Loudspeaker system for producing multiple sound images within a listening area from dual source locations

• US 5,557,680 A
• Filed: 04/19/1995
• Issued: 09/17/1996
• Est. Priority Date: 04/19/1995
• Status: Expired due to Fees

• Current Assignee: Thomas A. Janes
• Original Assignee: Thomas A. Janes
• Inventors: Janes, Thomas A.
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): HARVEY, MINSUN OH
• Application Number:
  US08/425,856
• Time in Patent Office: 517 Days
• Field of Search: 381/24, 381/27, 381/1, 381/17, 381/188, 381/205
• US Class Current: 381/27
• CPC Class Codes: H04R 5/02 Spatial or constructional arrangements of loudspeakers
• CPC Class Codes: H04S 1/002 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

Abstract

A loudspeaker system comprises two spaced-apart sound cabinets with the first cabinet housing a speaker driver directed toward a listener and couplable to a left channel signal to create a left channel sound image and a second speaker mounted in a second of the cabinets and couplable to a right channel to create a right channel sound image in a listening area. Third and fourth speaker drivers are positioned, one in each of the two sound cabinets, proximate to one of the first and second speaker drivers. The third and fourth drivers have axes which are angled with respect to the axes of the first and second drivers and are couplable to a signal having frequency components of center channels. The sound images created by the third and fourth drivers are focused inwardly in the listening area between the right and left channel sound images to create a focused center channel image in the listening area and thereby provide a listener with multiple-sound images generated from two sound cabinets for more realistic sound presentation.

Claims

1. A loudspeaker system for producing, in a listening area, realistic sound images from an audio signal generator with a multiplicity of audio signal channels, the system comprising:

two spaced-apart sound cabinets for housing speaker drivers;

a first speaker driver mounted in a first of the defined cabinets and having an axis directed toward the listening area, the first driver configured for being coupled to a first channel signal of said audio signal generator and operable for receiving said first channel signal and creating a first channel sound image forward of the cabinet and into the listening area;

a second speaker driver mounted in a second of the cabinets and having an axis directed toward the listening area, the second driver configured for being coupled to a second channel signal of said audio signal generator and operable for receiving said second channel signal and creating a second channel sound image forward of the cabinet and into the listening area;

a third speaker driver mounted in said first cabinet and physically spaced from said first driver, the third driver having an axis oriented toward the listening area and at an angle to said first driver axis, the third driver configured for being coupled to a signal having frequency components of a third channel from said audio signal generator for receiving said signal and directing sound with third channel components into the listening area at an angle to the first channel sound image;

a fourth speaker driver mounted in said second cabinet and spaced from said second driver, the fourth driver having an axis oriented toward the listening area and at an angle to said second driver axis, the fourth driver configured for being coupled to a signal having components of a third channel for receiving said signal and directing sound with third channel components into the listening area at an angle to the second channel sound image;

when the first and second cabinets are adjacent to one another with the axis of the first and second devices facing forward to the listening area and the axes of the third and fourth drivers directed inwardly to a location in the listening area between the first and second cabinets, the third and fourth drivers being operable for creating, in the listening area location between the first and second channel sound images, a focused sound image having components of a third channel to provide a listener in the listening area with at least three sound images generated from two sound cabinet locations to create a more realistic sound presentation for the listener.

2. The loudspeaker system of claim 1 wherein the axis of the third driver is angled with respect to the first driver axis in a range of approximately 20 to 45 degrees.

3. The loudspeaker system of claim 1 wherein the axis of the fourth driver is angled with respect to the second driver axis in a range of approximately 20 to 45 degrees.

4. The loudspeaker system of claim 1 wherein the first driver is further operable for receiving a left channel signal and generating a left channel sound image.

5. The loudspeaker system of claim 1 wherein the second driver is further operable for receiving a right channel signal and generating a right channel sound image.

6. The loudspeaker system of claim 1 wherein one of said third and fourth drivers is further operable for receiving a signal having components of a center channel and generating a center channel sound image.

7. The loudspeaker system of claim 1 wherein one of said third and fourth drivers is further operable for receiving a signal which is a combination of a left channel signal and a center channel signal for generating a sound image with said components of the left and center channels.

8. The loudspeaker system of claim 1 wherein one of said third and fourth drivers is further operable for receiving a signal which is a combination of a right channel signal and a center channel signal for generating a sound image with sound components of the right and center channels.

9. An acoustic system for producing, in a listening area, realistic sound images from multiple channels, the system comprising:

an audio signal generator operable for generating at least first, second and third channel signals;

two spaced-apart sound cabinets for housing speaker drivers;

a first speaker driver mounted in a first of the cabinets and having an axis directed toward the listening area, the first driver electrically coupled to said audio signal generator for receiving said first channel signal, the first driver operable for creating a first channel sound image forward of the cabinet into the listening area;

a second speaker driver mounted in a second of the cabinets and having an axis directed toward the listening area, the second driver electrically coupled to said audio signal generator for receiving said second channel signal, the second driver operable for creating a second channel sound image forward of the cabinet into the listening area;

a third speaker driver mounted in said first cabinet and physically spaced from said first driver, the third driver having an axis oriented toward the listening area and at an angle to said first driver axis, the third driver electrically coupled to said audio signal generator for receiving a signal having components of a third channel, the third driver operable for directing sound with third channel components into the listening area at an angle to the first channel sound image;

a fourth speaker driver mounted in said second cabinet and spaced from said second driver, the fourth driver having an axis oriented toward the listening area and at an angle to said second driver axis, the fourth driver electrically coupled to said audio signal generator for receiving a signal having components of a third channel, the fourth driver operable for directing sound with third channel components at an angle to the second channel sound image;

when the first and second cabinets are adjacent to one another with the axis of the first and second drivers facing the listening area and the axes of the third and fourth drivers directed inwardly to a location in the listening area between the first and second cabinets, the third and fourth drivers being operable for creating, in the listening area location between the first and second channel sound images, a focused sound image having components of a third channel to provide a listener in the listening area with at least three sound images generated from two sound cabinet locations to create a more realistic sound presentation for the listener.

10. The acoustic system of claim 9 wherein the axis of the third driver is angled with respect to the first driver axis in a range of approximately 20 to 45 degrees.

11. The acoustic system of claim 9 wherein the axis of the fourth driver is angled with respect to the second driver axis in a range of approximately 20 to 45 degrees.

12. The acoustic system of claim 9 wherein the audio signal generator outputs a left channel signal and the first driver is further operable for receiving said left channel signal and generating a left channel sound image.

13. The acoustic system of claim 9 wherein the audio signal generator outputs a right channel signal and the second driver is further operable for receiving said right channel signal and generating a right channel sound image.

14. The acoustic system of claim 9 wherein the audio signal generator produces a center channel signal and a signal with said third and fourth drivers are operable for receiving a signal with center channel components to generate a center channel sound image.

15. A method for producing realistic sound images from an audio signal generator with a multiplicity of audio signal channels, the method comprising:

positioning a first speaker driver to be oriented generally toward a predetermined area;

coupling the first driver to a first channel signal of said audio signal generator, the first driver operable for receiving said first channel signal and creating a first channel sound image in the area forward of the first driver;

positioning a second speaker driver at a location spaced from the first speaker driver to also be oriented generally toward said predetermined area;

coupling the second driver to a second channel signal of said audio signal generator, the second driver operable for receiving said second channel signal and creating a second channel sound image in the area forward of the second driver;

positioning a third speaker driver proximate to said first driver and oriented generally toward the area at an angle to said first driver;

coupling the third driver to a signal having components of a third channel from said audio signal generator, the third driver operable for receiving said signal and creating sound with third channel components in the area at an angle to the first channel sound image;

positioning a fourth speaker driver proximate to said second driver and oriented generally toward the area at an angle to said second driver;

coupling the fourth driver to a signal also having components of said third channel from said audio signal generator, the fourth driver operable for receiving said signal and creating sound with third channel components at an angle to the second channel sound image;

placing the drivers adjacent to one another with the first and second drivers generally oriented to produce adjacent sound images in the area and the third and fourth drivers directed inwardly of the direction of the first and second drivers such that the third and fourth drivers collectively present a focused sound image having components of said third channel in the area and between the first and second channel sound images to provide a listener with at least three sound images generated from generally two locations whereby a more realistic sound presentation is created for the listener.

16. The method of claim 15 further comprising positioning the third driver such that it is angled with respect to said first driver in a range of approximately 20 to 45 degrees.

17. The method of claim 15 further comprising positioning the fourth driver such that it is angled with respect to said second driver in a range of approximately 20 to 45 degrees.

18. The method of claim 15 further comprising coupling the first driver to a left channel signal for generating a left channel sound image.

19. The method of claim 15 further comprising coupling the second driver to a right channel signal for generating a right channel sound image.

20. The method of claim 15 further comprising coupling one of said third and fourth drivers to a center channel signal for generating a sound image having center channel components.

21. The method of claim 15 further comprising coupling one of said third and fourth drivers to a signal which is a combination of a left channel signal and a center channel signal for generating a sound image with sound components of the left and center channels.

22. The method of claim 15 further comprising coupling one of said third and fourth drivers to a signal which is a combination of a right channel signal and a center channel signal for generating a sound image with sound components of the right and center channels.

23. A loudspeaker system for producing realistic sound images from an audio signal generator with a multiplicity of audio signal channels, the system comprising:

a first speaker driver mounted in a sound cabinet, the first driver configured for being coupled to a first channel signal of said audio signal generator and operable for receiving said first channel signal and creating a first channel sound image, the first speaker driver directing said first channel sound image into an area forward of the driver;

a second speaker driver mounted in a second sound cabinet, the second driver configured for being coupled to a second channel signal of said audio signal generator and operable for receiving said second channel signal and creating a second channel sound image, the second speaker driver directing said second channel sound image into an area forward of the driver;

a third speaker driver mounted in said first cabinet and physically spaced from said first driver, the third driver being oriented at an angle to said first driver and configured for being coupled to a signal having components of a third channel from said audio signal generator, the third driver operable for receiving said signal and directing sound with third channel components forward of the driver at an angle to the first channel sound image;

a fourth speaker driver mounted in said second cabinet and physically spaced from said second driver, the fourth driver being oriented at an angle to said second driver, and configured for being coupled to a signal also having components of a third channel from said audio signal generator, the fourth driver operable for receiving said signal and directing sound with third channel components forward of the driver at an angle to the second channel sound image;

when the first and second cabinets are adjacent to one another with the first and second drivers generally oriented to produce first and second channel sound images generally adjacent to one another, the third and fourth drivers being directed at an angle inwardly of the direction of the first and second drivers and being operable for collectively creating, between the first and second channel sound images, a focused sound image having components of said third channel to provide a listener with at least three channel sound images generated from two sound cabinet locations to create a more realistic sound presentation for the listener.

24. The loudspeaker system of claim 23 wherein the third driver is angled with respect to the first driver in a range of approximately 20 to 45 degrees.

25. The loudspeaker system of claim 23 wherein the fourth driver is angled with respect to the second driver in a range of approximately 20 to 45 degrees.

26. The loudspeaker system of claim 23 wherein the first driver is further operable for receiving a left channel signal and generating a left channel sound image.

27. The loudspeaker system of claim 23 wherein the second driver is further operable for receiving a right channel signal and generating a right channel sound image.

28. The loudspeaker system of claim 23 wherein one of said third and fourth drivers is further operable for receiving a signal having components of a center channel and generating a center channel sound image.

29. The loudspeaker system of claim 23 wherein one of said third and fourth drivers is further operable for receiving a signal which is a combination of a left channel signal and a center channel signal for generating a sound image with said components of the left and center channels.

30. The loudspeaker system of claim 23 wherein one of said third and fourth drivers is further operable for receiving a signal which is a combination of a right channel signal and a center channel signal for generating a sound image with sound components of the right and center channels.