Abstract: An audio system, including at least one approximating circuit, the at least one approximating circuit configured to apply an approximated gain to the input signal, the least one approximating circuit outputting an approximated signal; a limiter configured to reduce a magnitude of the input signal by a gain determined by an amount the magnitude of the approximated filtered signal exceeds a predetermined threshold, the limiter outputting a limited input signal; a filter being respectively configured to receive the limited input signal and to respectively apply a filter gain, the filters outputting a plurality of filtered signals, wherein the approximated gain is substantially similar to the filter gain of one of the plurality of equalization filters; and a speaker array comprising a plurality of speakers, each speaker configured to receive a respective filtered signal of the plurality of filtered signals and to transduce the filtered signal to an audio signal.

Abstract: Provided is a processing device capable of, on the basis of data prepared by a recorder that only has recording function, acquiring information related to a time when the data was prepared. The processing device includes an acquisition unit for acquiring the recorded audio data, and an identification unit for detecting a sound signal that is included in the audio data and transmitted from an information transmission device and allows the time at which the signal was recorded to be identified, and identifying the time when other signals included in the audio data were recorded on the basis of the sound signal.

Abstract: A loudspeaker assembly comprises an enclosure having a first end and a second end, the first end including an opening; an acoustic driver at the second end of the enclosure; an acoustic volume between the first end and the second of the enclosure; a circuit board at the first end of the enclosure; a firebox covering the opening at the first end of the enclosure, the firebox providing a convection flow path in the acoustic volume over heat-generating components of the circuit board; and a heat sink extending from the circuit board in a direction away from the acoustic volume for providing a conduction flow path through the circuit board.

Abstract: In general, techniques are described by which to render different portions of audio data using different renderers. A device comprising a memory and one or more processors may be configured to perform the techniques. The memory may store audio renderers. The processor(s) may obtain a first audio renderer of the plurality of audio renderers, and apply the first audio renderer with respect to a first portion of the audio data to obtain one or more first speaker feeds. The processor(s) may next obtain a second audio renderer of the plurality of audio renderers, and apply the second audio renderer with respect to a second portion of the audio data to obtain one or more second speaker feeds. The processor(s) may output, to one or more speakers, the one or more first speaker feeds and the one or more second speaker feeds.

Abstract: A method for processing a 3D audio effect and related products are provided. The method includes the following. In a VR scenario, eight first positions of eight monaural sound sources and eight pieces of monaural data corresponding to the eight monaural sound sources are obtained, where the eight monaural sound sources correspond to a target object, and each eight monaural sound source locates at a position with unique 3D coordinates. A second position of a target object in the VR scenario is obtained, where the second position has 3D coordinates, and the eight first positions and the second position are based on the same coordinate origin. A distance between each of the eight first positions and the second position is determined to obtain eight distances. The eight pieces of monaural data are adjusted according to the eight distances. The eight pieces of monaural data adjusted are synthesized to 7.1-channel data.

Abstract: A host device communicating with a plurality of accessory devices transmits audio data packets via a broadcast channel to the plurality of accessory devices. When one of the plurality of accessory devices determines an audio data packet has not been received, the accessory device sends a negative-acknowledgement signal (NACK) via a unicast channel. The NACK indicates that the at least one of the accessory devices did not receive at least one audio data packet. The host device retransmits the at least one audio data packet indicated as not being received via the broadcast channel to the plurality of accessory devices. Other aspects are also described and claimed.

Abstract: A vehicle includes a passenger capsule, a seat, and a sound suppression system. The passenger capsule includes a headliner. The seat is positioned within the passenger capsule. The seat includes a headrest. The sound suppression system includes one or more speakers and a controller. The one or more speakers are at least one of (i) positioned within the headrest or (ii) positioned within the headliner. The controller is configured to control the one or more speakers to emit sound waves having at least one of a target frequency or a target amplitude to generate a noise suppression zone that projects outward from at least one of the headrest or the headliner toward a passenger sitting in the seat to suppress one or more low frequency sound waves perceived by the passenger.

Abstract: Disclosed herein are systems, methods, apparatus, and non-transitory computer-readable storage media for detecting gunshots with improved accuracy. The system includes a plurality of acoustic sensing devices having intelligent modules for distinguishing gunshot events from other types of acoustic events.

Abstract: A method of suppressing residual echo includes calculating a spectral mismatch of an acoustic echo canceler based upon a program content signal and a residual signal; determining a set of filter coefficients based at least in part upon a selected spectral mismatch; filtering the residual signal based upon the set of filter coefficients; freezing the calculation of the selected spectral mismatch in response to detecting a double talk condition in the residual signal; waiting a predetermined hold period in response to detecting that the double talk condition has ended; and, after the predetermined hold period, resuming the calculation of the spectral mismatch based upon the program content signal and the residual signal.

Abstract: In one aspect a method that includes receiving an input signal captured by one or more first sensors associated with an active noise reduction (ANR) device, and processing the input signal using a first filter disposed in an ANR signal path to generate a first signal for an acoustic transducer of the ANR device. The input signal is processed in a pass-through signal path disposed in parallel with the ANR signal path to generate a second signal for the acoustic transducer, wherein the pass-through signal path allows a portion of the input signal to pass through to the acoustic transducer in accordance with a variable gain. One or more second sensors detect an existence of a condition likely to cause instability in the pass-through signal path, and in response, the variable gain is adjusted. A driver signal for the acoustic transducer is generated using an output based on the adjusted gain.

Abstract: Methods, systems, computer-readable media, and apparatuses for signal enhancement are presented. One example of such an apparatus includes a receiver configured to produce a remote speech signal from information carried by a wireless signal; a signal canceller configured to perform a signal cancellation operation on a local speech signal to generate a room response; and a filter configured to filter the remote speech signal according to the room response to produce a filtered speech signal. In this example, the signal cancellation operation is based on the remote speech signal as a reference signal.

Abstract: Audio processing systems and methods comprise an audio sensor array configured to receive a multichannel audio input and generate a corresponding multichannel audio signal and a target activity detector configured to identify audio target sources in the multichannel audio signal. The target activity detector includes a VAD, an instantaneous locations component configured to detect a location of a plurality of audio sources, a dominant locations component configured to selectively buffer a subset of the plurality of audio sources comprising dominant audio sources, a source tracker configured to track locations of the dominant audio sources over time, and a dominance selection component configured to select the dominant target sources for further audio processing. The instantaneous location component computes a discrete spatial map comprising the location of the plurality of audio sources, and the dominant location component selects N of the dominant sources from the discrete spatial map for source tracking.

Abstract: A motion-sensitive acoustic speaker may include a housing; a transmitter associated with the housing, a receiver associated with the housing, a interface component associated with the housing, and a processing device.

Abstract: A mobile computing device stand with a holder for a mobile computing device with a media player for conducting an audio session and back speakers positioned in the seat behind a location where a user is expected to be positioned and next to the seat. The back speakers include a first set positioned at a first side of the seat and a second set positioned at a second side of the seat opposite the first side of the seat. The first and second sets includes first and second inward back speakers facing toward the location and first and second outward back speakers facing away from the location. A system controller receives audio signals with audio of an audio session, sends the audio signals to the first and second inward back speakers, and sends the audio signals in an out of phase manner to the first and second outward back speakers.

Abstract: Disclosed herein is a method of constructing and utilizing a sound engineering evaluation and comparison process to allow for improved finished results. Such a method entails the utilization of a high-pass filter for listening evaluation of recorded music or sounds including consistency with low-frequency mixing to allow for a tool to implement changes in relation to the filtered results in order to accommodate sensitivities of the human ear (with the optional inclusion of a comparison method to provide possible further enhanced results and the avoidance of biases). In such a manner, a facilitating method for sound engineering mixing adjustments that provide such accommodations are provided for improved sound recordings for distribution within on-line or recording product frameworks.

Abstract: An electronic device may be configurable to operate in a scrambling mode and a non-scrambling mode while processing chat audio and microphone audio for a first player participating in an online multiplayer game. While operating in the non-scrambling mode, the electronic device may be configured to transmit the microphone audio without scrambling the microphone audio. While operating in the scrambling mode, the electronic device may be configured to scramble the microphone audio and transmit the scrambled microphone audio. The electronic device may be operable to select a scrambling key used to scramble the microphone audio based on a signal received by the electronic device that indicates a role of the player in the online multiplayer game. The role of the player may correspond to which of two or more opposing teams the first player is a member of in the online multiplayer game.

Abstract: A sound reproducing apparatus capable of self-diagnostic. The apparatus includes a directional speaker emitting ultrasound waves to a target object, an information acquisition unit configured to acquire a sound from the target object and optionally an image of the target object, and a processor electrically connected with the directional speaker and the information acquisition unit. The processor drives the directional speaker to emit the ultrasound waves to the target object and diagnoses a failure of the directional speaker based on the sound acquired by the information acquisition unit. A self-diagnostic method for a sound reproducing apparatus having a directional speaker is also provided.

Abstract: A sound receiving structure is applied to a sound receiving electronic device to receive a sound, wherein the sound receiving electronic device includes a housing defines a housing hole. The sound receiving structure includes a circuit board and an accommodating structure. The circuit board includes a plate, a sound guiding tube and a microphone. The plate defines a circuit board hole. The sound guiding tube is provided above the plate and located in the housing hole and includes a sound guiding hole aligned with the circuit board hole, wherein a diameter of the circuit board hole is smaller than a diameter of the sound guiding hole. The microphone is provided below the plate and corresponds in position to the circuit board hole. A sound passes through the sound guiding hole and the circuit board hole and then enters the microphone.

Abstract: Embodiments of wireless audio systems and methods for wirelessly communicating audio information are disclosed herein. In one example, a wireless audio system includes a first and a second wireless headphones. The first wireless headphone is configured to receive, from an audio source, audio information using a short-range wireless communication, and in response to successfully receiving the audio information from the audio source, transmit a first error correcting message including an error correcting code generated based on the audio information to a second wireless headphone. The second wireless headphone is configured to receive the audio information from the audio source using the short-range wireless communication, attempt to correct the received audio information based on the first error correcting message, and determine that the received audio information fails to be corrected.

Abstract: Canceling acoustic echoes includes picking up with a microphone sound generated by a sound source and transferred from the sound source to the microphone via an unknown transfer path having an unknown transfer function, and providing an electrical microphone signal therefrom. It further includes approximating the unknown transfer function with an estimated transfer function of an adaptive filter and filtering an electrical signal representative of the sound generated by the sound source with the estimated transfer function to provide an estimated signal therefrom, the adaptive filter having an adaptive adaptation step size. It further includes filtering a difference signal, which is the difference between the microphone signal and the estimated signal, with a post filter transfer function of an adaptive post filter.