Abstract: Various embodiments of the present technology comprise a method and apparatus for a microphone system. Various embodiments of the present technology may comprise a first microphone connected to a first high pass filter and a second microphone connected to a second high pass filter. The microphone system may further comprise a frequency controller configured to selectively activate the first high pass filter and the second high pass filter according to detected wind noise. The first and second high pass filters may be arranged to filter sound data from the first and second microphone prior to processing the sound data using beamforming.

Abstract: Aspects describe a nozzle including a first flexible portion and a second rigid portion. The rigid portion is less flexible than the flexible portion. When positioned in a user's ear, the flexible portion extends a section of the earbud housing towards an ear canal of a user and the rigid portion couples a removable sealing structure to the earbud housing. In aspects, the flexible portion provides comfort by allowing a sealing structure to flex and accommodate a wearer's ear and the rigid portion provides structure for the feedback microphone to be placed close to the user's ear canal for ANR.

Abstract: A patient monitor can diagnose whether its speaker is blocked, malfunctioning, or at a volume that is too low. For example, the monitor can include a processor that can diagnose the speaker by recording a microphone input signal. The processor can compare the microphone input signal to an expected alarm signal that should be output by the speaker. If the two do not match or reasonably correspond to one another, then the processor may increase the volume of the alarm to determine whether doing so can overcome an obstruction, noise, or potential malfunction. The microphone can again detect the speaker output, and the processor can again make another comparison or analysis of the input with the speaker output. If the speaker output as detected via the microphone is still insufficiently loud, then the patient monitor may output an indication that the speaker has a problem.

Abstract: In general, techniques are described by which to embed enhanced audio transports in backward compatible bitstreams. A device comprising a memory and one or more processors may be configured to perform the techniques. The memory may store the backward compatible bitstream, which conforms to a legacy transport format. The processor(s) may obtain, from the backward compatible bitstream, legacy audio data that conforms to a legacy audio format, and obtain, from the backward compatible bitstream, extended audio data that enhances the legacy audio data. The processor(s) may also obtain, based on the legacy audio data and the extended audio data, enhanced audio data that conforms to an enhanced audio format, and output the enhanced audio data to one or more speakers.

Abstract: The present invention relates to a hearing device adapted to be positioned in an ear canal of a user, the hearing device comprising a receiver unit, a positioning member adapted to position and hold the hearing device in the ear canal of a user, and a vibration preventing arrangement adapted to prevent vibrations of a least part of the positioning member.

Abstract: An apparatus configured, based on virtual reality content for viewing in virtual reality, the virtual reality content comprising visual content for display in a three dimensional virtual reality space and spatial audio content comprising audio for presentation such that it is audibly perceived to originate from one or more particular directions in the virtual reality space corresponding to one or more points or regions in the visual content, the virtual reality content defining at least a ground level of said virtual reality space; and based on display of a birds-eye view of the virtual reality space to a user comprising a view of the visual content substantially downward towards said ground level from a point of view location in said virtual reality space elevated from said ground level; to provide for presentation of said spatial audio content with a spatial audio modification, the spatial audio modification configured to modify the one or more particular directions from which the user perceives the spatial

Abstract: Ambisonic audio is converted to binaural audio based on head related impulse responses (HRIRs) associated with sound sources located symmetric with respect to a head of a listener. The HRIRs associated with sound sources located symmetric with respect to the head of the listener are mapped to HRIR pairs associated with sound sources located on one side of the head of the listener based on the symmetry of the sound source locations. A sequence of HRIRs based on the mapped left HRIRs or a sequence of HRIRs based on the mapped right HRIRs are input into a spherical harmonics converter which outputs respective left spherical harmonics or right spherical harmonics. Ambisonic audio is binauralized based on the left spherical harmonics and the right spherical harmonics.

Abstract: A panel bottom member includes a light absorbing member, a top bonding layer which is positioned at the top of the light absorbing member, a first vibration sound element which is positioned below the light absorbing member and bonded to the light absorbing member, a buffer member which is positioned below the light absorbing member and does not overlap with the first vibration sound element, and an interlayer bonding layer which is positioned between the light absorbing member and the buffer member.

Abstract: A system and method for the detection of drowning within a body of water, the detection is provided by signal processing of acoustic signals obtained from within the body of water of acoustic signals received from an array of hydrophone submerged within the body of water.

Abstract: An audio processing apparatus includes a digital filter, a signal combiner, and a dynamic-range processor (DRP). The digital filter is configured to receive a filter-input audio signal and to filter the filter-input audio signal, so as to produce a filter-output audio signal. The signal combiner is configured to combine the filter-input audio signal with the filter-output audio signal, so as to produce a combined audio signal. The DRP is configured to apply to the filter-output audio signal a dynamic-range correction that depends non-linearly on the combined audio signal.

Abstract: The present disclosure provides methods, devices and computer program products for encoding and decoding of a vector of parameters in an audio coding system. The disclosure further relates to a method and apparatus for reconstructing an audio object in an audio decoding system. According to the disclosure, a modulo differential approach for coding and encoding a vector of a non-periodic quantity may improve the coding efficiency and provide encoders and decoders with less memory requirements. Moreover, an efficient method for encoding and decoding a sparse matrix is provided.

Abstract: A circuit includes a digital-to-analog conversion circuit, an amplifying circuit, a mixing circuit, and an analog-to-digital converter. The digital-to-analog conversion circuit is configured to receive and convert audio data in the digital domain and output audio data in the analog domain. The audio data includes a main-tone component. The amplifying circuit is configured to output an audio signal according to the audio data in the analog domain. The mixing circuit is configured to eliminate the main-tone component according to the audio data in the analog domain and the audio signal and to output a feedback signal. The analog-to-digital converter is configured to convert the feedback signal from the analog domain to the digital domain.

Abstract: A power output circuit supplies an audio power output signal that is adjusted to prevent clipping when needed based on an estimate of available energy from the power supply supplying the power output circuit. The power output circuit may be an audio power output circuit that generates an audio power output signal from samples of an audio program that are stored in a buffer. A processing block determines an energy requirement for producing the audio power output signal from the audio program and adjusts an amplitude of the audio power output signal in conformity with the determined energy requirement and an available energy determined for the power supply so that the audio power output signal is reproduced without clipping of the audio power output signal.

Abstract: Embodiments disclosed herein include headphone devices with spatially diverse antennas employing multiple operational modes and antenna switching policies. The headphone device may identify a current mode of operation and wirelessly communicate with at least one external device based at least in part on the current mode of operation. Further, operating in a first mode of operation, the headphone device may cause switching circuitry to selectively couple a first antenna to the common port in accordance with a first antenna switching policy. While operating in the second mode of operation, the headphone device may cause circuitry to selectively couple a second antenna to the common port in accordance with a second antenna switching policy that is different from the first antenna switching policy.

Abstract: A head-worn audio system includes a support frame, a first contact element configured to contact a first portion of a head of a user, a first actuator coupled to the support frame and configured to move the first contact element, a first sensor configured to generate a first sensor signal indicating a first state of the first contact element and a second sensor signal indicating a second state of the first contact element, and a processor. The processor is communicatively coupled to the first actuator and the first sensor and is configured to cause the first actuator to move the first contact element from a first position that corresponds to the first state to a second position that corresponds to the second state, wherein, in the second state, the first contact element is in contact with the head of the user.

Abstract: The present application discloses a detection method and a detection device for the audio signal, the detection method comprising one or multiple times of audio detection, the audio signal is a SPDIF signal, and each time of the audio detection comprises: a statistical sampling step, sampling the SPDIF signal based on Biphase Mark Code, and counting according to the sampled data to obtain the number of state changes or the number of state unchanges of the SPDIF signal; and a determination step, determining whether the SPDIF signal is a muted SPDIF signal according to whether the number of state changes or the number of state unchanges of the SPDIF signal is within a predetermined range. The purpose of this application is at least to achieve the music detection function of the audio signal without performing full signal decoding on the SPDIF signal.

Abstract: A method for calculating excursion of a diaphragm of a speaker, which includes: calculating a DC resistance based on a feedback signal of the speaker; calculating an impedance based on the feedback signal and the DC resistance; calculating a transfer function between a signal and a velocity of the diaphragm of the speaker based on the DC resistance, the impedance, and a force factor; and calculating the excursion of the diaphragm of the speaker based on an input signal and the transfer function.

Abstract: There is disclosed in one example an audio processor, including: an audio crossover to separate a first frequency band from a second frequency band, the first frequency band having a lower frequency band than the second frequency band; an excursion estimator to estimate from information of the first frequency band a predicted excursion of a low-frequency driver; an interpolator to interpolate an adjustment to the second frequency band to compensate for the estimated excursion; and circuitry to drive the adjusted second frequency to a receiver.

Abstract: The disclosure provides a system, comprising: a MEMS capacitive transducer, comprising one or more first capacitive plates coupled to a first node and one or more second capacitive plates coupled to a second node; biasing circuitry coupled to the first node, operable to provide a biasing voltage to the one or more first capacitive plates; and test circuitry coupled to the second node, operable to: selectively apply one or more current sources to the second node, so as to charge and discharge the MEMS capacitive transducer and so vary a signal based on a voltage at said second node between an upper value and a lower value; determine a parameter that is indicative of a time period of the variation of the signal; and determine a capacitance of the MEMS capacitive transducer based on the parameter that is indicative of the time period.

Abstract: A system and method for detecting the occurrence of a gunshot are provided. The method may include receiving acoustic signals at a microphone indicative of a magnitude of the acoustic signal at a plurality of discrete frequencies, converting the acoustic signals to a digital signal and then employing a Goertzel algorithm based digital signal filter on the digital signal to produce Goertzel magnitudes at the plurality of discrete frequencies. The method subsequently determines if a maximum value of the digital signal is higher than a predefined threshold value. If the threshold value is exceeded, the method predicts if the Goertzel magnitudes at the plurality of discrete frequencies are indicative of a gunshot sound via gradient boosting; and, transmits a signal indicative of a gunshot occurrence after predicting if a possible gunshot event has occurred. A debouncer may also be utilized to suppress duplicative signals.