opening. The first and second side panels are each fabricated from a sheet of flexible material held in a stressed, curved shape by at least a rigid support member. The panels are designed by an automated process based on a number of electro-acoustic transducers to be used in a loudspeaker, horizontal and vertical coverage angles for the loudspeaker, and a wall length for a horn of the loudspeaker.
Abstract:
A loudspeaker includes a horn including a first end panel, a second end panel, a first side panel, and a second side panel. Edges of at least the first and second side panels define a diffraction slot opening. The first and second side panels are each fabricated from a sheet of flexible material held in a stressed, curved shape by at least a rigid support member. The panels are designed by an automated process based on a number of electro-acoustic transducers to be used in a loudspeaker, horizontal and vertical coverage angles for the loudspeaker, and a wall length for a horn of the loudspeaker.
Abstract:
A method and apparatus for determining the directivity index (DI) and directivity factor (Q) of a loudspeaker is described. A microphone is placed in the throat of a horn-type loudspeaker to measure the acoustical pressure at this point. A second microphone is placed along an extension of a central axis of a loudspeaker at a predetermined distance from the mouth of the loudspeaker to measure the acoustical pressure at this point. The output of each of the microphones is rectified and converted to decibel form. The decibel signal representing acoustical pressure at the throat is subtracted from the signal representing the measured pressure at the predetermined distance. A signal (in decibel form) representing the distance of the second microphone from the mouth of the horn is added to the difference signal and a signal (in decibel form) in accordance with the diameter of the loudspeaker throat is subtracted from the difference signal to provide a signal in accordance with directivity index. From the directivity index a signal in accordance with directivity factor (Q), which is a power ratio, can be derived.
Abstract:
The coil form for a loudspeaker voice coil is made of a material having high thermal conductivity. The coil form is attached to or integrally formed with a highly thermally conductive spider member which resiliently supports the coil form on the frame structure of the speaker, which also has high thermal conductivity. In one embodiment of the invention a heat sink member to facilitate the dissipation of the thermal energy is attached to the speaker frame structure. In an embodiment involving a horn type speaker, the horn element, which is made of a thermally conductive material, is attached to the speaker frame and also functions as a heat dissipator. In this manner, the likelihood of overheating of the speaker voice coil is greatly diminished.
Abstract:
A line array loudspeaker, including a first plurality of acoustic drivers each acoustic driver comprising an axis, the first plurality of acoustic drivers arranged so that the axes of first plurality of acoustic drivers are coplanar in a first plane and so that a straight line intersects each axis at a same position on each of the first plurality of acoustic drivers, and a second plurality of acoustic drivers each acoustic driver comprising an axis, the second plurality of acoustic drivers arranged so that the axes of second plurality of acoustic drivers are coplanar in a second plane and so that the straight line intersects each axis at a same position on each of the second plurality of acoustic drivers, in which the first plurality and the second plurality arranged so that the first plane intersects with the second plane along a straight intersection line.
Abstract:
A line array electroacoustical transducing system includes at least first and second line arrays detachably secured in electrical and mechanical coupling relationships. The assembly may be detachably secured to a base having an amplifier in electrical and mechanical coupling relationships.