A method for calibrating an acoustic antenna (10), the acoustic antenna comprising a plurality of acoustic transducers (11.sub.k), each acoustic transducer being able to generate an electrical signal (s.sub.k) under the effect of a detection of an acoustic wave, the antenna comprising elementary transducers (11.sub.k) that are distributed over an antenna row or an antenna plane, about a reference transducer (11.sub.0), the antenna defining a main axis (Y.sub.0), passing through the reference transducer, and perpendicular to the antenna row or antenna plane, the method comprising the following steps: a) placing a calibration source (5) in at least one position (r.sub.0, r.sub.j) with respect to the antenna, the calibration source being able to transmit a calibration acoustic wave (6); b) measuring signals (s.sub.k) generated by all or some of the elementary transducers in response to the calibration acoustic wave; c) on the basis of the measurements performed in step b), determining a temporal phase shift (p.sup.0.sub.k,n, p.sub.k,j) of the signal respectively generated by each elementary transducer; d) reiterating a) to c) in such a way that, in at least one iteration, the position of the calibration source may be considered to be centered on the main axis; the method comprising estimating a phase shift (.sub.k) of each elementary transducer with respect to the reference transducer.

In accordance with an embodiment a package includes: a package structure which defines inner surfaces delimiting an inner volume and outer surfaces directed towards an exterior of the package; at least one acoustic sensor element applied to at least one of the inner surfaces, to convert acoustic waves arriving from the exterior of the package into acoustic information in the form of electric signals; a plurality of millimeter wave sensing elements applied to at least one of the outer surfaces, to receive reflected radar signals from objects in the exterior of the package; and a circuitry applied to at least one of the inner surfaces of the package structure, wherein the circuitry is electrically connected to the at least one acoustic sensor element and the plurality of millimeter wave sensing elements to process the acoustic information and the reflected radar signals.

Provided are a device control method and apparatus. The method is applied to an audio device, and includes: receiving an acoustic signal set, determining a propagation characteristic of an acoustic signal in the acoustic signal set, determining, according to the propagation characteristic, a device parameter associated with audio play quality to be used by the audio device, and controlling the audio device to play audio with the device parameter.

Provided are a device control method and apparatus. The method is applied to an audio device, and includes: receiving an acoustic signal set, determining a propagation characteristic of an acoustic signal in the acoustic signal set, determining, according to the propagation characteristic, a device parameter associated with audio play quality to be used by the audio device, and controlling the audio device to play audio with the device parameter.

A compensation filter is operable to receive a received signal in response to a transmitted signal, the received signal having a time duration. The compensation filter is operable to generate a compensated signal. The compensation filter changes shape of an associated transfer function during the time duration of the received signal to result in the compensated signal having an improved spectral flatness throughout the time duration of the received signal. The compensation filter can be used in a sonar system. A method, which can be used in a sonar system, uses the compensation filter.

A compensation filter is operable to receive a received signal in response to a transmitted signal, the received signal having a time duration. The compensation filter is operable to generate a compensated signal. The compensation filter changes shape of an associated transfer function during the time duration of the received signal to result in the compensated signal having an improved spectral flatness throughout the time duration of the received signal. The compensation filter can be used in a sonar system. A method, which can be used in a sonar system, uses the compensation filter.

An array of microphones placed on a mobile robot provides multiple channels of audio signals. A received set of audio signals is called an audio segment, which is divided into multiple frames. A phase analysis is performed on a frame of the signals from each pair of microphones. If both microphones are in an active state during the frame, a candidate angle is generated for each such pair of microphones. The result is a list of candidate angles for the frame. This list is processed to select a final candidate angle for the frame. The list of candidate angles is tracked over time to assist in the process of selecting the final candidate angle for an audio segment.

An array of microphones placed on a mobile robot provides multiple channels of audio signals. A received set of audio signals is called an audio segment, which is divided into multiple frames. A phase analysis is performed on a frame of the signals from each pair of microphones. If both microphones are in an active state during the frame, a candidate angle is generated for each such pair of microphones. The result is a list of candidate angles for the frame. This list is processed to select a final candidate angle for the frame. The list of candidate angles is tracked over time to assist in the process of selecting the final candidate angle for an audio segment.

An array of microphones placed on a mobile robot provides multiple channels of audio signals. A received set of audio signals is called an audio segment, which is divided into multiple frames. A phase analysis is performed on a frame of the signals from each pair of microphones. If both microphones are in an active state during the frame, a candidate angle is generated for each such pair of microphones. The result is a list of candidate angles for the frame. This list is processed to select a final candidate angle for the frame. The list of candidate angles is tracked over time to assist in the process of selecting the final candidate angle for an audio segment.

An array of microphones placed on a mobile robot provides multiple channels of audio signals. A received set of audio signals is called an audio segment, which is divided into multiple frames. A phase analysis is performed on a frame of the signals from each pair of microphones. If both microphones are in an active state during the frame, a candidate angle is generated for each such pair of microphones. The result is a list of candidate angles for the frame. This list is processed to select a final candidate angle for the frame. The list of candidate angles is tracked over time to assist in the process of selecting the final candidate angle for an audio segment.