Convertible automobile sound system equalizing

• US 20040247141A1
• Filed: 06/09/2003
• Published: 12/09/2004
• Est. Priority Date: 06/09/2003
• Status: Active Grant

• Current Assignee: Bose Corporation
• Original Assignee: Bose Corporation
• Inventors: Holmi, Douglas J., Torio, Guy A.
• Granted Patent: US 7,583,806 B2
• Time in Patent Office: Days
• US Class Current: 381/86
• CPC Class Codes: H04R 2205/024 Positioning of loudspeaker enclosures for spatial sound reproduction
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles
• CPC Class Codes: H04S 7/307 Frequency adjustment, e.g. tone control H04S7/301 takes precedence

Abstract

A convertible automobile sound system is responsive to the state of the convertible automobile top for providing equlization to speakers related to the state of the convertible top.

Claims

1. A convertible automobile sound system comprising,

a plurality of loudspeakers,

a source of a top state signal representative of the state of the convertible automobile top,

equalization circuitry coupled to said loudspeakers and responsive to said top state signal for providing equalization related to the state of the convertible top.

2. A convertible automobile sound system in accordance with claim 1 wherein said source of a top state signal provides a top up signal when the convertible automobile top is up and a top down signal when the convertible automobile top is down so that the radiated power by said plurality of loudspeakers as a function of frequency is substantially the same when the top is up as when the top is down.

3. A convertible automobile sound system in accordance with claim 2 wherein said plurality of loudspeakers comprise left, right and center dash speakers seated on the convertible automobile dash, left and right door speakers mounted in left and right front doors respectively of the convertible automobile,

left outside, left inside, right inside and right outside seat speakers respectively mounted in left and right seats of said convertible automobile,

a seven-channel amplifier including said equalization circuitry,

a signal source constructed and arranged to furnish sound signals to the seven channels of said seven-channel amplifier,

the first of said channels constructed and arranged to energize said left dash speaker with a front left input signal,

the second of said channels constructed and arranged to energize said right dash speaker with a front right input signal,

the third of said channels constructed and arranged to energize said left door speaker with a front left input signal,

the fourth of said channels constructed and arranged to energize said left seat speakers with rear left input signal,

the fifth of said channels constructed and arranged to energize said right seat speakers with rear right input signal,

the sixth of said channels constructed and arranged to energize said right door speaker with front right input signal,

and the seventh of said channels constructed and arranged to energize said center dash signal with a monaural signal that is half the sum of the left and right front input signals.