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US4567959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker adapted to corner-loaded installation
Assignee: Individual
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Filing: 1985-04-10
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Granted: 1986-02-04
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Expires: 2005-04-10
Abstract
Abstract A limited space, small enclosure bass speaker module is shown, for providing an enhanced perception and sound level of bass frequencies. An acoustic transducer is mounted on an end of a closed elongated, cylindrical member of rigid construction. The cylinder provides acoustic loading of the transducer, and can be either an acoustic suspension or a bass reflex form; the bass reflex form has the bass reflex port located coplanar to the transducer. The resulting structure is a an oriented point source. The module is then acoustically coupled to its surroundings by being mounted so that the transducer face is in a corner. The result is to convert the surrounding environment into one element of a horn loaded speaker, producing an enhanced bass effect.
Inventors
- 👤 David A. Prophit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:10
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2815; H04R1/2819
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A bass module speaker for providing enchanced bass response within an environment space having corners, comprising: an elongated hollow tube member having a closed and an open end; electro-acoustic driver means sealingly mounted in said open end; a reflex duct extending longitudinally along an exterior side of said elongated tube member extending from said closed end to said open end; said duct having a closed end adjacent to the closed end of said tube; said duct being connected acoustically to said tube through a port intermediate said duct and said tube member adjacent said closed ends; and said port having an open end face in the plane of said electro-acoustic driver means.
Claim 2
Dependent Claim
112 words
A bass module speaker for providing enchanced bass response within an environment space having corners, comprising: an elongated hollow tube member having a closed and an open end; electro-acoustic driver means sealingly mounted in said open end; a reflex duct extending longitudinally along an exterior side of said elongated tube member extending from said closed end to said open end; said duct having a closed end adjacent to the closed end of said tube; said duct being connected acoustically to said tube through a port intermediate said duct and said tube member adjacent said closed ends; and said port having an open end face in the plane of said electro-acoustic driver means.
Claim 3
Dependent Claim
45 words
Apparatus as described in claim 1 above further comprising: said driver means defining a front face plane of said tube means; and said tube member being located adjacent a corner of the environment, said defined plane being parallel to an adjacent wall of said corner.
Claim 4
Dependent Claim
21 words
The apparatus as described in claim 2 above wherein said front face plane is located approximately three inches from said wall.
Claim 5
Dependent Claim
30 words
The apparatus as described in claim 1 above wherein said tube member and said duct, as acoustically coupled through said port, have a free-space reflex resonance of approximately 45 Hertz.
Claim 6
Dependent Claim
18 words
The apparatus as described in claim 1 above wherein said speaker has a cone resonance above 70 Hertz.
References Cited (Backward Citations)
US2880817A
Cited
US4085289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |