Eduardo Escoto Salvador

US Patent:

8204242, Jun 19, 2012

Filed:

Feb 29, 2008

Appl. No.:

12/040098

Inventors:

Davis Y. Pan - Arlington MA, US
Christopher J. Cheng - Arlington MA, US
Eduardo T. Salvador - Cambridge MA, US

Assignee:

Bose Corporation - Framingham MA

International Classification:

G10K 11/16
H04B 15/02
G10K 11/00
H04B 15/00

US Classification:

381 7111, 381 714, 381 941, 381 949

Abstract:

An active noise reduction system using adaptive filters. A method of operation the active noise reduction system includes smoothing a stream of leakage factors. The frequency of a noise reduction signal may be related to the engine speed of an engine associated with the system within which the active noise reduction system is operated. The engine speed signal may be a high latency signal and may be obtained by the active noise reduction system over audio entertainment circuitry.

US Patent:

8355512, Jan 15, 2013

Filed:

Oct 20, 2008

Appl. No.:

12/254037

Inventors:

Davis Y. Pan - Arlington MA, US
Eduardo T. Salvador - Cambridge MA, US

Assignee:

Bose Corporation - Framingham MA

International Classification:

A61F 11/06

US Classification:

381 7111

Abstract:

A method for determining leakage factors or adaptation rates, or both, for adaptive filters in an active noise reduction system. The leakage factor or adaptation rate, or both, may vary depending on a parameter of an input reference signal. The parameter may include one or more of reference signal input frequency, rate of change of reference input signal frequency, if a predetermined triggering condition exits, or if a predetermined event has occurred.

US Patent:

20050185806, Aug 25, 2005

Filed:

Mar 4, 2005

Appl. No.:

11/071935

Inventors:

Eduardo Salvador - Cambridge MA, US
Tobe Barksdale - Bolton MA, US

International Classification:

H04B001/00
H04R005/00

US Classification:

381119000, 381307000

Abstract:

Preserving an audio signal in an audio system includes selecting a first audio signal from a plurality of audio signals. The first audio signal is applied to a first transducer. Mix a portion of the first audio signal with a second audio signal from the plurality of audio signals to provide a mixed audio signal. A gain of the first audio signal that is applied to the first transducer is decreased while a portion of the mixed audio signal is applied to a second transducer to preserve at least a portion of the first audio signal.

US Patent:

20080095383, Apr 24, 2008

Filed:

Jun 26, 2006

Appl. No.:

11/426537

Inventors:

Davis Pan - Arlington MA, US
Christopher J. Cheng - Arlington MA, US
Eduardo Salvador - Cambridge MA, US

International Classification:

A61F 11/06
G10K 11/16
H03B 29/00

US Classification:

381 7111

Abstract:

An active noise reduction system using adaptive filters. A method of operation the active noise reduction system includes smoothing a stream of leakage factors. The frequency of a noise reduction signal may be related to the engine speed of an engine associated with the system within which the active noise reduction system is operated. The engine speed signal may be a high latency signal and may be obtained by the active noise reduction system over audio entertainment circuitry.

US Patent:

20120201397, Aug 9, 2012

Filed:

Apr 13, 2012

Appl. No.:

13/446911

Inventors:

Davis Pan - Arlington MA, US
Christopher J. Cheng - Arlington MA, US
Eduardo Salvador - Cambridge MA, US

International Classification:

G10K 11/16

US Classification:

381 714

Abstract:

An active noise reduction system using adaptive filters. A method of operation the active noise reduction system includes smoothing a stream of leakage factors. The frequency of a noise reduction signal may be related to the engine speed of an engine associated with the system within which the active noise reduction system is operated. The engine speed signal may be a high latency signal and may be obtained by the active noise reduction system over audio entertainment circuitry.

US Patent:

20200252724, Aug 6, 2020

Filed:

Jan 6, 2020

Appl. No.:

16/734829

Inventors:

- Framingham MA, US
Michael S. Dublin - Cambridge MA, US
Eduardo T. Salvador - Cambridge MA, US
Charles Oswald - Salem NY, US

International Classification:

H04R 3/12
H03G 5/16
H03G 3/02
H03G 3/30
H04S 7/00
H04R 5/02

Abstract:

The technology described in this document can be embodied in a method that includes receiving information indicative of a volume setting corresponding to each listening zone of a plurality of listening zones. The method also includes generating a zone-specific adjustment signal for each of the plurality of listening zones, wherein the zone-specific adjustment signal for a given listening zone accounts for a cross-zone effect associated with a volume setting corresponding to another listening zone, and is configured to adjust an output of corresponding zone-specific circuitry. The method further includes generating an additional adjustment signal configured to adjust an output of a cross-zone equalization filter. The output of the cross-zone equalization filter is configured to generate a target acoustic distribution across multiple listening zones. The method also includes generating an output of an acoustic transducer of the multi-zone audio system based on the zone-specific adjustment signals and the additional adjustment signal.

US Patent:

20190104363, Apr 4, 2019

Filed:

Sep 29, 2017

Appl. No.:

15/720622

Inventors:

- Framingham MA, US
Michael S. Dublin - Cambridge MA, US
Eduardo T. Salvador - Cambridge MA, US
Charles Oswald - Salem NY, US

International Classification:

H04R 3/12
H04R 5/02

Abstract:

The technology described in this document can be embodied in a method that includes receiving information indicative of a volume setting corresponding to each listening zone of a plurality of listening zones. The method also includes generating a zone-specific adjustment signal for each of the plurality of listening zones, wherein the zone-specific adjustment signal for a given listening zone accounts for a cross-zone effect associated with a volume setting corresponding to another listening zone, and is configured to adjust an output of corresponding zone-specific circuitry. The method further includes generating an additional adjustment signal configured to adjust an output of a cross-zone equalization filter. The output of the cross-zone equalization filter is configured to generate a target acoustic distribution across multiple listening zones. The method also includes generating an output of an acoustic transducer of the multi-zone audio system based on the zone-specific adjustment signals and the additional adjustment signal.

US Patent:

20180122355, May 3, 2018

Filed:

Nov 14, 2017

Appl. No.:

15/812371

Inventors:

- Framingham MA, US
Eduardo T. Salvador - Cambridge MA, US
Jeffery R. Vautin - Worcester MA, US
Michael S. Dublin - Arlington MA, US
Daniel Ross Tengelsen - Framingham MA, US
Christopher B. Ickler - Sudbury MA, US

Assignee:

Bose Corporation - Framingham MA

International Classification:

G10K 11/178
H03G 3/20
H04S 3/00
H04S 7/00
H03G 5/16

Abstract:

An audio system includes a plurality of near-field speakers arranged in a listening area. A plurality of cross-talk cancellation filters are coupled to the speakers. The speakers and the filters are arranged to provide first and second listening zones in the listening area such that audio from the first listening zone is cancelled in the second listening zone and vice versa. The system also includes at least one audio source providing audio content. Volume-based equalization circuitry receives an audio signal representing audio content for the first listening zone from the audio source and controls a volume adjustment applied to the audio signal to control a volume of audio in the first listening zone. The circuitry limits attenuation or amplification of a first frequency portion of the audio signal when a volume setting differential corresponding to a difference between volume settings for the first and second zones exceeds a predetermined value.