System for dynamically adapting calibrated multi-channel non-coherent signals

Patent metadata

Field	Value
Publication number	US-9860664-B1
Application number	US-201715442301-A
Country	US
Kind code	B1
Filing date	Feb 24, 2017
Priority date	Feb 24, 2017
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

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.

First claim

What is claimed is:

1. A system for dynamically adapting calibrated multi-channel non-coherent signals, comprising:
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, each filter filtering the signal generated by one of the plurality of synthesizers, each filter being configured for performing the band-pass filtering in a dedicated frequency band;
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, each loudspeaker playing the signal filtered by one of the plurality of filters;
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; and
the channel configurator for configuring each filter to generate the corresponding signal according to a calibrated amplitude spectrum of the signal, the calibrated amplitude spectrum being determined by the synthesizer based on a reference amplitude spectrum of the signal and an adjusted global signal amplitude, the adjusted global signal amplitude being calculated based on a target global signal amplitude and the physical simulation environment signal amplitude.

2. The system of claim 1 , wherein the calculated adjusted global signal amplitude is stored by the channel configurator, and the currently calculated adjusted global signal amplitude is equal to the sum of the previously stored adjusted global signal amplitude and the difference between the target global signal amplitude and the physical simulation environment signal amplitude.

3. The system of claim 1 , wherein the determination of the calibrated amplitude spectrum of the signal based on the reference amplitude spectrum of the signal and the adjusted global signal amplitude comprises determining a calibrated average amplitude of the calibrated amplitude spectrum based on a reference average amplitude of the reference amplitude spectrum and the adjusted global signal amplitude, the sum of the calibrated average amplitude of the plurality of signals being substantially equal to the adjusted global signal amplitude.

4. The system of claim 1 , wherein the determination of the calibrated amplitude spectrum of the signal generated by the synthesizer is further based on at least one of the following: a directionality of the signal when played by the loudspeaker and a frequency response of the synthesizer.

5. The system of claim 1 , wherein each generated signal consists of one of the following: a noise signal, a combination of noise signals, a tone signal, a combination of tone signals, and a combination of at least one noise signal and at least one tone signal.

6. The system of claim 1 , wherein the plurality of loudspeakers transmits the plurality of played signals to a user of the simulator positioned inside the physical simulation environment, and the noise sensor is positioned in the vicinity of the user.

7. The system of claim 1 , wherein the simulator consists of an aircraft simulator and at least one of the plurality of generated signals consists of one of the following: a sound signal corresponding to aerodynamic hiss, a sound signal corresponding to engine noise, a sound signal corresponding to flaps being raised or lowered, a sound signal corresponding to landing gear being deployed or retracted, and a sound signal corresponding to a hydraulic pump being activated.

Assignees

• Cae Inc

Inventors

• Ayotte Maxime

Classifications

• G09B9/22 Primary

  including aircraft sound simulation · CPC title

• H04S2400/13

  Aspects of volume control, not necessarily automatic, in stereophonic sound systems · CPC title

• H04S3/008

  in which the audio signals are in digital form, i.e. employing more than two discrete digital channels (data reduction aspects thereof based on psychoacoustics G10L19/02) · CPC title

• H04R5/02

  Spatial or constructional arrangements of loudspeakers · CPC title

• H04S7/301 Primary

  Automatic calibration of stereophonic sound system, e.g. with test microphone · CPC title