Abstract: A loudspeaker assembly for use in a vehicle, the vehicle including a cabin and one or more cabin walls, the assembly including a plurality of drivers fitted to a common enclosure, the enclosure including a vent duct passing through a cabin wall of a vehicle such that one side of the loudspeaker assembly is in acoustic communication with a volume of air external to the cabin of the vehicle and the other side of the loudspeaker assembly is in acoustic communication with air in the cabin of the vehicle.

Abstract: Apparatus for managing and/or reducing harmonic distortion arising with an audio signal including a phase generator for generating at least one phase-difference signal or a reference audio signal generated by the phase generator, wherein the or each constant phase difference is adapted to provide cancellation of the harmonic distortion components arising along the signal path. Respective amplifier channels for receiving and separately amplifying the audio signal acting as a reference audio signal are also provided as are respective loudspeaker channels for receiving and separately producing sound corresponding to the amplified audio wherein each loudspeaker channel has substantially equal performance parameters and is adapted to radiate the sound relative to other loudspeaker channels to produce a combined sound that corresponds to the audio signal with harmonic distortion components that are reduced compared to the harmonic distortion components arising along the signal path.

Abstract: An amplifier circuit is disclosed suitable for feeding a loudspeaker system having plural drivers. The amplifier circuit has an output stage and plural output connectors such that there is an output connector for each driver, wherein the output stage is connected separately to each output connector for independent connection to each driver. A method of feeding a loudspeaker system having plural drivers with an amplifier circuit having an output stage is also disclosed.

Abstract: A loudspeaker system for a vehicle may include a vehicle partition panel that separates an interior space and an exterior space; a loudspeaker device comprising a frame, a diaphragm elastically supported at the frame, and a driving device that is configured to provide driving power for operating the diaphragm; and an air chamber disposed between the diaphragm and the vehicle partition panel. The frame delimits a chamber side opening of the air chamber facing the vehicle partition panel, where the vehicle partition panel comprises a vehicle partition panel opening. The vehicle partition panel opening has an extension which is smaller than the diameter of the diaphragm and smaller than an extension of the chamber side opening. The loudspeaker device is fixed to the vehicle partition panel such that the chamber side opening and the vehicle partition panel opening overlap in an overlapping area and the chamber side opening adjoins the vehicle partition panel opening.

Abstract: The transparent conductive film includes on a transparent film base a transparent electrode layer in which a transparent conductive oxide layer and a patterned metal layer are stacked in contact with each other. The maximum layer thickness of the transparent electrode layer is 300 nm or less. The metal layer has a metal pattern width of 1 ?m or more and 8 ?m or less, and the metal pattern coverage ratio of 0.4% or more and 3.2% or less. It is preferable that the metal layer has a layer thickness of 50 nm or more and 250 nm or less. It is also preferable that the pattern shape of the metal layer is of stripes, mesh, dots or the like.

Abstract: Forms of a vehicle loudspeaker system may include: a vehicle interior space defined on an inner side of a front windshield, a vehicle exterior storage space defined on a front side of the vehicle interior space such that a partition is disposed between the vehicle exterior storage space and the vehicle interior space, a cowl box disposed between an upper end of the partition and a lower end of the front windshield, and a loudspeaker including a diaphragm. The loudspeaker may be disposed in the cowl box such that sound pressure generated by the diaphragm is emitted to the vehicle interior space.

Abstract: A loudspeaker system for a vehicle may include a vehicle partition panel that separates an interior space and an exterior space; a loudspeaker device comprising a frame, a diaphragm elastically supported at the frame, and a driving device that is configured to provide driving power for operating the diaphragm; and an air chamber disposed between the diaphragm and the vehicle partition panel. The frame delimits a chamber side opening of the air chamber facing the vehicle partition panel, where the vehicle partition panel comprises a vehicle partition panel opening. The vehicle partition panel opening has an extension which is smaller than the diameter of the diaphragm and smaller than an extension of the chamber side opening. The loudspeaker device is fixed to the vehicle partition panel such that the chamber side opening and the vehicle partition panel opening overlap in an overlapping area and the chamber side opening adjoins the vehicle partition panel opening.

Abstract: Forms of a vehicle loudspeaker system may include: a vehicle interior space defined on an inner side of a front windshield, a vehicle exterior storage space defined on a front side of the vehicle interior space such that a partition is disposed between the vehicle exterior storage space and the vehicle interior space, a cowl box disposed between an upper end of the partition and a lower end of the front windshield, and a loudspeaker including a diaphragm. The loudspeaker may be disposed in the cowl box such that sound pressure generated by the diaphragm is emitted to the vehicle interior space.

Abstract: An amplifier circuit is disclosed suitable for feeding a loudspeaker system having plural drivers. The amplifier circuit has an output stage and plural output connectors such that there is an output connector for each driver, wherein the output stage is connected separately to each output connector for independent connection to each driver. A method of feeding a loudspeaker system having plural drivers with an amplifier circuit having an output stage is also disclosed.

Abstract: Disclosed is an installation structure for a loudspeaker system in a vehicle, the loudspeaker system being installed in a vehicle front space separated from a vehicle interior by a partition, the vehicle front space being anterior to the vehicle interior, the installation structure including a sound guide port extending through the partition. The sound guide port allows a sound output space of a diaphragm in the loudspeaker system to communicate with front part of the vehicle interior.

Abstract: A loudspeaker assembly is disclosed for use in a loudspeaker system having infinite baffle topology. The assembly comprises a driver including a cone and a basket and at least one Helmholtz resonator including a chamber and a vent duct communicating with the chamber and adapted to pass through the infinite baffle. The chamber is dimensioned to provide a tuned frequency well above an operating band associated with the driver. The cross sectional area and length of the vent duct may be set to provide control over duct air noise and low frequency extension. A method of tuning a loudspeaker assembly for use in a loudspeaker system having infinite baffle topology is also disclosed.

Abstract: A loudspeaker assembly is disclosed for use in a loudspeaker system having infinite baffle topology. The assembly comprises a driver including a cone and a basket and at least one Helmholtz resonator including a chamber and a vent duct communicating with the chamber and adapted to pass through the infinite baffle. The chamber is dimensioned to provide a tuned frequency well above an operating band associated with the driver. The cross sectional area and length of the vent duct may be set to provide control over duct air noise and low frequency extension. A method of tuning a loudspeaker assembly for use in a loudspeaker system having infinite baffle topology is also disclosed.