Cae Inc.

Maxime Ayotte

Laurent Desmet

Marc-Andre Giguere

A method for generating sound within a predetermined environment, the method comprising: emitting a first audio signal from a first location; and concurrently emitting a second audio signal from a second location, wherein: the first location and second location are distinct within the environment; the first audio signal and second audio signal have the same frequency; and the first audio signal and second audio signal have a phase difference that varies as a function of time to limit the time-averaged interference fluctuation across the environment.

Method and system for limiting spatial interference fluctuations between audio signals

A method for determining an actual position of a microphone, comprising: sequentially emitting a first sound signal via a first speaker positioned and a second sound signal via a second speaker positioned; measuring a first elapsed time between the emission of the first sound signal and a detection of the first sound signal by the microphone, and a second elapsed time between the emission of the second sound signal and a detection of the second sound signal by the microphone; determining a first distance between the first speaker and the microphone using the first elapsed time, and a second distance between the second speaker and the microphone using the second elapsed time; determining the actual position of the microphone using the first and second distances and the positions of the first and second speaker; and outputting the actual position.

Method and system for determining a position of a microphone

A method comprising: receiving a reference time delay between a first reference signal emitted by a first speaker and a second reference signal emitted by a second speaker, each recorded by a microphone having a target position; using the microphone positioned at an actual position, recording a first sound signal emitted by the first speaker and a second sound signal emitted by the second speaker; determining an actual time delay between the first and second sound signals; comparing the actual time delay to the reference time delay; determining a match or a mismatch between the actual position and the target position for the given microphone; and outputting an indication of the match/mismatch.

Method and system for validating a position of a microphone

A system for generating calibrated multi-channel non-coherent signals. The system comprises a plurality of synthesizers for generating a corresponding plurality of signals, and a plurality of filters for band-pass filtering the plurality of generated signals. Each filter filters the signal generated by one of the plurality of synthesizers, by performing the band-pass filtering in a dedicated frequency band. The system comprises a plurality of loudspeakers for playing the plurality of filtered signals respectively filtered by the plurality of filters. The system comprises a channel configurator for configuring at least one of the filters for performing the band-pass filtering according to a calibrated amplitude spectrum of the signal. The calibrated amplitude spectrum is determined based on a reference amplitude spectrum of the signal and at least one of the following parameters: a target global signal amplitude, a directionality of the signal when played by the corresponding loudspeaker, and a frequency response of the synthesizer.

System for generating calibrated multi-channel non-coherent signals

There is described a computer-implemented method for calibrating a sound signal, comprising: receiving an initial sound signal, a recorded background sound signal, a recorded initial sound signal and a target sound signal; subtracting the recorded background sound signal from the recorded initial sound signal, thereby obtaining a denoised sound signal; dividing the target sound signal by the denoised sound signal, thereby obtaining a compensation factor; dividing the initial sound signal by the compensation factor, thereby obtaining a calibrated sound signal; and outputting the calibrated sound signal.

Method and system for calibrating a sound signal in a playback audio system

A system for selecting a loudspeaker based on its low frequency rendering. The system comprises a plurality of synthesizers for generating a corresponding plurality of signals. The system comprises a plurality of filters for band-pass filtering the plurality of generated signals. Each filter filters the signal generated by one of the plurality of synthesizers. Each filter is configured for performing the band-pass filtering in a dedicated frequency band. The system comprises a plurality of loudspeakers for playing the plurality of filtered signals. Each loudspeaker plays the signal filtered by one of the plurality of filters. The system comprises a channel configurator for selecting one among the plurality of loudspeakers based on a reference amplitude spectrum of a model signal and a low frequency response of each one of the plurality of loudspeakers.

System for selecting a loudspeaker based on its low frequency rendering

A system for dynamically adapting calibrated multi-channel non-coherent signals. The system comprises a physical simulation environment, a plurality of synthesizers for generating a corresponding plurality of signals, a plurality of filters for band-pass filtering the plurality of generated signals, and a plurality of loudspeakers positioned on a wall of the physical simulation environment for playing the plurality of filtered signals inside the physical simulation environment. The system comprises a noise sensor positioned inside the physical simulation environment for measuring a physical simulation environment signal amplitude and transmitting the physical simulation environment signal amplitude to a channel configurator. The system comprises the channel configurator for configuring each synthesizer to generate the corresponding signal according to a calibrated amplitude spectrum of the signal. The calibrated amplitude spectrum is determined based on a reference amplitude spectrum of the signal and an adjusted global signal amplitude. The adjusted global signal amplitude is calculated based on a target global signal amplitude and the physical simulation environment signal amplitude.

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Saint-Laurent, Canada

Maxime Ayotte