Method for active noise reduction in an electric or hybrid vehicle and a correspondingly equipped vehicle

Patent metadata

Field	Value
Publication number	US-11004436-B2
Application number	US-202016775328-A
Country	US
Kind code	B2
Filing date	Jan 29, 2020
Priority date	Jan 30, 2019
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A method for active noise reduction in an electric or hybrid vehicle includes (i) detecting noise in an area surrounding the vehicle by at least one sound recording apparatus which is attached to the vehicle, and (ii) generating anti-phase sound by at least one sound output apparatus, which is attached to the vehicle, depending on a signal recorded by the sound recording apparatus. The generated anti-phase sound is generated with respect to a portion of the noise in the area surrounding the vehicle and is output into the area surrounding the vehicle. Also described is a corresponding electric or hybrid vehicle which is designed to perform active noise reduction with respect to its ambient noise.

First claim

What is claimed:

1. A method for active noise reduction in an electric or hybrid vehicle, said method comprising:
detecting noise in an area surrounding the vehicle by means of at least one sound recording apparatus which is attached to the vehicle; and
generating anti-phase sound by means of at least one sound output apparatus, which is attached to the vehicle, depending on a signal recorded by the sound recording apparatus, wherein the generated anti-phase sound is generated with respect to a portion of the noise in the area surrounding the vehicle and is output into the area surrounding the vehicle.

2. The method for active noise reduction as claimed in claim 1 , further comprising:
processing the detected noise by means of a control unit for generating an actuation signal for the sound output apparatus.

3. The method for active noise reduction as claimed in claim 2 , wherein the control unit is an acoustics generating module which is already present in the vehicle.

4. The method for active noise reduction as claimed claim 1 , wherein the anti-phase sound is generated only with respect to at least one predetermined frequency band of the noise which is detected in the area surrounding the vehicle.

5. The method for active noise reduction as claimed in claim 4 , wherein the at least one predetermined frequency band with respect to which the anti-phase sound is generated is defined by the noise which is produced during charging of the vehicle.

6. A method for active noise reduction in an electric or hybrid vehicle, said method comprising:
detecting noise in an area surrounding the vehicle by means of at least one sound recording apparatus which is attached to the vehicle; and
generating anti-phase sound by means of at least one sound output apparatus, which is attached to the vehicle, depending on a signal recorded by the sound recording apparatus, wherein the generated anti-phase sound is generated with respect to a portion of the noise in the area surrounding the vehicle and is output into the area surrounding the vehicle, wherein the anti-phase sound is generated only with respect to at least one predetermined frequency band of the noise which is detected in the area surrounding the vehicle; and
adjusting a sound pressure of the generated anti-phase sound depending on the sound pressure of the noise in the at least one predetermined frequency band.

7. An electric or hybrid vehicle with active ambient noise reduction, said electric or hybrid vehicle comprising:
at least one sound recording apparatus which is attached to the vehicle and is configured to detect noise in an area surrounding the vehicle;
at least one sound output apparatus which is attached to the vehicle and is configured to output sound to the ambient area surrounding the vehicle;
a control unit which is coupled to the sound recording apparatus and to the sound output apparatus and is configured to actuate the sound output apparatus depending on a signal recorded by the sound recording apparatus, in such a way that said sound output apparatus outputs an anti-phase sound to a portion of the detected noise.

8. The electric or hybrid vehicle as claimed in claim 7 , wherein the control unit is configured to actuate the sound output apparatus in such a way that the anti-phase sound is generated only with respect to at least one predetermined frequency band of the detected noise.

9. The electric or hybrid vehicle as claimed in claim 8 , wherein the at least one predetermined frequency band with respect to which the anti-phase sound is generated is defined by the noise which is produced during charging of the vehicle.

10. The method for active noise reduction as claimed in claim 1 , wherein the at least one sound output apparatus is located outside of a passenger cabin of the vehicle.

11. The electric or hybrid vehicle as claimed in claim 7 , wherein the at least one sound output apparatus is located outside of a passenger cabin of the vehicle.

Assignees

• Porsche Ag

Inventors

• Heyne Raoul
• Schneider-Schaper Alexander

Classifications

• G05D19/02

  characterised by the use of electric means · CPC title

• B60Q5/00

  Arrangement or adaptation of acoustic signal devices · CPC title

• G10K11/17857

  Geometric disposition, e.g. placement of microphones · CPC title

• G10K11/17823 Primary

  Reference signals, e.g. ambient acoustic environment · CPC title

• G10K11/17873

  using a reference signal without an error signal, e.g. pure feedforward · CPC title