Abstract: A circuit includes a cross-talk compensation component including a power profile reconstruction component for reconstructing the power profile of a digital microphone coupled to a microelectromechanical (MEMS) device, wherein the power profile represents power consumption of the digital microphone over time between at least two operational modes of the digital microphone, and a reconstruction filter for modeling thermal and/or acoustic properties of the digital microphone; and a subtractor having a first input for receiving a signal from the digital microphone, a second input coupled to the cross-talk compensation component, and an output for providing a digital output signal.

Abstract: Provided is an active acoustic control program that can reduce noise in a vehicle interior irrespective of the vehicle type, due to being installed in a device that is easily available to anyone. This active acoustic control program is downloaded using a communicator that transmits and receives data to and from a server, and this program causes a computation process device to execute a process for generating a control signal that causes a canceling sound to be outputted from a speaker provided in an interior of a vehicle in order to reduce noise in the vehicle interior. Said program is provided with an adaptive notch filter that processes a reference signal as an adaptive signal to generate a control signal, and a control filter coefficient update unit that continuously updates a filter coefficient of the adaptive notch filter so that an error signal is minimized.

Abstract: An electronic hearing protection system includes an electronic hearing device having a housing that is disposed in a recessed cavity in an earplug. The housing of the electronic hearing device is configured to be rotatable between multiple positions, including a first position in which a speaker of the electronic hearing device aligns with a sound tube in the earplug to permit sound generated by the speaker to travel through the sound tube to the user's ear canal, and a second position in which the housing blocks the sound tube to at least partially prevent sound from reaching the user's ear canal.

Abstract: A head-related transfer function, HRTF, dataset modification system, the system including an HRTF identifying unit operable to identify a first HRTF from an HRTF dataset, a filter generating unit operable to generate a filter in dependence upon the first HRTF, and an HRTF modification unit operable to modify the first HRTF by applying the generated filter to generate an output HRTF, where the generating comprises the steps of: identifying a spectral response of the first HRTF, identifying a plurality of second HRTFs within the HRTF dataset, each within a predetermined distance of the first HRTF, and a spectral response associated with each of the second HRTFs, generating an average of each of the identified spectral responses of the first and second HRTFs, and generating a filter using the inverse of this average.

Abstract: A pair of Bluetooth glasses is revealed. The Bluetooth glasses includes a glasses body with a first assembly portion disposed on a rear end of a temple thereof, a Bluetooth earphone having a second assembly portion arranged at a front end of an earphone body thereof, and a connection member. The second assembly portion is mounted into one end of a sleeve of the connection member while the first assembly portion on the temple is mounted into the other end of the sleeve. Thereby the temple is assembled with the Bluetooth earphone conveniently and various combinations of materials such as metals and plastic are used to increase Bluetooth glasses styles. Moreover, an adjustment knob is mounted to the earphone body of the Bluetooth earphone for switching between a front broadcast hole and a rear broadcast hole through which sounds from a speaker are output.

Abstract: Method and apparatus for improving the performance, response, and durability of an electro-hydraulic active suspension system. The noise caused by hydraulic flow ripple is reduced and system response is improved.

Abstract: An acoustic control system includes a peripheral wall provided so as to surround a seat, and an upper portion of the peripheral wall being opened, a speaker provided inside the peripheral wall and capable of outputting a reproduced sound from a sound source, a microphone provided toward an outside of the peripheral wall and configured to collect an environmental sound around the peripheral wall, and a processor. The processor configured to suppresse a level of the reproduced sound in a predetermined frequency band from the speaker based on the environmental sound collected by the microphone.

Abstract: A method for self-calibrating a sound pickup process that uses a microphone array in a wearable device that also includes a loudspeaker, where the microphone array being in a physical arrangement with respect to the loudspeaker. The method obtains, for each of several microphones of the microphone array, one or more transfer functions that each represent a response of the microphone to sound from a position in an acoustic space. The method determines whether a physical arrangement of the microphone array with respect to the loudspeaker has changed and adjusts the transfer function, for at least one of the microphones of the several microphones, in response to determining that the current physical arrangement of the microphone array with respect to the loudspeaker has changed.

Abstract: Disclosed is a method of presenting audio information to a user. The method comprising receiving samples of a waveform from a media handling component, initializing a biquad filter with a set of one or more coefficients corresponding to a set of one or more stages of the biquad filter for both a real component of the samples and an imaginary component of the samples. The biquad filter is implemented on a media processing component of the mobile media device. The method further comprises applying the biquad filter to the samples of the waveform to generate an output for presentation to the user, the output comprising a processed rendering of the real component of the samples and the imaginary component of the samples.

Abstract: A microphone has a MEMS device, a driver, and a control unit. The MEMS device outputs a first electrical signal according to an acoustic pressure. The driver vibrates the MEMS device by a drive signal. The control unit calculates a correction value for correcting the first electric signal based on a second electric signal output from the MEMS device when the MEMS device is vibrated by the drive signal.

Abstract: A method (600) of operating a binaural ear level audio system in order to improve speech intelligibility and a binaural ear level audio system adapted to carry out said method.

Abstract: According to one embodiment, a transducer includes: a first conductive member; a substrate forming a first space with the first conductive member; a second conductive member opposed to the first conductive member via the substrate, and forming a second space with the substrate; first conductors electrically connecting the first conductive member with the second conductive member; a first transmission conductor in at least one of the first/the second spaces; and a second transmission conductor in at least one of the first space or the second space, and separated from the first transmission conductor, wherein the second conductive member includes a through hole through the second conductive member in a direction opposed to the first conductive member, and connecting to the second space, and an orthogonal projection of the through hole in the direction includes at least portion of each of the first/the second transmission conductor.

Abstract: The present document relates to audio coding systems. In particular, the present document relates to efficient methods and systems for parametric multi-channel audio coding. An audio encoding system configured to generate a bitstream indicative of a downmix signal and spatial metadata for generating a multi-channel upmix signal from the downmix signal is described. The system comprises a downmix processing unit configured to generate the downmix signal from a multi-channel input signal; wherein the downmix signal comprises m channels and wherein the multi-channel input signal comprises n channels; n, m being integers with m<n. Furthermore, the system comprises a parameter processing unit configured to determine the spatial metadata from the multi-channel input signal.

Abstract: A measurement method includes generating a plurality of second measurement signals by disposing a plurality of first measurement signals corresponding to each of the plurality of speakers in respective different time zones on a time axis, generating a plurality of third measurement signals by copying a portion of a back end of each of the plurality of second measurement signals and adding the portion to a front end of each of the plurality of second measurement signals, outputting sounds according to each of the plurality of third measurement signals from each of the plurality of speakers, collecting the sounds with a microphone, and calculating a plurality of impulse responses corresponding to the plurality of first measurement signals, based on the collected sound signal collected with the microphone and the plurality of third measurement signals.

Abstract: A transportation vehicle provides a workspace in a passenger cabin to support a teleconference with a remote party. External sensors are configured to scan the exterior of the vehicle and detect a pedestrian. A sound exciter is configured to generate a masking noise directed to the exterior. A control circuit which enhances privacy of the teleconference is configured to A) detect the audio content of the teleconference being present in the interior of the vehicle, B) quantify an interior sound level of the audio content, C) estimate a discernibility of the audio content at an external location corresponding to the detected pedestrian, and D) activate the sound exciter such that the masking noise is adapted to mask the audio content at the external location.

Abstract: A device can receive an audio signal and determine a measure of correlation between the audio signal and a microphone signal. The audio signal can be attenuated based on the measure of correlation. The audio signal can be used to drive one or more speakers of the device. Other aspects are described and claimed.

Abstract: An audio signal processing method includes obtaining an audio signal of a sound source, performing first filter processing on the audio signal to generate an imaginary sound source of a virtual space, performing second filter processing on the audio signal to adjust a tone of the imaginary sound source, and outputting an initial reflected sound control signal generated by using the audio signal on which the first filter processing and the second filter processing have been performed, in a first case where the first filter processing is performed before the second filter processing, the first filter processing is performed on the audio signal, and the second filter processing is performed on the audio signal on which the first filter processing has been performed, and in a second case where the second filter processing is performed before the first filter processing, the second filter processing is performed on the audio signal, and the first filter processing is performed on the audio signal on which the seco

Abstract: A circuit for driving a capacitive load includes an amplifier for driving the load based on an input signal, the amplifier comprising at least a boost converter, a dynamic model configured to track a capacitance of the load and a voltage of the source for powering at least parts of the circuit, an adaptive filter, configured to filter the input signal based on an output of the dynamic model.

Abstract: According to an embodiment, a sound emitting apparatus includes a helical hollow tube and at least three sound wave sources. The helical hollow tube helically extends in a circumferential direction to form an annular shape as a whole. The first helical hollow tube includes a plurality of openings. The at least three sound wave sources are coupled to the first helical hollow tube and are configured to supply a sound wave to the first helical hollow tube.

Abstract: One embodiment provides a method comprising determining stimuli for simultaneously exciting a plurality of speakers within a spatial area. 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 recording, during the reproduction, one or more measurements of sound arriving at one or more microphones within the spatial area. The method further comprises simultaneously deconvolving a plurality of impulse responses of the plurality of speakers based on the stimuli and the one or more measurements.