Apparatus for the creation of a desirable acoustical virtual reality

• US 6,075,868 A
• Filed: 12/08/1997
• Issued: 06/13/2000
• Est. Priority Date: 04/21/1995
• Status: Expired due to Fees

• Current Assignee: BSG Laboratories Incorporated
• Original Assignee: BSG Laboratories Incorporated
• Inventors: Dickman, Josh, Ryle, Darren P., McGinnis, Gary, Goldfarb, Barry S.
• Primary Examiner(s): CHIN, VIVIAN C
• Application Number:
  US08/986,712
• Time in Patent Office: 918 Days
• Field of Search: 381/335, 381/388, 381/396, 381/301, 381/300, 381/333, 381/334, 381/332
• US Class Current: 381/301
• CPC Class Codes: H04R 1/02 Casings; Cabinets ; Supports therefor; Mountings therein H04R1/28 takes precedence ; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075
• CPC Class Codes: H04R 5/02 Spatial or constructional arrangements of loudspeakers
• CPC Class Codes: H04S 1/00 Two-channel systems H04S5/00, H04S7/00 take precedence
• CPC Class Codes: H04S 3/00 Systems employing more than two channels, e.g. quadraphonic H04S5/00, H04S7/00 take precedence

Abstract

A portable collapsible seat with an advanced five-driver integral audio system is disclosed. The seat is designed to be used in conjunction with a video screen to create an enhanced "virtual reality" environment. The placement of the drivers relative to the user'"'"'s head, combined with the intentionally different bandwidths of sound produced by the different drivers, and the relative acoustical intensities of the drivers produces psychologically "gripping" effect, designed to transport the user away from the reality of the actual surroundings and into the virtual reality of the video presentation. One of the drivers is intentionally oriented and positioned to provide tactilly perceivable vibration through the seat to the user.

Claims

1. An apparatus for the creation of an immersive acoustic environment, comprising:

a seat having a left side and a right side, said seat including;

a seat back having a back support surface, and

a seat base having a base support surface, said seat back and said seat base joining along a joint line, said seat base extending from said joint line to a front end; and

,

a sound system including a plurality of sound drivers, part of said sound system being integral to or attached to said seat during use, said sound system including;

a pair of said drivers connected to said seat substantially symmetrically about a sagittal plane separating said left and right sides, and

a third of said drivers positioned toward said front end and substantially coincident with said sagittal plane;

whereby said sound system generates an immersive acoustic environment for a user seated in said seat by providing acoustic sources to the left and right of the seated user in the form of said pair of said drivers and an acoustic source in the form of said third of said drivers along the sagittal plane of the seat that substantially coincides with a central sagittal axis of the user.

2. The apparatus of claim 1, wherein positions of said first pair of drivers and said third driver define a triangle, such that the angle formed by a first line joining said first pair of drivers and a second line joining one of said first pair of drivers and said third driver is greater than 45 degrees, said triangle defining a plane non-coincident to said sagittal plane.

3. The apparatus of claim 2, wherein said first pair of drivers are positioned less than 12 inches forward of said joint line.

4. The apparatus of claim 2, further comprising a fourth driver connected to said seat, said third and fourth drivers having input circuitry configured to sum to mono a stereo input.

5. The apparatus of claim 4, wherein said fourth driver is a sub-woofer producing sound substantially only below 100 Hz.

6. The apparatus of claim 5, wherein said third driver is mounted on said seat adjacent said front end.

7. The apparatus of claim 6, wherein said pair of drivers have input circuitry to separate a left stereo channel to one of said pair and right stereo channel to the other of said pair.

8. The apparatus of claim 5, wherein said sub-woofer is mounted in the seat back and oriented with its axis of motion perpendicular to said back support surface.

9. The apparatus of claim 5, wherein said sub-woofer comprises a sub-woofer driver driving on it'"'"'s face side a first ported acoustical resonance volume tuned to resonate at a first resonant frequency, and driving on its back side a second, ported acoustical resonance volume tuned to resonate at a second resonant frequency, where said first and second resonant frequencies are aligned relative to each other in frequency such that two of their 3 dB points approximately coincide, producing a broadened, flatter resonant response.

10. The apparatus of claim 6, further comprising a lower-frequency tuned cavity and a higher-frequency tuned cavity, each driven acoustically by opposite sides of said sub-woofer driver.

11. The apparatus of claim 1, wherein said first pair of drivers and said third driver are mounted in said seat.

12. The apparatus of claim 1, wherein said third driver is a loudspeaker for producing sound between 150 Hz and 10 kHz.

13. A foldable seat assembly with integral electromechanical transducer system for the creation of an immersive acoustic environment, comprising:

a back section including a back support surface;

a base section including a base support surface;

a hinge hinging said back section and said base section together, said back section and said base section capable of being disposed in either an open position or a closed position; and

, said seat in said closed position configured to become a carrying case,

a sound system including;

a pair of drivers connected to said seat substantially symmetrically about a sagittal plane separating left and right sides of said seat, and

at least one electromechanical transducer mounted in one of said back section and said base section, capable of operating in or below the audio range;

whereby said sound system generates an immersive acoustic environment for a user seated in said seat by providing acoustic sources to the left and right of the seated user in the form of said pair of said drivers and a non-directional acoustic source in the form of said at least one electromechanical transducer mounted on said seat adjacent a user sitting in said seat, and whereby the assembly for creating the immersive acoustic environment can be moved in a portable configuration carryable by the user.

14. The seat assembly of claim 13, wherein said transducer comprises an electromechanical vibration transducer capable of producing vibrations tactilly perceivable by a listener seated in said seat.

15. The seat assembly of claim 14, further comprising an internal power amplifier for driving said electro-mechanical vibration transducer.

16. The seat assembly of claim 14, further comprising at least one acoustical audio transducer capable of producing sound having frequencies substantially above 100 Hz.

17. The seat assembly of claim 16, further comprising a detent mechanism capable of locking the seat in either the fully open or closed positions.

18. The seat assembly of claim 16, further comprising internal electronic power amplifier means for powering said electromechanical transducer.

19. The seat assembly of claim 16, further comprising a sub-woofer driver driving on it'"'"'s face side a first ported acoustical resonance volume tuned to resonate at a first resonant frequency, and driving on its back side a second, ported acoustical resonance volume tuned to resonate at a second resonant frequency, where said first and second resonant frequencies are aligned relative to each other in frequency such that two of their 3 dB points approximately coincide, producing a broadened, flatter resonant response.

20. The seat assembly of claim 14, further comprising transducer-specific audio intensity limiter capable of limiting the acoustic intensity produced by each transducer to levels safe for human hearing.

21. The apparatus of claim 13 disposed in the closed position, wherein said base section includes a bottom end disposed opposing said hinge and said back section includes a top end disposed opposing said hinge, and wherein said bottom end and said top end are adjacent.

22. An apparatus for the creation of an acoustical virtual reality, comprising:

a seat having a seat back including a back support surface and a seat base including a base support surface, and having a left side and a right side, said seat back and said seat base joining alone a joint line, said seat base extending from said joint line to a front end; and

,

a sound system, part of which is integral to or attached to said seat during use;

said sound system including a plurality of sound drivers, a first pair of said drivers being connected to said seat substantially symmetrically about a sagittal plane separating said left and right sides of said seat, said first pair of drivers positioned less than 12 inches forward of said joint line;

a third of said drivers being positioned in a forward direction from said first pair of said drivers toward said front end and substantially coincident with said sagittal plane, said first pair of drivers and said third driver positioned to define a triangle, such that the angle formed by a first line joining said first pair of drivers and a second line joining one of said first pair of drivers and said third driver is greater than 45 degrees;

a fifth driver mounted to said seat back reproducing substantially only higher frequencies in the audio range above 16 kHz, the input to said driver being a substantially summed-to-mono signal, said fifth driver being placed substantially coincident with said sagittal plane.

23. An apparatus for the creation of an acoustical virtual reality, comprising:

a seat having a seat back including a back support surface and a seat base including a base support surface, and having a left side and a right side, said seat back and said seat base joining along a joint line, said seat base extending from said joint line to a front end, said seat physically reconfigurable to become a carrying case for said sound system and seat; and

,

a sound system, part of which is integral to or attached to said seat during use;

said sound system including a plurality of sound drivers, a pair of said drivers being connected to said seat substantially symmetrically about a sagittal plane separating said left and right sides of said seat;

a third of said drivers positioned in a forward direction from said first pair of said drivers on said seat adjacent said front end and substantially coincident with said sagittal plane.

24. An apparatus for the creation of an acoustical virtual reality, comprising:

a seat having a seat back including a back support surface and a seat base including a base support surface, and having a left side and a right side, said seat back and said seat base joining along a joint line, said seat base extending from said joint line to a front end; and

,

a sound system, part of which is integral to or attached to said seat during use;

said sound system including a plurality of sound drivers, a pair of said drivers being connected to said seat substantially symmetrically about a sagittal plane separating said left and right sides of said seat, said seat base has lateral sides extending between the joint line and the front end and a wing extending from each of said lateral sides, one of said pair of drivers being mounted in each wing and facing upwardly;

third of said drivers being positioned in a forward direction from said first pair of said drivers toward said front end and substantially coincident with said sagittal plane, said first pair of drivers and said third driver positioned to define a triangle, such that the angle formed by a first line joining said first pair of drivers and a second line joining one of said first pair of drivers and said third driver is greater than 45 degrees;

a fourth driver connected to said seat, said third and fourth drivers having input circuitry configured to sum to mono a stereo input, said fourth driver is a sub-woofer mounted in the seat back producing sound substantially only below 100 Hz and oriented with its axis of motion perpendicular to said back support surface.

25. An apparatus for the creation of an acoustical virtual reality, comprising:

a back section including a back support surface, and a base section including a base support surface, hinged to each other at a hinge, and a capable of being disposed in either an open position or a closed position, and at least one electromechanical transducer mounted in one of said back section and said base section, capable of operating in or below the audio range, said transducer comprises an electromechanical vibration transducer capable of producing vibrations tactilly perceivable by a listener seated in said seat;

at least one acoustical audio transducer capable of producing sound having frequencies substantially above 100 Hz; and

,

a carry handle, wherein said carry handle acts to oppose linear force when the seat is being carried, and acts to oppose the torque about the hinge joint caused by a listener leaning back while using the seat in the open position.

26. An apparatus for the creation of an acoustical virtual reality, comprising:

a seat having a seat back including a back support surface and a seat base including a base support surface, and having a left side and a right side, said seat back and said seat base joining along a joint line, said seat base extending from said joint line to a front end; and

,

a sound system, part of which is integral to or attached to said seat during use;

said sound system including a plurality of sound drivers, a pair of said drivers being connected to said seat substantially symmetrically about a sagittal plane separating said left and right sides of said seat;

a third of said drivers being positioned in a forward direction from said first pair of said drivers on said seat adjacent said front end and substantially coincident with said sagittal plane, said first pair of drivers and said third driver positioned to define a triangle, such that the angle formed by a first line joining said first pair of drivers and a second line joining one of said first pair of drivers and said third driver is greater than 45 degrees;

a fourth driver connected to said seat, said third and fourth drivers having input circuitry configured to sum to mono a stereo input, said fourth driver is a sub-woofer producing sound substantially only below 100 Hz;

a lower-frequency turned cavity and a higher-frequency tuned cavity, each driven acoustically by opposite sides of said sub-woofer, each tuned cavity comprises enclosing walls and an exit port, and one of the enclosing walls of the lower-frequency tuned cavity comprises a seat back against which the listener'"'"'s back rests.