Abstract:
An area-sound reproduction system includes a speaker array in which a plurality of speakers are linearly arranged side by side, a sound collector that collects an environment sound in an environment where the area-sound reproduction system is installed, and a processor that adjusts reproduced sounds that the plurality of speakers are caused to output, based on a control line, and causes the area-sound reproduction system to output the reproduced sounds, the control line being set at a position substantially in parallel with the speaker array and apart from the speaker array by a predetermined distance, and including a reproduction line in which sound waves emitted from the speaker array constructively interfere with each other and a non-reproduction line in which the sound waves destructively interfere with each other, in which the processor measures a noise level from the collected environment sound, and adjusts the reproduced sounds, at each frequency, such that a sound pressure of the reproduced sound reaching the reproduction line on the control line exceeds the noise level, and a sound pressure of the reproduced sound reaching the non-reproduction line on the control line does not exceed the noise level.
Abstract:
A conversation assistance system with a bi-lateral array of microphones arranged externally of a space that does not include any array microphones, where the space has a left side, a right side, a front and a back, the array comprising a left side sub-array of multiple microphones and a right side sub-array of multiple microphones, where each microphone has a microphone output signal, and a processor that creates from the microphone output signals a left-ear audio signal and a right-ear audio signal. The left-ear audio signal is created based on the microphone output signals from one or more of the microphones of the left-side sub-array and one or more of the microphones of the right-side sub-array and the right-ear audio signal is created based on the microphone output signals from one or more of the microphones of the left-side sub-array and one or more of the microphones of the right-side sub-array.
Abstract:
Speaker systems are provided, particularly for mounting in off-road vehicles, ATVs, UTVs, watercraft and motorcycles. The speaker systems may include a linear array of speakers and a housing encasing a backside thereof. In some cases, the speaker systems include a pipe-mounting clamp coupled to the housing for mounting the speaker system to a surface. In addition or alternatively, the speaker systems may include L-shaped mounting brackets arranged along opposing lateral sides of the housing for mounting the speaker system to a surface. In some cases, the housing includes a substantially uniform depth spanning opposing lateral sides of the linear array of speakers. In some embodiments, a speaker system may be suspended in proximity to an upper bar of a windshield frame, front roll bar, and/or front edge of a roof of a vehicle.
Abstract:
A multi-beam sound system includes a fixed beamforming section which steers the input signal inputted from the microphone array to an intended direction, a blocking matrix which receives the input signal and acquires a noise reference signal from the input signal, a variable beamforming section which acquires an adaptive noise signal from the noise reference signal outputted from the blocking matrix, and a generalized sidelobe canceller (GSC) which includes canceling means for outputting an object signal from the input signal outputted from the fixed beamforming section by removing the adaptive noise signal from the input signal. The fixed beamforming section steers the input signal in at least two directions.
Abstract:
A loudspeaker includes a plurality of electro-acoustic drivers that are configured to be positioned so that an axis running through an acoustic center of the drivers is one of a substantially straight line, J-shape, reverse J-shape, and C-shape. The loudspeaker also includes at least one sensor to detect a configuration of the plurality of electro-acoustic drivers, and a processing device configured to automatically adjust one or more of an equalization and a gain applied to an audio signal output through the electro-acoustic drivers based on the detected configuration.
Abstract:
This disclosure describes a method to manufacture a conferencing apparatus for echo cancelation with beamforming microphone arrays. This method provides a beamforming microphone array for developing a plurality of microphone signals, where each microphone of the beamforming microphone array is configured to sense acoustic waves from a direction vector substantially different from other microphones in the beamforming microphone array. Additionally provided is a memory configured for storing computing instructions. Operably coupled is a processor that executes computing instructions to: perform a beamforming operation to combine the plurality of microphone signals to a plurality of combined signals that includes a number of signals between one and a number of signals in the plurality of microphone signals, each of the plurality of combined signals corresponding to a different fixed beam; and perform an acoustic echo cancelation operation on the plurality of combined signals to generate a plurality of combined echo-canceled signals.
Abstract:
A method of estimating a steering vector of a sensor array of M sensors according to one embodiment of the present disclosure includes estimating a steering vector of a noise source located at an angle 0 degrees from a look direction of the array using a least squares estimate of the gains of the sensors in the array, defining a steering vector of a desired sound source in the look direction of the array, and estimating the steering vector by performing element-by-element multiplication of the estimated noise vector and the complex conjugate of steering vector of the desired sound source. The sensors may be microphones.
Abstract:
A speaker, a television provided with the speaker and a multimedia device are provided. The speaker includes a box body and a plurality of transducer units installed within the box body by means of parallel connection: front sound cavities of the plurality of transducer units are independent of each other, respectively; and the plurality of transducer units share one back sound cavity. The speaker possesses such advantages that it has a high sound pressure level output and a smaller power consumption, it is usable to reduce the back-cavity acoustic resistance, and it is usable to raise the lower frequency limit in the low frequency range.
Abstract:
Methods and apparatus are provided for filtering sound in a vehicle. The methods includes generating a microphone signal corresponding to sounds in the passenger compartment. The methods also include receiving an audio-based service being utilized by at least one occupant. A sound separation mode is selected from the plurality of sound separation modes. Each sound separation mode corresponds to a different audio filtering scheme. The method also includes filtering the input received by the microphone in accordance with the selected sound separation mode to generate at least one filtered signal.
Abstract:
An audio system and method using indoor response estimation are disclosed. An acoustic feature prediction method of the audio system may include generating a detection signal based on an input signal and a modulation code; generating an acoustic signal based on the detection signal and outputting the acoustic signal to a plurality of speakers; measuring acoustic signals output from the speakers where the speakers are installed; and predicting acoustic features related to the speakers based on the measured acoustic signals and the modulation code.