Abstract: One embodiment provides a computer-implemented method that includes sending a stimulus signal to a loudspeaker. A measurement signal is received via a microphone. The stimulus signal is transformed into a stimulus time-frequency representation. The measured signal is transformed into a measured time-frequency representation. At least one frequency value is selected between the stimulus time-frequency representation and the measured time-frequency representation. Correlation analysis is performed using the selected at least one frequency value. Based on the correlation analysis, a statistical mode is determined to produce a start-time of the stimulus signal.

Abstract: One embodiment provides a method that includes optimizing a shape for a port tube of a speaker device by varying a portion of multiple initial port tube design parameters and iteratively repeating an execution of a simulation computing process that simulates shear measure until the execution of the simulation computing process minimizes the simulated shear measure and outputs a final port tube design for an improved port tube having an optimized central portion and an optimized flare shape of at least one flared exit based on multiple final port tube design parameters for an improved shape for the port tube that maximally delays an onset of turbulence and flow separation for improved low frequency output for the speaker device. The improved port tube is generated using the multiple final port tube design parameters.

Abstract: One embodiment provides a method of audio upmixing comprising performing video scene analysis by segmenting visual objects from video frames of a video, and performing audio analysis by extracting audio signals from an audio corresponding to the video. The method further comprises determining whether any of the audio signals correspond to any of the visual objects, and estimating a video-based trajectory of a visual object if the visual object is in motion and transitions from on-screen to off-screen, or vice versa, during the video. The method further comprises positioning an audio trajectory of an audio signal from at least one speaker associated with the display to at least one other speaker associated with providing surround sound. The audio trajectory is automatically matched with the video. The audio signal is delivered to the at least one speaker and the at least one other speaker for audio reproduction during the presentation.

Abstract: One embodiment provides a computer-implemented method that includes receiving a trigger sound from a primary listening location. The trigger sound being received at multiple speakers in a synchronous network at different times. The trigger sound is recognized at the multiple speakers. A respective relative delay is determined based on a time differential function that determines time differences. Sound quality for the multiple speakers is improved based on the respective relative delay for each of the multiple speakers.

Abstract: One embodiment provides a slim acoustic transducer with a diaphragm that is substantially centered on a vertical axis. A first top plate is substantially perpendicular to the vertical axis. The first top plate houses a first upper magnet. A first bottom plate is substantially perpendicular to the vertical axis. The first bottom plate houses a first lower magnet. A voice coil has a height parallel to the vertical axis. The voice coil is at least partially disposed within the first top plate and at least partially disposed within the first bottom plate.

Abstract: One embodiment provides a slim acoustic transducer with a diaphragm that is substantially centered on a vertical axis. A first top plate is substantially perpendicular to the vertical axis. The first top plate houses a first upper magnet. A first bottom plate is substantially perpendicular to the vertical axis. The first bottom plate houses a first lower magnet. A voice coil has a height parallel to the vertical axis. The voice coil is at least partially disposed within the first top plate and at least partially disposed within the first bottom plate.

Abstract: One embodiment provides a slim acoustic transducer with a diaphragm including a hole that is substantially centered on a vertical axis of the diaphragm. The hole has a first horizontal width. A voice coil has a ring shape that is disposed at least partially within the hole and substantially centered on the vertical axis. The ring shape has an outer and inner horizontal width. The outer horizontal width is smaller than or equal to the first horizontal width of the hole. A column structure is disposed at least partially within the ring shape and substantially centered on the vertical axis. The column structure has a second horizontal width that is smaller than or equal to the inner horizontal width of the ring shape. The column structure includes an upper magnet, a middle plate disposed below the upper magnet and a lower magnet disposed below the middle plate.

Abstract: One embodiment provides a method that includes receiving, by a processor, port tube design parameters for a port tube for a speaker device. The method further includes predicting, by the processor, pressure and pressure gradients by performing a numerical simulation process based on the port tube design parameters. The processor further determines a measure of shear within the port tube and at exits of the port tube based on the predicted pressure and pressure gradients. The method additionally includes updating, by the processor, the port tube design parameters and repeating performing the numerical simulation and the determining of the measure of shear until a minimized shear measure result is determined.

Abstract: One embodiment provides a speaker device comprising a first housing including a first top surface comprising a first opening, a first recessed mounting surface spaced below the first opening, and a first recessed sidewall extending upwardly from the first recessed mounting surface to the first opening to form a first waveguide. The speaker device further comprises a first upward-facing driver mounted into the first recessed mounting surface. The first waveguide shapes propagation of acoustic energy generated by the first upward-facing driver to project the acoustic energy out of the speaker device in an upwardly inclined direction.

Abstract: One embodiment provides a slim acoustic transducer with a diaphragm including a hole that is substantially centered on a vertical axis of the diaphragm. The hole has a first horizontal width. A voice coil has a ring shape that is disposed at least partially within the hole and substantially centered on the vertical axis. The ring shape has an outer and inner horizontal width. The outer horizontal width is smaller than or equal to the first horizontal width of the hole. A column structure is disposed at least partially within the ring shape and substantially centered on the vertical axis. The column structure has a second horizontal width that is smaller than or equal to the inner horizontal width of the ring shape. The column structure includes an upper magnet, a middle plate disposed below the upper magnet and a lower magnet disposed below the middle plate.

Abstract: An omni-directional speaker includes a speaker enclosure including a sound wave exit configured to emit sound waves omni-directionally. A transducer is coupled to the speaker enclosure. The transducer including a speaker diaphragm coupled to a mounting plate. A phase plug directs sound to the sound wave exit. The phase plug including a first portion that extends outwards toward an exterior of the speaker enclosure.

Abstract: One embodiment provides a method comprising determining an actual elevation of a sound source. The actual elevation is indicative of a first location at which the sound source is physically located relative to a first listening reference point. The method further comprises determining a desired elevation for a portion of an audio signal. The desired elevation is indicative of a second location at which the portion of the audio signal is perceived to be physically located relative to the first listening reference point. The desired elevation is different from the actual elevation. The method further comprises, based on the actual elevation, the desired elevation and the first listening reference point, modifying the audio signal, such that the portion of the audio signal is perceived to be physically located at the desired elevation during reproduction of the audio signal via the sound source.

Abstract: A speaker system includes a speaker driver configured to cause speaker cone displacement based on a driver voltage input. A controller is configured to generate the driver voltage input to the speaker driver. The controller includes: a feedforward control path configured to generate a nominal voltage input based on a nonlinear model of electroacoustic dynamics of the speaker driver and an input audio signal.

Abstract: One embodiment provides a method comprising determining an actual elevation of a sound source. The actual elevation is indicative of a first location at which the sound source is physically located relative to a first listening reference point. The method further comprises determining a desired elevation for a portion of an audio signal. The desired elevation is indicative of a second location at which the portion of the audio signal is perceived to be physically located relative to the first listening reference point. The desired elevation is different from the actual elevation. The method further comprises, based on the actual elevation, the desired elevation and the first listening reference point, modifying the audio signal, such that the portion of the audio signal is perceived to be physically located at the desired elevation during reproduction of the audio signal via the sound source.

Abstract: One embodiment provides a method comprising determining an actual elevation of a sound source. The actual elevation is indicative of a first location at which the sound source is physically located relative to a first listening reference point. The method further comprises determining a desired elevation for a portion of an audio signal. The desired elevation is indicative of a second location at which the portion of the audio signal is perceived to be physically located relative to the first listening reference point. The desired elevation is different from the actual elevation. The method further comprises, based on the actual elevation, the desired elevation and the first listening reference point, modifying the audio signal, such that the portion of the audio signal is perceived to be physically located at the desired elevation during reproduction of the audio signal via the sound source.

Abstract: One embodiment provides a sound apparatus comprising a plurality of driver units arranged linearly in an end-fire array, and for each driver unit, a corresponding digital filter for individual digital signal processing of signals received by the driver unit.

Abstract: One embodiment provides a method comprising determining an actual elevation of a sound source. The actual elevation is indicative of a first location at which the sound source is physically located relative to a first listening reference point. The method further comprises determining a desired elevation for a portion of an audio signal. The desired elevation is indicative of a second location at which the portion of the audio signal is perceived to be physically located relative to the first listening reference point. The desired elevation is different from the actual elevation. The method further comprises, based on the actual elevation, the desired elevation and the first listening reference point, modifying the audio signal, such that the portion of the audio signal is perceived to be physically located at the desired elevation during reproduction of the audio signal via the sound source.

Abstract: An omni-directional speaker includes a speaker enclosure including a sound wave exit configured to emit sound waves omni-directionally. A transducer is coupled to the speaker enclosure. The transducer including a speaker diaphragm coupled to a mounting plate. A phase plug directs sound to the sound wave exit. The phase plug including a first portion that extends outwards toward an exterior of the speaker enclosure.

Abstract: One embodiment provides an omnidirectional loudspeaker comprising a phase plug and an acoustic resonator within the phase plug. The acoustic resonator comprises acoustic damping material.

Abstract: A speaker includes a speaker enclosure including a peripheral sound wave exit to emit sound waves peripherally. A driver is connected to the speaker enclosure. The driver includes a speaker cone having an outer portion connected to a mounting plate that is disposed adjacent the peripheral sound wave exit. A phase plug includes a first portion positioned substantially parallel and adjacent to part of the speaker cone and a second portion that extends outwards toward a circumference of the speaker enclosure.