Claims
- 1. A speaker system for a speaker comprising,a cabinet formed of an acoustic isolation wall, and having a maximum length L among width, depth and height of an inside of the cabinet, a sound source to generate standing waves inside the cabinet, at least one partition wall situated inside the cabinet to form a space by surrounding the space, said partition wall suppressing the standing waves, at least a part of said partition wall being formed of a material which has high internal loss and a density per volume greater than 0.1 g/cm3, and a closed end portion surrounding the space, said closed end portion being formed of at least one of the partition wall and the acoustic isolation wall, wherein said material has a density per area from 0.01 g/cm2 to 0.21 g/cm2 and a characteristic of semi-transmission for at least two kinds of standing waves of wavelengths of the length L and twice of said length L among the standing waves, said space is a substantially closed space, and a surface of said partition wall directed toward the sound source is substantially flat and uninterrupt by any protrusion.
- 2. A speaker system according to claim 1, wherein said space has a total capacity more than one tenth of a capacity of the cabinet.
- 3. A speaker system according to claim 1, wherein said partition wall is made of paper box.
- 4. A method of improving sound quality of a speaker system having a cabinet formed of an acoustic isolation wall, said cabinet having a maximum length L among width, depth and height of an inside of the cabinet, comprising forming at least one partition wall to form a space for suppressing standing waves generated inside the cabinet by a sound source and a closed end portion surrounding the space, at least a part of said partition wall being formed of a material which has high internal loss and a density per volume greater than 0.1 g/cm3, and said closed end portion being formed of at least one of the partition wall and the acoustic isolation wall wherein said material has a density per area from 0.01 g/cm2 to 0.21 g/cm2 and a characteristic of semi-transmission for at least two kinds of standing waves of wavelengths of the length L and twice of said length L among the standing waves, said space is a substatially closed space, and a surface of said partition wall directed toward the sound source is substantially flat and uninterrupt by any protrusion.
- 5. A method (of improving sound quality of a speaker system) according to claim 4, wherein said partition wall is made of paper box.
- 6. A speaker system for a speaker comprising,a cabinet (7) formed of acoustic isolation walls (2, 8, 5), and having a maximum length L among width, depth and height of an inside of the cabinet (7), and at least one partition wall (9, 9a, 9b) situated inside the cabinet (7) to form a space by surrounding the space, said partition wall (9, 9a, 9b) suppressing standing waves produced inside the cabinet (7) by a sound source; said partition wall (9, 9a, 9b) being formed of a material having high internal loss; said space having a total capacity more than one tenth of a capacity of the cabinet (7), wherein a closed end (9a) of the space is located between one-half and four-fifths of a distance from one end of the length L to the other end, an opening area (o) of the same space being located at a side opposite to the closed end (9a) in a longitudinal direction of the cabinet (7) having the length L; said opening area (o) being located between four-fifths and five-fifths of a distance from one end of the length L to the other end; the partition wall (9, 9b) in the longitudinal direction continuing from the closed end (9a) to the opening area (o); a cross-sectional dimension of the space being shorter than a depth of the space; and a surface of said partition wall directed toward the sound source is substantially flat and uninterrupt by any protrusion.
- 7. A speaker system according to claim 6, wherein said partition wall is made of paper box.
- 8. A method of suppressing standing waves generated inside a cabinet by a sound source, said cabinet being formed of an acoustic isolation wall, said cabinet comprising forming at least one partition wall to form a space and a closed end portion surrounding the space, at least a part of said partition wall being formed of a material which has high internal loss and a density per volume greater than 0.1 g/cm3, and said closed end portion being formed of at least one of the partition wall and the acoustic isolation wall, wherein said material has a density per area from 0.01 g/cm2 to 0.21 g/cm2 and a characteristic of semi-transmission for standing waves, said space is a closed space, and a surface of said partition wall directed toward the sound source is substantially flat and uninterrupt by any protrusion.
- 9. A method according to claim 8, wherein said partition wall is made of paper box.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-237545 |
Jul 1992 |
JP |
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Parent Case Info
This application is a continuation of application Ser. No. 08/373,250, filed Feb. 7, 1995 now abandoned which is a 371 of PCT/JP92/01721 filed Dec. 28, 1992.
US Referenced Citations (6)
Foreign Referenced Citations (3)
Number |
Date |
Country |
A-3927178 |
Feb 1991 |
DE |
A-659818 |
Oct 1951 |
GB |
0186191 |
Sep 1985 |
JP |
Non-Patent Literature Citations (5)
Entry |
The Radio Technology, article from the magazine for audiophile, Dec. 1, 1994. |
Supplementary European Search Report in the European Patent Application No. 93900401.6 corresponding to the present application, including copies of the first pages of the references cited in the report. |
Reference 1 Remarks about GA-A-659818. |
Reference 2 (Referential material regarding technical matters such as “voice coil impedance”). |
Official Communication dated Oct. 5, 1999 from the EPO. |
Continuations (1)
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Number |
Date |
Country |
Parent |
08/373250 |
|
US |
Child |
08/842682 |
|
US |