Abstract: An electro-acoustic transducer with a diaphragm with a front side and a rear side, the diaphragm configured to radiate front side acoustic radiation from its front side and rear side acoustic radiation from its rear side. There is a magnet, and a magnetic circuit that defines a path for magnetic flux of the magnet and comprises a gap, wherein the magnetic circuit comprises a pole piece. A voice coil is located in the magnetic circuit gap and configured to move the diaphragm. A basket is supported by the magnetic circuit. The basket supports the diaphragm. There are first and second openings in the basket. The first and second basket openings are both configured to receive one of the front side acoustic radiation and rear side acoustic radiation. The first opening is spaced from the second opening. The first opening has a greater acoustic resistance than the second opening.

Abstract: An eyeglass headphone with a frame that is constructed and arranged to be carried by the head of a wearer, the frame comprising a bridge that is adapted to be supported by the wearer's nose, and a left temple and a right temple that extend rearwardly from the bridge, toward the left and right ears of the wearer, respectively, and a dipole loudspeaker built into the frame, where the dipole loudspeaker comprises a driver that emits front-side acoustic radiation from its front side, and emits rear-side acoustic radiation from its rear side. The frame comprises at least first and second sound-emitting openings, wherein the first sound-emitting opening is constructed and arranged to emit front-side acoustic radiation and the second sound-emitting opening is constructed and arranged to emit rear-side acoustic radiation.

Abstract: An eyeglass headphone with a frame that is constructed and arranged to be carried by the head of a wearer, the frame comprising a bridge that is adapted to be supported by the wearer's nose, and a left temple and a right temple that extend rearwardly from the bridge, toward the left and right ears of the wearer, respectively, and a dipole loudspeaker built into the frame, where the dipole loudspeaker comprises a driver that emits front-side acoustic radiation from its front side, and emits rear-side acoustic radiation from its rear side. The frame comprises at least first and second sound-emitting openings, wherein the first sound-emitting opening is constructed and arranged to emit front-side acoustic radiation and the second sound-emitting opening is constructed and arranged to emit rear-side acoustic radiation.

Abstract: An acoustic device that is adapted to be worn on the body of a user. The acoustic device has an array of acoustic transducers comprising at least three acoustic radiating surfaces, and a controller that is adapted to provide array control signals that independently control the relative phases and amplitudes of each of the transducers.

Abstract: An apparatus includes an enclosure capable of receiving a transducer for converting electrical signals into audible signals. The apparatus also includes one or more structures within the enclosure defining one or more channels, each channel having one end located within the enclosure and another end that is external to the enclosure. The apparatus also includes an acoustic resistive element located in the one of the one or more structures, the acoustic resistive element being capable of changing the acoustic characteristics of at least one of the one or more channels within the enclosure.

Abstract: An apparatus includes an enclosure capable of receiving an array of transducers for converting electrical signals into steered audible signals. The apparatus also includes one or more structures within the enclosure defining a port having one end located within the enclosure and another end that is external to the enclosure. The apparatus also includes an acoustic resistive element located in the one of the one or more structures, the acoustic resistive element being capable of reducing effects of the acoustic characteristics of the port for audible signals being produced by the array of transducers.

Abstract: An acoustic device that is adapted to be worn on the body of a user. The acoustic device has an array of acoustic transducers comprising at least three acoustic radiating surfaces, and a controller that is adapted to provide array control signals that independently control the relative phases and amplitudes of each of the transducers.

Abstract: An apparatus includes an enclosure capable of receiving a transducer for converting electrical signals into audible signals. The apparatus also includes one or more structures within the enclosure defining one or more channels, each channel having one end located within the enclosure and another end that is external to the enclosure. The apparatus also includes an acoustic resistive element located in the one of the one or more structures, the acoustic resistive element being capable of changing the acoustic characteristics of at least one of the one or more channels within the enclosure.

Abstract: An apparatus includes an enclosure capable of receiving an array of transducers for converting electrical signals into steered audible signals. The apparatus also includes one or more structures within the enclosure defining a port having one end located within the enclosure and another end that is external to the enclosure. The apparatus also includes an acoustic resistive element located in the one of the one or more structures, the acoustic resistive element being capable of reducing effects of the acoustic characteristics of the port for audible signals being produced by the array of transducers.

Abstract: A system and method for reducing baffle vibration includes balancing an inertial force generated by two or more moving diaphragms and balancing an acoustic pressure acting on a housing supporting the two or more moving diaphragms such that a net force acting on the baffle is substantially zero. The acoustic force acting on the housing may be balanced independently of the inertial force balance. In another configuration, the acoustic force acting on the housing may be balanced by a non-zero net inertial force.

Abstract: A system and method for reducing baffle vibration includes balancing an inertial force generated by two or more moving diaphragms and balancing an acoustic pressure acting on a housing supporting the two or more moving diaphragms such that a net force acting on the baffle is substantially zero. The acoustic force acting on the housing may be balanced independently of the inertial force balance. In another configuration, the acoustic force acting on the housing may be balanced by a non-zero net inertial force.