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: 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: 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: 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: 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: 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: Provided is a sound processing method performed by a computer, the method comprising generating a DJ transform spectrogram indicating estimated pure-tone amplitudes for respective frequencies corresponding to natural frequencies of a plurality of springs and a plurality of time points by modeling an oscillation motion of the plurality of springs having different natural frequencies, with respect to an input sound, and calculating the estimated pure-tone amplitudes for the respective natural frequencies; calculating degrees of fundamental frequency suitability based on a moving average of the estimated pure-tone amplitudes or a moving standard deviation of the estimated pure-tone amplitudes with respect to each natural frequency of the DJ transform spectrogram; and extracting the fundamental frequency based on local maximum values of the degrees of fundamental frequency suitability for the respective natural frequencies at each of the plurality of time points.

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: Provided is a technique for selecting a cancellation filter coefficient that can stably cancel noise for a user using a seat of an aircraft, an automobile, or the like. A cancellation filter coefficient selection apparatus includes: a recording unit configured to record cancellation filter coefficients; a seat position acquisition unit configured to acquire a position of a seat used by a user; and a cancellation filter coefficient selection unit configured to, from among the cancellation filter coefficients recorded in the recording unit, select a cancellation filter coefficient corresponding to the position of the seat as a cancellation filter coefficient to be used in filtering for generating a cancellation signal for cancelling noise at a position where quiet is desired, based on a reference signal output by a reference microphone configured to collect noise in a predetermined space.

Abstract: An apparatus, method and computer program for signaling change events at an audio output device are disclosed. The apparatus may include circuitry for detecting, during an audio communications session between a first user device and a second user device, a change event at a first earphones device associated with the first user device, the first earphones device included of first and second earphones. The apparatus may also include circuitry for signaling the detected change event to the second user device and/or a second audio output device associated with the second user device.

Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.

Abstract: Disclosed herein are system, method, and computer program product embodiments for visualizing sound coverage in a venue. An embodiment operates by receiving audio content from an audio source, determining audio signal properties of the audio content, where the audio signal properties comprise one or more spectral, temporal, spatial components (e.g., energy, spectrum or directivity), receiving an audio system configuration of loudspeakers or sound beams of a venue, visualizing the audio signal based on a mapping of an intersection of a unique volumetric beam of colored light, representing the spectral, temporal, spatial components, with a portion of the venue and displaying the visualized audio signal as a virtual representation of sound coverage of the portion of the venue.

Abstract: A receiver control method and device, and an electronic device are provided. The electronic device includes at least one receiver, wherein the at least one receiver is electrically connected to a baseband circuit, and a feedback circuit is arranged between at least one receiver and the baseband circuit. The receiver control method includes: detecting the at least one receiver; and in a case of detecting that a first receiver of the at least one receiver is blocked, adjusting an electrical signal gain of the feedback circuit corresponding to the first receiver to reduce an electrical signal input to the first receiver.

Abstract: A device, system, and method for machine-learning based noise suppression is provided. The device (and/or system) comprises a microphone, an output device, a noise suppression engine and a machine-learning noise suppression engine. The machine-learning noise suppression engine receives audio data from the noise suppression engine or the microphone, applies machine learning algorithms to the audio data to generate machine-learning based noise suppression parameters, and provides the parameters to the noise suppression engine. The noise suppression engine receives the audio data from the microphone and, prior to receiving the parameters, applies non-machine-learning based noise suppression to the audio data to generate noise-suppressed audio data, and provides the noise-suppressed audio data to the output device.

Abstract: A two-way radio device for hearing protection devices provides communication capabilities to users wearing hearing protection devices, which would ordinarily hinder or block communication. The two-way radio device removably attaches to a portion of a hearing protection device and connects to the speakers thereof. One or more wireless transceivers provide wireless transmission of audio between users of hearing protection devices enhanced with the two-way radio device. Users remain protected by their hearing protection devices and while communicating freely in high decibel environments.

Abstract: Various implementations include audio devices and methods for noise reduction control in wearable audio devices and/or vehicle audio systems. Certain implementations include a non-occluding wearable audio device having: at least one electro-acoustic transducer; at least one microphone; and a control system coupled with the at least one electro-acoustic transducer and the at least one microphone, the control system programmed to: adjust an active noise reduction (ANR) setting for audio output to the at least one electro-acoustic transducer in response to detecting use of the non-occluding wearable audio device in a vehicle.

Abstract: A headphone device including (i) a first and second earpiece, (ii) a headbow adjustably connecting the first and second earpiece, wherein the first and/or the second earpiece is extendable from the headbow, and wherein the headbow includes (a) an inner cavity and (b) a fastener positioned within the inner cavity at a midpoint of the headbow, and (iii) a cable assembly including a cable formed into a sinusoidal pattern when the cable assembly is in a resting position, the cable assembly extending between the first and second earpieces and positioned within the inner cavity in the resting position such that the cable assembly is extendable within the inner cavity from the resting position when the first and/or second earpieces are extended from the headbow, and wherein a midpoint of the cable assembly is fixed, within the inner cavity, at the midpoint of the headbow via the fastener.

Abstract: Provided is a target sound extraction technique based on a steering vector generation method enabling instability in a calculation to be prevented when a neural network is trained by using an error back propagation method to reduce an estimation error of a beamformer. A target sound signal generation apparatus generates a target sound signal yt,f corresponding to a target sound included in an observed sound from an observed signal vector xt,f corresponding to the observed sound collected by using a plurality of microphones. The target sound signal generation apparatus includes a mask generation unit, a steering vector generation unit, a beamformer vector generation unit, and a target sound signal generation unit. The mask generation unit is configured as a neural network trained by using an error back propagation method.