Abstract: An electroacoustic diaphragm comprises a membrane, and an electrically conductive circuit carried by the membrane, such that a segment of the electrically conductive circuit is divided into two or more separate subcircuits. An electroacoustic transducer assembly comprises a frame, the novel diaphragm supported on the frame, and a magnetic element disposed adjacent the novel diaphragm whereby the transducer achieves uniform force distribution across the novel diaphragm. An audio device comprises a housing having an acoustic opening and the electroacoustic transducer including the novel diaphragm. Methods for constructing a transducer comprises determining the flux density of a magnetic field and configuring a diaphragm with separate subcircuits to correlate or inversely correlate to the flux density.

Abstract: Devices, methods, and systems are described for an anti-feedback audio device (100) comprising a dipole speaker (110) having an acoustically null sound plane (115) or acoustically null sound area (117), a first microphone (120) disposed substantially within the acoustically null sound plane (115) or acoustically null sound area (117), and a neural network (130) communicatively coupled to the dipole speaker and the first microphone (120) such that a first output from the first microphone is communicated to the neural network (130) for processing, and a second output from the neural network (130) is communicated to the dipole speaker (110). The combination of the dipole phase cancellation and the neural network gives an unexpected result of an extremely high signal-to-noise ratio for speech over noise.

Abstract: An electroacoustic transducer assembly includes an electrostatic diaphragm having a surface. The diaphragm includes a film of flexible insulating material and electrically conductive material within the film to achieve a uniform electrical resistivity over the surface.

Abstract: An electroacoustic diaphragm comprises a membrane, and an electrically conductive circuit carried by the membrane, such that a segment of the electrically conductive circuit is divided into two or more separate subcircuits. An electroacoustic transducer assembly comprises a frame, the novel diaphragm supported on the frame, and a magnetic element disposed adjacent the novel diaphragm whereby the transducer achieves uniform force distribution across the novel diaphragm. An audio device comprises a housing having an acoustic opening and the electroacoustic transducer including the novel diaphragm. Methods for constructing a transducer comprises determining the flux density of a magnetic field and configuring a diaphragm with separate subcircuits to correlate or inversely correlate to the flux density.

Abstract: An electroacoustic transducer assembly includes an electrostatic diaphragm having a surface. The diaphragm includes a film of flexible insulating material and electrically conductive material within the film to achieve a uniform electrical resistivity over the surface.

Abstract: Active noise control (ANC), including active and adaptive noise cancellation (ANC) with non-voice-coil transducers having highly linear transfer functions, such as planar transducers, planar magnetic transducers, electro-static transducers, and piezo-electric transducers. This active and adaptive noise cancellation (ANC) may be used with: planar transducer headphones and earphones; open-backed and closed-back headphones and earphones; in-ear earphones, and phase plugs.

Abstract: Phase plugs (70) and related audio devices (100, 105) and methods comprise various compression members (2), and guides (120) extending from the compression members (2) to tips (84), are configured such that central axes (93, 99) defined perpendicular to compression members (2) and/or diaphragms (94) are asymmetric and/or non-axisymmetric to the central axes (93, 99).

Abstract: A multi-diaphragm planar magnetic electro-acoustic transducer is provided, having a plurality of diaphragms arranged in one or more diaphragm modules. Each diaphragm comprises a substrate and at least one electrically conductive circuit on at least one surface of the substrate. Each diaphragm module comprises at least one diaphragm, each held taut by a frame. Each diaphragm module is disposed to one side or the other of at least one planar magnetic array, the diaphragm module being parallel to and aligned with the planar magnetic array to form the multi-diaphragm planar magnetic transducer. The planar magnets many have a vertical arrangement, a sideways arrangement, a staggered arrangement, and may comprise stators and/or a low reluctance backing plate or channel piece. The planar magnet arrays can be linear or circular.

Abstract: Active noise control (ANC), including active and adaptive noise cancellation (ANC) with non-voice-coil transducers having highly linear transfer functions, such as planar transducers, planar magnetic transducers, electro-static transducers, and piezo-electric transducers. This active and adaptive noise cancellation (ANC) may be used with: planar transducer headphones and earphones; open-backed and closed-back headphones and earphones; in-ear earphones, and phase plugs.

Abstract: A multi-diaphragm planar magnetic electro-acoustic transducer is provided, having a plurality of diaphragms arranged in one or more diaphragm modules. Each diaphragm comprises a substrate and at least one electrically conductive circuit on at least one surface of the substrate. Each diaphragm module comprises at least one diaphragm, each held taut by a frame. Each diaphragm module is disposed to one side or the other of at least one planar magnetic array, the diaphragm module being parallel to and aligned with the planar magnetic array to form the multi-diaphragm planar magnetic transducer. The planar magnets many have a vertical arrangement, a sideways arrangement, a staggered arrangement, and may comprise stators and/or a low reluctance backing plate or channel piece. The planar magnet arrays can be linear or circular.

Abstract: Phase plugs (70) and related audio devices (100, 105) and methods comprise various compression members (2), and guides (120) extending from the compression members (2) to tips (84), are configured such that central axes (93, 99) defined perpendicular to compression members (2) and/or diaphragms (94) are asymmetric and/or non-axisymmetric to the central axes (93, 99).

Abstract: A multi-diaphragm planar magnetic electro-acoustic transducer is provided, having a plurality of diaphragms arranged in one or more diaphragm modules. Each diaphragm comprises a substrate and at least one electrically conductive circuit on at least one surface of the substrate. Each diaphragm module comprises at least one diaphragm, each held taut by a frame. Each diaphragm module is disposed to one side or the other of at least one planar magnetic array, the diaphragm module being parallel to and aligned with the planar magnetic array to form the multi-diaphragm planar magnetic transducer. The planar magnets many have a vertical arrangement, a sideways arrangement, a staggered arrangement, and may comprise stators and/or a low reluctance backing plate or channel piece. The planar magnet arrays can be linear or circular.

Abstract: Non-axisymmetric and horn-free phase plugs [70] and related audio devices [100, 200] include various compression members [2] such that central axes [93, 99] are defined perpendicular thereto; and such that a guide [120] extends from a compression member [2] to a phase plug tip [84], wherein the guide [120] is non-axisymmetric to the central axes [93, 99].

Abstract: A conductive circuit of a thin film for using in a planar magnetic transducer, where the conductive circuit is created from laser etching, including laser ablation or laser delamination of portions of a conductive material disposed on a diaphragm substrate. The conductive circuit so formed has varied widths, height, or spacing throughout the diaphragm, allowing for adaptation to certain desired performance characteristics. Performance characteristics include a uniform force distribution on the diaphragm, creating very high impedance circuits, increasing current in the circuit, increasing force, and increasing efficiency.

Abstract: An array of paired bar magnets (200) provides a reinforced magnetic field (203) on a first side and a nearly canceled magnetic field (204) on a second side of each pair. The array may be a planar array (600) with a plurality of parallel, coplanar pairs (620). The array may provide air gaps between consecutive pairs, and within individual pairs, to provide improved transparency to sound. The array may be doubled (700), with the reinforced fields (713) of one half of the array opposing the reinforced fields (723) of the other half to produce a more intense field (730). In another configuration, the array may be doubled (800) with the nearly canceled fields of one pair facing the nearly canceled fields of the other, producing an array with reinforced fields (801-804) on four sides.

Abstract: An array of paired bar magnets (200) provides a reinforced magnetic field (203) on a first side and a nearly canceled magnetic field (204) on a second side of each pair. The array may be a planar array (600) with a plurality of parallel, coplanar pairs (620). The array may provide air gaps between consecutive pairs, and within individual pairs, to provide improved transparency to sound. The array may be doubled (700), with the reinforced fields (713) of one half of the array opposing the reinforced fields (723) of the other half to produce a more intense field (730). In another configuration, the array may be doubled (800) with the nearly canceled fields of one pair facing the nearly canceled fields of the other, producing an array with reinforced fields (801-804) on four sides.

Abstract: An anti-diffraction plate for including in a planar magnetic transducer. The anti-diffraction plate includes anti-diffraction structures for positioning adjacent to magnets of the planar magnetic transducer. By introducing a shape over top surface of the magnets, the anti-diffraction structures cause the elimination of diffraction patterns as a main audio wavefront passes by the magnets from a diaphragm. A diffusion structure for diffusing reflected sound waves, the diffusion structures reducing or eliminating the power and capacity of the reflected sound waves to create interference patterns with oncoming sound waves.

Abstract: An anti-diffraction plate for including in a planar magnetic transducer. The anti-diffraction plate includes anti-diffraction structures for positioning adjacent to magnets of the planar magnetic transducer. By introducing a shape over top surface of the magnets, the anti-diffraction structures cause the elimination of diffraction patterns as a main audio wavefront passes by the magnets from a diaphragm. A diffusion structure for diffusing reflected sound waves, the diffusion structures reducing or eliminating the power and capacity of the reflected sound waves to create interference patterns with oncoming sound waves.

Abstract: A multi-diaphragm planar magnetic electro-acoustic transducer is provided, having a plurality of diaphragms arranged in one or more diaphragm modules. Each diaphragm comprises a substrate and at least one electrically conductive circuit on at least one surface of the substrate. Each diaphragm module comprises at least one diaphragm, each held taut by a frame. Each diaphragm module is disposed to one side or the other of at least one planar magnetic array, the diaphragm module being parallel to and aligned with the planar magnetic array to form the multi-diaphragm planar magnetic transducer. The planar magnets many have a vertical arrangement, a sideways arrangement, a staggered arrangement, and may comprise stators and/or a low reluctance backing plate or channel piece. The planar magnet arrays can be linear or circular.

Abstract: A conductive circuit of a thin film for using in a planar magnetic transducer, where the conductive circuit is created from laser etching, including laser ablation or laser delamination of portions of a conductive material disposed on a diaphragm substrate. The conductive circuit so formed has varied widths, height, or spacing throughout the diaphragm, allowing for adaptation to certain desired performance characteristics. Performance characteristics include a uniform force distribution on the diaphragm, creating very high impedance circuits, increasing current in the circuit, increasing force, and increasing efficiency.