Directional control of sound in a vehicle

• US 20120121113A1
• Filed: 11/16/2010
• Published: 05/17/2012
• Est. Priority Date: 11/16/2010
• Status: Abandoned Application

• Current Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Original Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Inventors: Li, Yunhong
• Application Number:
  US12/927,464
• Publication Number:
  US 20120121113A1
• Time in Patent Office: Days
• US Class Current: 381/302
• CPC Class Codes: H04R 1/403 loud-speakers
• CPC Class Codes: H04R 3/005 for combining the signals of two or more microphones specially adapted for hearing aids H04R25/407

Abstract

A system for directing sound in a vehicle includes a passenger selector, a controller, a pattern generator and a speaker array. The passenger selector is configured to generate a direction signal based on a selection of at least one passenger in the vehicle. The controller is configured to generate a pattern signal based on the direction signal. The pattern generator is configured to receive unpatterned audio data and to generate patterned audio data based on the pattern signal. The speaker array is configured to receive the patterned audio data and to generate a directed sound field based on the patterned audio data such that the directed sound field is directed toward the at least one selected passenger.

Claims

1. A system for directing sound in a vehicle, comprising:

a passenger selector configured to generate a direction signal based on a selection of at least one passenger in the vehicle;

a controller configured to generate a pattern signal based on the direction signal;

a pattern generator configured to receive unpatterned audio data and to generate patterned audio data based on the pattern signal; and

a speaker array configured to receive the patterned audio data and to generate a directed sound field based on the patterned audio data such that the directed sound field is directed toward the at least one selected passenger.

2. The system of claim 1, wherein the pattern generator comprises a plurality of filters configured to apply filter coefficients to the unpatterned audio data to generate the patterned audio data.

3. The system of claim 2, wherein:

the controller is configured to generate the filter coefficients based on the direction signal; and

the pattern signal comprises the filter coefficients.

4. The system of claim 1, wherein the directed sound field comprises sound reduction directed toward at least one unselected passenger.

5. The system of claim 1, further comprising:

an audio manager configured to receive sound system audio from a sound system in the vehicle and to generate the unpatterned audio data from the sound system audio.

6. The system of claim 5, wherein the audio manager comprises:

a separator configured to separate the sound system audio into high frequency audio and low frequency audio; and

a synchronizer configured to synchronize the high frequency audio with the low frequency audio.

7. The system of claim 6, wherein the audio manager is further configured to provide the high frequency audio as the unpatterned audio data and to redirect the low frequency audio back to the sound system.

8. The system of claim 5, wherein:

the audio manager comprises the passenger selector; and

the audio manager is coupled to the controller.

9. The system of claim 1, wherein:

the speaker array comprises a first speaker array;

the patterned audio data comprises first patterned audio data;

the directed sound field comprises a first directed sound field;

the at least one selected passenger comprises at least one first selected passenger; and

the system further comprises a second speaker array configured to generate a second directed sound field directed toward at least one second selected passenger based on second patterned audio data.

10. A method for directing sound in a vehicle, comprising:

receiving a selection of at least one passenger;

generating a direction signal based on the selection, wherein the direction signal indicates in which direction the at least one selected passenger is seated compared to a speaker array;

generating a pattern signal based on the direction signal;

generating patterned audio data based on unpatterned audio data and the pattern signal; and

outputting from the speaker array a directed sound field based on the patterned audio data, wherein the directed sound field is directed toward the at least one selected passenger.

11. The method of claim 10, wherein generating the patterned audio data comprises applying a plurality of filters to the unpatterned audio data.

12. The method of claim 11, wherein generating the pattern signal comprises providing filter coefficients for each of the filters.

13. The method of claim 10, wherein the directed sound field comprises sound reduction directed toward at least one unselected passenger.

14. The method of claim 10, further comprising:

receiving sound system audio from a sound system;

separating the sound system audio into high frequency audio and low frequency audio; and

synchronizing the high frequency audio with the low frequency audio.

15. The method of claim 14, further comprising:

providing the high frequency audio as the unpatterned audio data; and

redirecting the low frequency audio back to the sound system.

16. A method for directing sound in a vehicle, comprising:

receiving event data;

generating a direction signal based on the event data, wherein the direction signal indicates in which direction a driver of the vehicle is seated compared to a speaker array;

generating a pattern signal based on the direction signal;

generating patterned audio data based on the event data and the pattern signal; and

outputting from the speaker array a directed sound field based on the patterned audio data, wherein the directed sound field is directed toward the driver.

17. The method of claim 16, wherein the event data comprises a notification of a siren.

18. The method of claim 17, wherein the event data further comprises location information.

19. The method of claim 18, wherein the location information comprises a direction of the siren compared to the vehicle.

20. The method of claim 19, wherein the directed sound field is further directed toward one of a left, a right, a front and a back of the driver based on the direction of the siren.