System for selecting a loudspeaker based on its low frequency rendering

Patent metadata

Field	Value
Publication number	US-2018249249-A1
Application number	US-201715442327-A
Country	US
Kind code	A1
Filing date	Feb 24, 2017
Priority date	Feb 24, 2017
Publication date	Aug 30, 2018
Grant date	—

Abstract

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.

First claim

1 . A system for selecting a loudspeaker based on its low frequency rendering, comprising:
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 for playing the plurality of filtered signals, each loudspeaker playing the signal filtered by one of the plurality of filters; and 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, the low frequency response for one of the plurality of loudspeakers representing a maximum amplitude of a given signal played by the one of the plurality of loudspeakers for frequencies included in a low frequency range wherein the selection consists in selecting the loudspeaker among the plurality of loudspeakers providing the best low frequency response for a range of low frequencies of the reference amplitude spectrum of the model signal and wherein a simulated average amplitude for the range of low frequencies is calculated for each loudspeaker based on the reference amplitude spectrum of the model signal for the range of low frequencies and the low frequency response of each loudspeaker, and the selected loudspeaker provides the highest simulated average amplitude for the range of low frequencies.

2 . (canceled)

3 . (canceled)

4 . The system of claim 1 , wherein the model signal is generated by the synthesizer among the plurality of synthesizers associated with the selected loudspeaker.

5 . The system of claim 4 , wherein the model signal generated by the synthesizer among the plurality of synthesizers associated with the selected loudspeaker is filtered by the filter among the plurality of filters associated with the selected loudspeaker.

6 . The system of claim 5 , wherein the model signal filtered by the specific filter is played by the selected loudspeaker.

7 . The system of claim 4 , further comprising a channel configurator for configuring the specific synthesizer to generate the model signal according to a calibrated amplitude spectrum of the model signal, the calibrated amplitude spectrum being determined based on a reference amplitude spectrum of the model signal and at least one of the following: a target global signal amplitude, a directionality of the model signal when played by the selected loudspeaker and a frequency response of the specific synthesizer.

8 . The system of claim 1 , wherein the signals generated by the plurality of synthesizers consist 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.

9 . The system of claim 1 , further comprising a physical simulation environment, the plurality of loudspeakers being positioned on a wall of the physical simulation environment for transmitting the plurality of played signals to a user of the physical simulation environment positioned inside the physical simulation environment.

10 . The system of claim 9 , 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
• Giguere Marc-Andre

Classifications

• H04R2430/03

  Synergistic effects of band splitting and sub-band processing · CPC title

• H04S3/002

  Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution (control circuits for electronic adaptation of the sound field H04S7/30) · CPC title

• H04R29/001

  for loudspeakers (H04R29/007 takes precedence) · CPC title

• H04R3/14 Primary

  Cross-over networks · CPC title

• G09B9/22 Primary

  including aircraft sound simulation · CPC title