A recording device records a video and an imaging time, and a voice. Based on the voice, a sound parameter calculator calculates a sound parameter for specifying magnitude of the voice in a monitoring area at the imaging time for each of pixels and for each of certain times. A sound parameter storage unit stores the sound parameter. A sound parameter display controller superimposes a voice heat map on a captured image of the monitoring area and displays the superimposed image on a monitor. At this time, the sound parameter display controller displays the voice heat map based on a cumulative time value of magnitude of the voice, according to designation of a time range.

Methods for a voice processing system comprising P microphone units (102A . . . 102D) and a central unit (104) are disclosed. Each microphone unit is linked to a person and derives from N microphone signals a source localisation signal. The source localisation signal is used to control an adaptive beam form process to obtain a beam formed audio signal. The microphone unit is further configured to derive metadata from for N microphone signals, such direction the sound is coming from. Packages with the metadata and beam formed audio signal are transmitted to the central unit. The central unit processes the metadata to determine which parts of the P beam formed audio signal comprises speech from a person that is linked to another microphone unit. By removing said parts from the audio signals before transcription, the quality of the transcription is improved. The transcriptions are displayed on a remote device.

It is disclosed a voice pickup method and apparatus for an intelligent rearview mirror, an electronic device and a computer readable storage medium which relates to the technical field of vehicle-mounted equipment, and may be used in the field of automatic driving technologies. A voice pickup implementation of the intelligent rearview mirror according to some embodiments includes: acquiring an image of the interior of the vehicle; determining the position of a person in the vehicle with the image of the interior of the vehicle; and adjusting a beamforming direction of a microphone array according to the position of the person in the vehicle.

Methods, apparatus, systems, and articles of manufacture are disclosed. An example apparatus includes instructions that, when executed, cause processor circuitry to at least: obtain audio data channels produced by physical capture devices; calculate: a first plurality of angles corresponding to ones of the physical capture devices, the first plurality of angles to describe how sound produced by an audio source arrives to the physical capture devices, a location of the audio source based on the first plurality of angles, a location of virtual capture arrays, and a second plurality of angles to describe how sound produced by the audio source would arrive to the virtual capture arrays; interpolate between two angles from either of the first plurality or the second plurality of angles; and render a binaural audio signal based on the audio data channels and the interpolated angle.

A head-worn audio device is provided with a circuit for voice signal enhancement. The circuit comprises at least a plurality of microphones, arranged at predefined positions, where each microphone provides a microphone signal. The circuit further comprises a directivity pre-processor and a blind source separation processor. The directivity pre-processor is connected with the plurality of microphones to receive the microphone signals and being configured to provide at least a voice signal and a noise signal. Directivity pre-processing increases the mutual independence of the signals provided to the blind source separation processor and thus improves processing by blind source separation. The blind source separation processor receives at least the voice signal and the noise signal, and is configured to conduct blind source separation on at least the voice signal and the noise signal to provide at least an enhanced voice signal with reduced noise components.

An image capture device with beamforming for wind noise optimized microphone placements is described. The image capture device includes a front facing microphone configured to capture an audio signal. The front facing microphone co-located with at least one optical component. The image capture device further includes at least one non-front facing microphone configured to capture an audio signal. The image capture device further includes a processor configured to generate a forward facing beam using the audio signal captured by the front facing microphone and the audio signal captured by the at least one non-front facing microphone, generate an omni beam using the audio signal captured by the at least one non-front facing microphone, and output an audio signal based on the forward facing beam and the omni beam.

A hearing aid system assists a user's ability to hear. The system has a hearing aid instrument worn on the user's head. A sound signal from the user's surroundings is recorded and converted into input audio signals by two input transducers. The input audio signals are processed in a signal processing step for generating an output audio signal, which is output by an output transducer. The input audio signals or audio signals derived therefrom by pre-processing are direction-dependently damped by an adaptive beamformer according to the stipulation of a variable directivity with a directional strength to generate a directed audio signal. The directivity is varied with a specified adaptation speed such that the energy content of the directed audio signal is minimized. The adaptation speed and/or the directional strength are variably set on a basis of an analysis of the input audio signals or of the pre-processed audio signals.

Aspects of a multi-orientation playback device including at least one microphone array are discussed. A method may include determining an orientation of the playback device which includes at least one microphone array and determining at least one microphone training response for the playback device from a plurality of microphone training responses based on the orientation of the playback device. The at least one microphone array can detect a sound input, and the location information of a source of the sound input can be determined based on the at least one microphone training response and the detected sound input. Based on the location information of the source, the directional focus of the at least one microphone array can be adjusted, and the sound input can be captured based on the adjusted directional focus.

The speaker array includes a first speaker 1, a second speaker 2, and a local sound emission structure 3. The first transmission portion 311 and the second transmission portion 312 are arranged in such a manner that the distance between the center position of the first transmission portion 311 and the center position of the second transmission portion 312 is smaller than the distance between the center position of the first speaker 1 and the center position of the second speaker 2, in order to generate sound sources that are arranged at an interval narrower than the interval between the first speaker 1 and the second speaker 2.

Method of detecting and tracking an unmanned aerial vehicle, the method comprising, at a detector unit (300a) comprising a first microphone and a second microphone: monitoring for a sound associated with the presence of the unmanned aerial vehicle (505) in the vicinity of the detector unit; in response to the monitoring indicating the presence of the unmanned aerial vehicle, determining, at the detector unit, a phase delay between the sound as received at the first microphone and the sound as received at the second microphone; on the basis of the determined phase delay and a known separation of the first microphone and the second microphone, determining, at the detector unit, an azimuth angle (507a) to the unmanned aerial vehicle from the detector unit; and transmitting, to a computing node (501), the determined azimuth angle for use in determining a location of the unmanned aerial vehicle.