Abstract: A system and method for accurately estimating engine noise at a virtual microphone location, such as an occupant's ear position, in an acoustic space in order to enhance performance of an Engine Order Cancellation (EOC) system is provided. A set of weights and transfer functions that are dependent on various vehicle parameters, such as frequency, load, and speed, may be employed to estimate noise at a position where there are no physical microphones present. The accurate estimation of engine noise at virtual location, such as an occupant's ear position, may be achieved using a frequency dependent weighted sum of filtered and unfiltered error signals measured at microphones mounted at various locations inside an acoustic space, such as a vehicle cabin, which may not be located near virtual location.

Abstract: Provided are an actuator fixing device and a panel vibration type sound-generating display device including the same. A display device includes: a display panel configured to display an image, a cover bottom configured to cover the display panel, and a plurality of sound-generating actuators supported by the cover bottom, the sound-generating actuators being configured to vibrate the display panel to generate sound, at least two of the sound-generating actuators being adjacent to each other.

Abstract: Methods and systems encoding a stereo audio signal having a left channel and a right channel are disclosed. The system includes a downmixer for generating a downmix signal and a residual signal from the stereo audio signal in selected frequency bands representing only part of a used audio frequency range of the stereo audio signal, and a decision module for selecting, in a time variant manner, either left/right perceptual encoding or mid/side perceptual encoding. The system also includes a parameter estimator for estimating stereo parameters for reconstructing a stereo image of a portion of the stereo audio signal, and a perceptual encoder for performing either left/right perceptual encoding or mid/side perceptual encoding based on the selecting to generate an encoded output signal. Finally, the system includes a bitstream generator for creating a bitstream signal comprising the encoded output signal.

Abstract: An electronic device receives audio from an audio source and outputs the audio via speakers of the device. While outputting the audio via the speakers, the device senses its surrounding environment, and adjusts its operation, based on the sensed environment, to alert a listener wearing the device. The adjustment may comprise generation of one or more audio, visual, and/or vibration notifications to the listener using the device. A volume of the audio output via the speakers may be adjusted based on the sensed surrounding environment. The device may detect whether a first condition is present in the surrounding environment, decrease the volume when the first condition is detected in the surrounding environment, and increase the volume when the first condition is not detected in the surrounding environment.

Abstract: In general, various aspects of the techniques are directed to audio rendering for low frequency effects. A device comprising a memory and a processor may be configured to perform the techniques. The memory may store audio data representative of a soundfield. The processor may analyze the audio data to identify spatial characteristics of low frequency effects components of the soundfield, and process, based on the spatial characteristics, the audio data to render a low frequency effects speaker feed. The processor may also output the low frequency effects speaker feed to a low frequency effects capable speaker.

Abstract: A vehicle headrest includes an electro-acoustic transducer and an acoustic enclosure. The acoustic enclosure defines an acoustic chamber. The acoustic enclosure supports the electro-acoustic transducer such that a rear radiating surface of the electro-acoustic transducer radiates acoustic energy into the acoustic chamber. A cushion member is coupled to the acoustic enclosure for supporting a user's head. A grille member overlies a front radiating surface of the electro-acoustic transducer. The grille member is formed of a 3D printed lattice.

Abstract: Apparatus for managing and/or reducing harmonic distortion arising with an audio signal including a phase generator for generating at least one phase-difference signal or a reference audio signal generated by the phase generator, wherein the or each constant phase difference is adapted to provide cancellation of the harmonic distortion components arising along the signal path. Respective amplifier channels for receiving and separately amplifying the audio signal acting as a reference audio signal are also provided as are respective loudspeaker channels for receiving and separately producing sound corresponding to the amplified audio wherein each loudspeaker channel has substantially equal performance parameters and is adapted to radiate the sound relative to other loudspeaker channels to produce a combined sound that corresponds to the audio signal with harmonic distortion components that are reduced compared to the harmonic distortion components arising along the signal path.

Abstract: In at least one embodiment, an apparatus for generating a simulated vehicle sound is provided. At least one parameter module receives a first driver throttle signal and to transmit a first input signal indicative of a first simulated vehicle sound. An engine sound generator block audibly generates a first simulated vehicle sound in response to the first input signal. An engine sound removal block is operably coupled to a microphone that receives a first microphone input signal. The first microphone input signal includes first environmental noise associated with a vehicle exterior environment and the first simulated vehicle sound. The engine sound removal block is configured to filter the first simulated vehicle sound from the first microphone input signal to determine the first environmental noise. The engine sound generator generates a second simulated vehicle sound that is louder than the first environmental noise.

Abstract: A sound signal processor includes a memory storing instructions and a processor configured to implement the stored instructions to execute a plurality of tasks, the tasks including a receiving task configured to receive audio information, a sound source position setting task configured to set position information of a sound source based on the received audio information, and a sound image localization processing task configured to calculate an output level of a sound signal of the sound source for a plurality of speakers to thereby perform sound image localization processing of the sound source to localize a sound image of the sound source in a sound image localization position based on the set position information.

Abstract: A context-aware voice guidance method is provided that interacts with other voice services of a user device. The voice guidance does not provide audible guidance while the user is making a verbal request to any of the voice-activated services. Instead, the voice guidance transcribes its output on the screen while the verbal requests from the user are received. In some embodiments, the voice guidance only provides a short warning sound to get the user's attention while the user is speaking on a phone call or another voice-activated service is providing audible response to the user's inquires. The voice guidance in some embodiments distinguishes between music that can be ducked and spoken words, for example from an audiobook, that the user wants to pause instead of being skipped. The voice guidance ducks music but pauses spoken words of an audio book in order to provide voice guidance to the user.

Abstract: A speaker device in an embodiment includes a panel and an actuator. The actuator is provided on the panel. The actuator includes a diaphragm, a piezoelectric element, and a vibration transmission portion. The piezoelectric element is provided on at least one of principal surfaces of the diaphragm. The vibration transmission portion is provided on the diaphragm and abuts the panel without making contact with the piezoelectric element.

Abstract: A device for reducing or eliminating an ability of a smart device to hear or react to audible communications can include a base and a cover movable with respect to the base between an open position and a closed position. In the closed position the cover and the base combine to form an enclosed cavity that is sized and shaped to receive a smart device therein and reduce or eliminate an ability of the smart device to hear or react to audible communications. The device can be manual, mechanical and/or automatic and can be responsive to physical input(s) and/or one or more verbal or audible commands.

Abstract: A microphone is provided. The microphone includes a shell with an accommodating cavity, as well as a micro-electro-mechanical system chip and a control circuit chip accommodated in the accommodating cavity, where the shell is provided with a sound hole penetrating through a thickness of the shell and communicated with the accommodating cavity; the microphone further includes an electric anti-dust device at least completely covering the sound hole, the electric anti-dust device is electrically connected with the control circuit chip, and can open the sound hole when receiving a power-on signal of the control circuit chip and close the sound hole when not receiving the power-on signal of the control circuit chip, thus effectively improving a pollution problem of the microphone during such process as transportation, assembly, SMT or unused state that dust is fed most easily without affecting an acoustic performance.

Abstract: An audio signal processing method. The audio signal processing method includes: acquiring a first stereo audio signal; splitting the first stereo audio signal into 5.1-channel audio signals; obtaining processed 5.1-channel audio signals by processing the 5.1-channel audio signals based on a speaker box parameter of a three-dimensional surround 5.1-channel virtual speaker box; and synthesizing the processed 5.1-channel audio signals into a second stereo audio signal.

Abstract: A method for producing a diffuse field that is non-localizable and without timbre inaccuracies. A processor receives an audio bitstream containing an at least one surround channel. The surround channel is rendered as an at least one virtualized line array source. Timbre correction is applied to the virtualized line array source. Other aspects are also described and claimed.

Abstract: The application relates to audio encoder and decoder systems. An embodiment of the encoder system comprises a downmix stage for generating a downmix signal and a residual signal based on a stereo signal. In addition, the encoder system comprises a parameter determining stage for determining parametric stereo parameters such as an inter-channel intensity difference and an inter-channel cross-correlation. Preferably, the parametric stereo parameters are time- and frequency-variant. Moreover, the encoder system comprises a transform stage. The transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding is selectable. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-variant.

Abstract: To enable multichannel audio data to be transmitted favorably. Multichannel audio data of a predetermined number of channels is acquired. The multichannel audio data has a sampling frequency corresponding to the predetermined number of channels. Audio data of the respective channels configuring the multichannel audio data are sequentially transmitted to a reception side via a predetermined transmission channel for each unit audio data. Information indicating the sampling frequency is added to the transmission audio data.

Abstract: In general, techniques are described by which to perform spatial relation coding using virtual higher order ambisonic coefficients. A device comprising a memory and a processor may perform the techniques. The memory may be configured to store audio data, the audio data representative of zero-ordered higher order ambisonic (HOA) coefficient, and one or more greater-than-zero-ordered HOA coefficients. The processor may be configured to obtain, based on the one or more greater-than-zero-ordered HOA coefficients, a virtual zero-ordered HOA coefficient. The processor may also be configured to obtain, based on the virtual HOA coefficient, one or more parameters from which to synthesize the one or more greater-than-zero-ordered HOA coefficients. The processor may further be configured to generate a bitstream that includes a first indication representative of the zero-ordered HOA coefficients, and a second indication representative of the one or more parameters.

Abstract: To a hinge pillar including a hinge pillar inner and a hinge pillar outer that form a closed cross-section extending vertically, a speaker box configured to hold and house a speaker therein is joined and fixed. As necessary, the speaker box includes a box part formed of a sheet metal member including a bottom and side walls that form a housing space housing the speaker, together with the bottom. The box part is arranged in the opening, with the bottom located in the closed cross-section and with the housing space open inside a vehicle cabin, and is joined to an edge of the opening.

Abstract: In general, techniques are described by which to perform spatial relation coding of higher order ambisonic coefficients using expanded parameters. A device comprising a memory and a processor may perform the techniques. The memory may be configured to store at least a portion of a bitstream, the bitstream including a first indication representative of an HOA coefficient associated with the spherical basis function having an order of zero, and a second indication representative of one or more parameters. The processor may be configured to perform parameter expansion with respect to the one or more parameters to obtain one or more expanded parameters, and synthesize, based on the one or more expanded parameters and the HOA coefficient associated with the spherical basis function having the order of zero, one or more HOA coefficients associated with one or more spherical basis functions having an order greater than zero.