Abstract: Some implementations involve obtaining a plurality of echo references, the plurality of echo references including at least one echo reference for each audio device of a plurality of audio devices in an audio environment, each echo reference corresponding to audio data being played back by one or more loudspeakers of one audio device of the plurality of audio devices. Some examples involve making an importance estimation for each echo reference of the plurality of echo references. Making the importance estimation may involve determining an expected contribution of each echo reference to mitigation of echo by at least one echo management system of at least one audio device of the audio environment. Some implementations involve selecting, based at least in part on the importance estimation, one or more selected echo references and providing the one or more selected echo references to the at least one echo management system.

Abstract: A semiconductor device package comprises a first substrate, a first electronic component, an encapsulant, and a feeding structure. The first substrate has a first surface and a second surface opposite the first surface. The first electronic component is disposed on the first surface of the first substrate. The encapsulant encapsulates the first electronic component on the first surface of the first substrate. The feeding structure is disposed on the second surface of the first substrate without covering.

Abstract: Systems and techniques are described herein for audio playback adjustment. For instance, a process can include receiving, by a first device via a proximity based communications system, an identifier associated with an audio playback device, determining that the first device has audio configuration information for the audio playback device, wherein the audio configuration information includes a set of sound effects for adjusting audio playback of the audio playback device, and transmitting, via the proximity based communications system, the audio configuration information for the audio playback device.

Abstract: An active noise cancellation (ANC) system is provided with at least one loudspeaker to project anti-noise sound within a passenger cabin of a vehicle in response to receiving an anti-noise signal and at least one microphone to provide an error signal indicative of noise and the anti-noise sound within the passenger cabin. An adaptive filter controller is programmed to filter the error signal to obtain a noise reduction ratio, and to adjust a step size and/or leakage parameter based on a comparison of the noise reduction ratio to a noise threshold. A controllable filter generates the anti-noise signal based on the adjusted step size and/or leakage parameter.

Abstract: A work machine includes microphones inside the housing. The microphones are configured to collect sound inside the housing, and output sound signals that are electrical signals corresponding to the collected sound. The sound includes an operating noise generated inside the housing due to motion of a machine. The microphones are arranged at different locations inside the housing. The work machine is configured to execute a process related to the operating noise based on the sound signals from the microphones.

Abstract: A wearable audio output device (e.g., headphones) having an open design that allows ambient noise to pass to a listener without physically isolating the listener from a surrounding environment. The device may include an open earcup design that may partially or completely surround the listener's ear, and in some examples a portion of the listener's head may be uncovered by the open earcup. To improve comfort, the device includes a floating audio component configured to generate output audio in a direction of the listener's ear without contacting the listener's ear. To reduce audio leakage into the environment, the floating audio component may include two audio transducers and perform beamforming to target the output audio toward the listener's ear and cancel the output audio in other directions. For example, the beamforming may cause constructive interference in one direction and destructive interference in all other directions.

Abstract: Systems and methods for social audio streaming may include (1) configuring, for a user participating in a media call with a group of additional users, a virtual visual surface that includes (i) an on-screen media call interface, presented within a viewable area of a display element of a device of the user, with a first set of user tiles, and (ii) an off-screen media call interface, positioned outside of the viewable area in a lateral direction relative to the viewable area, with a second set of user tiles and (2) spatializing an audio stream of an additional user, from the group of additional users, based on a position of the additional user's user tile within the virtual visual surface. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: Various aspects of the present disclosure generally relate to media systems. In some aspects, a media device may monitor, using a radio frequency (RF) sensor, an environment of the media device; determine, from a received RF signal obtained by the RF sensor, a user attribute of a user within the environment; and control an audio system, associated with the media device, to direct an audio beam toward or away from the user. Numerous other aspects are provided.

Abstract: An imaging apparatus includes an external-audio microphone that collects an external sound that occurs outside the imaging apparatus, a noise reference microphone that obtains drive noise of the imaging apparatus or an external apparatus connected to the imaging apparatus, a detection unit that detects a noise period during which the drive noise occurs, an updating unit that updates background noise based on an audio signal obtained by the noise reference microphone during a no-noise period determined by the detection unit as a period in which no noise occurs, a generation unit that generates an audio signal of the drive noise from the audio signal obtained by the noise reference microphone and the updated background noise, and a noise reduction unit that reduces the audio signal of the drive noise generated by the generation unit from the audio signal obtained by the external-audio microphone during the noise period.

Abstract: Embodiments include an audio system comprising a plurality of microphones disposed in an environment, wherein the plurality of microphones is configured to detect one or more audio sources, and generate location data indicating a location of each of the one or more audio sources relative to the plurality of microphones; and at least one processor communicatively coupled to the plurality of microphones, wherein the at least one processor is configured to receive the location data from the plurality of microphones, and define a plurality of audio pick-up regions in the environment based on the location data, the plurality of audio pick-up regions comprising a first audio pick-up region and a second audio pick-up region, wherein the plurality of microphones are configured to deploy a first lobe within the first audio pick-up region and a second lobe within the second audio pick-up region.

Abstract: The invention relates to a method for improving the sound quality of a sound reproduction or recording in a room, the method comprising the steps of measuring an impulse response that comprises the linear response of the room; performing a time domain analysis to determine the resonances of the room and for a chosen group of room resonances determining a corresponding group of filters that, when inserted in a sound reproduction or recording chain in said room will counteract the unwanted effect of said chosen group of room resonances on the sound quality of sound reproduction or recording made in the room.

Abstract: Methods and devices for repelling mosquitoes may operate by generating the beats of fore and hind pairs of dragonfly wings, which may be dragonfly wing beats in the form of pressure waves. Such beats may be generated using digital or analog circuitry. The digital beats may be recordings of synthesized or enhanced beats of dragonfly wings beating. The device may take the form of a button that may be worn or otherwise carried by a user.

Abstract: An electronic device is provided. The electronic device includes a device body, a first sound-emitting component, and a second sound-emitting component. the first sound-emitting component and the second sound-emitting component are both disposed in the device body. The first sound-emitting component emits a first ultrasonic wave The second sound-emitting component emits a second ultrasonic wave. A frequency of the first ultrasonic wave is different from that of the second ultrasonic wave. A first sound guide channel and a second sound guide channel are disposed in the device body. A first sound guide hole and a second sound guide hole are disposed at an outer surface of the device body. The first sound-emitting component is connected to the first sound guide hole through the first sound guide channel. The second sound-emitting component is connected to the second sound guide hole through the second sound guide channel.

Abstract: An example method includes receiving audio signals associated with virtual auditory space locations. Digital filters are selected based on the virtual auditory space locations. The digital filters include one or more notch filters including one or more center frequencies that are based on generally sigmoidal distributions of center frequencies as a function of virtual auditory space location. The notch filters are configured to produce one or more notches in frequency spectrums of audio signals when applied to the audio signals. The digital filters are applied to the audio signals to obtain processed audio signals. Output audio signals are generated based on the processed audio signals. The output audio signals are provided to devices for producing virtual auditory display sound.

Abstract: One embodiment provides a method comprising optimizing one or more stimuli parameters by applying machine learning to training data. The method further comprises determining, based on the one or more optimized stimuli parameters, stimuli for simultaneously exciting a plurality of speakers within a spatial area. The stimuli has a shortest possible duration that is accurate for simultaneous deconvolution of a plurality of impulse responses of the plurality of speakers. The method further comprises simultaneously exciting the plurality of speakers by providing the stimuli to the plurality of speakers at the same time for reproduction. The method further comprises simultaneously deconvolving the plurality of impulse responses based on the stimuli and one or more measurements of sound recorded during the reproduction and arriving at one or more microphones within the spatial area.

Abstract: A method performed by an audio system comprising a headset. The method sends a playback signal containing user-desired audio content to drive a speaker of the headset that is being worn by a user, receives a microphone signal from a microphone that is arranged to capture sounds within an ambient environment in which the user is located, performs a speech detection algorithm upon the microphone signal to detect speech contained therein, in response to a detection of speech, determines that the user intends to engage in a conversation with a person who is located within the ambient environment, and, in response to determining that the user intends to engage in the conversation, adjusts the playback signal based on the user-desired audio content.

Abstract: Fibers may be intertwined to form structures for electronic devices and other parts. Fibers may be intertwined using computer-controlled braiding, weaving, and knitting equipment. Binder materials may be selectively incorporated into the intertwined fibers. By controlling the properties of the intertwined fibers and the patterns of incorporated binder, structures can be formed that include antenna windows, sound-transparent and sound-blocking structures, structures that have integral rigid and flexible portions, and tubes with seamless forked portions. Fiber-based structures such as these may be used to form cables and other parts of headphones or other electronic device accessories, housings for electronic devices such as housings for portable computers, and other structures.

Abstract: A portable speaker is disclosed. The portable speaker includes a speaker, a light source, and a reflector. The speaker is adapted to produce sound. The light source is adapted to emit light. The reflector is adapted to redirect at least a portion of the light to illuminate one or more ground surfaces.

Abstract: A method of controlling a vibrational transducer, the method comprising: tracking a temperature metric of the vibrational transducer; and controlling a drive signal for the vibrational transducer, where the drive signal is limited to a value to protect the vibrational transducer from over excursion, and where said value is a function of the tracked temperature metric.

Abstract: An audio headset may receive a plurality of audio signals corresponding to plurality of surround sound channels. The headset may determine, via its audio processing circuitry, context and/or content of the audio signals. The audio processing circuitry may process the audio signals to generate stereo signals carrying one or more virtual surround channels, wherein the processing comprises automatically controlling, based on the context and the content of the audio signals, a simulated acoustic environment of the virtual surround channels.