EP1453347A1 - Lautsprechersystem - Google Patents
Lautsprechersystem Download PDFInfo
- Publication number
- EP1453347A1 EP1453347A1 EP03290457A EP03290457A EP1453347A1 EP 1453347 A1 EP1453347 A1 EP 1453347A1 EP 03290457 A EP03290457 A EP 03290457A EP 03290457 A EP03290457 A EP 03290457A EP 1453347 A1 EP1453347 A1 EP 1453347A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- loudspeaker system
- housing
- walls
- loudspeaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005855 radiation Effects 0.000 description 5
- 230000011514 reflex Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003716 rejuvenation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
- H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
Definitions
- the present invention relates to a speaker system with a housing, one in a first opening of the Speaker and a second opening, the one with a rear of the speaker over a hallway communicated.
- speaker systems are as Reflex boxes known; they allow an increase in Sound radiation power compared to Speaker systems without such a gear by the in air in the corridor efficiently to vibrations with high Fast is stimulated.
- Such a speaker system in which the passage between the back of the speaker and the second opening one Helical structure is known from JP 1 010 829 1A.
- the Here, helix is used in a limited volume of Loudspeaker housing a corridor of great length accommodate.
- the radiation behavior of the sound at the second opening aligned transversely to the helix axis not affected by the helix.
- the object of the present invention is a Loudspeaker system with high efficiency and less Distortion especially in the lower frequency range create.
- the task is accomplished through a speaker system with the Features of claim 1 solved.
- the winding course of this Speaker system induces a whirling motion in the Air vibrating around the helix axis.
- There the second housing opening in the extension of the axis is arranged, plants in the invention Loudspeaker system that is induced by the helical gear Whirling movement of air up to the second opening and beyond in the free space.
- the spiral gear can be easily through a cylindrical Pipe piece and a plurality of in the pipe piece arranged, radially oriented walls can be formed. ever the number of these walls divides the coiled gangs in two or more channels.
- the walls are part of one in the pipe section inserted screw body trained.
- Such a spiral gear is easy to manufacture.
- the walls in one piece with the pipe piece, e.g. as Extruded profile.
- the rotation of the tips of the star between opposite longitudinal ends of the helix preferably between ⁇ / n and 3 ⁇ / n, particularly preferably approx. 2 ⁇ / n. This is the minimum rotation of the tips that is required to allow a straight passage of air due to the spiral gear parallel to the axis excluded.
- the pitch of the coiled gear is preferably greater than its diameter, so the direction of vibration of the air in the spiral gear is predominantly axial and a good one Alignment of the sound radiation in the axial direction guaranteed.
- the housing tapered body arranged.
- This body can in particular be formed in one piece with the walls. It preferably has rotational symmetry with respect to the spiral axis.
- the coiled gear is also at the level of tapered body tapered inside the housing.
- the spiral passage can be tapered Body be arranged.
- the rejuvenated body has also proven to be cheap to give an aerodynamically shaped tip, the Length preferably at least as large as its diameter should be.
- FIGS. 1 and 2 show FIGS. 1 and 2 in section and in a perspective view a speaker box 1, on the front three openings are formed, one large opening 2, in which a bass speaker 3 is mounted is a small opening 4, in which a Tweeter 5 is located, and another small one Opening 6, in which a resonator arrangement 7 is attached.
- the section of FIG. 1 runs along one in FIG. 2 I-I designated, kinked level that the Resonator arrangement 7 and the bass speaker 3 each cuts axially.
- the resonator arrangement comprises in itself known a cylindrical, open at both ends Resonator tube 8. One end of the resonator tube 8 is at the Fixed front of the housing 1, the other end protrudes into its interior.
- the four walls 10 form one here Cross section transverse to axis A in the form of a four-pointed Star or cross. Other numbers of walls or peaks of the star are easily possible.
- resonator tube 8 and the screw body 9 formed in two parts, and the Screw body 9 is in the tube 8 through in the figure thin spokes, not shown, held.
- resonator tube and screw body in one piece e.g. in Form of an extruded profile, form one Coiling of the inner walls 10 by a corresponding one oblique orientation of the slots forming the walls of one Extrusion die would be achieved.
- one one-piece design of the resonator arrangement could also the existing in Fig.
- connection of the walls with each other along axis A and the Cross section of the resonator arrangement 7 in the vicinity of the Axis A must be released because of air turbulence in this area close to the axis is small anyway and little contributes to the radiation behavior of the speaker system.
- FIG. 3 shows an enlarged detail Resonator arrangement 7 according to a further development of the Invention.
- the amount of Opening 6 of the housing a cone-like, inside the Housing 1 into tapered body 11.
- To the outside is through a flat domed cap 15 completed.
- the body 11 is in one piece with the Formed walls 10 and through this symmetrical to the axis A held. This body 11 forces the resonator tube 8 vibrating air near the opening 6 with orbits an enlarged compared to the inside of the tube 8 Diameter and thus with a with respect to the axis A increased angular momentum.
- Fig. 4 shows a perspective view of the Screw body 9 from the back, the drawn network lines only serve the three-dimensional structure of the screw body 9 or to make tapered body 11 clearer.
- a tapered body 11 'and a cap 12' each symmetrical to the corresponding in height of the opening 6 of the Housing arranged elements 11, 12 are provided.
- the resonator tube 8 also has one at its inner end to the outer end attached to the housing wall symmetrical funnel-like expansion 16.
- the dimensions of the resonator tube 8 can according to the the calculation of bass reflex boxes known rules be determined.
- the maximum diameter D1 of the tapered body 11 is approximately twice as large as that Diameter D2 of the resonator tube 8.
- the length of the cap 12 along axis A is slightly larger than that Diameter D1, and the sound exit cross-sectional area between the outer edges 13, 14 of the tapered body 11 or the resonator tube 8 are larger than the free one Cross section of the resonator tube 8 at the diameter D2.
- the screw body has 9 each with a right-handed sense of rotation.
- the direction of rotation for a single speaker acoustic properties not critical, so both right-handed and left-handed Screw body can be used.
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
Description
- Fig. 1
- einen Schnitt durch eine erfindungsgemäße Lautsprecherbox entlang der in Fig. 2 mit I-I bezeichneten Ebene;
- Fig. 2
- eine perspektivische Ansicht der Lautsprecherbox;
- Fig. 3
- einen Schnitt durch den gewendelten Gang gemäß einer zweiten Ausgestaltung der Erfindung;
- Fig. 4
- eine perspektivische Ansicht des Schraubenkörpers aus Fig. 3;
- Fig. 5
- einen Schnitt durch den gewendelten Gang gemäß einer dritten Ausgestaltung der Erfindung; und
- Fig. 6
- einen Schnitt durch den gewendelten Gang gemäß einer vierten Ausgestaltung der Erfindung.
Claims (12)
- Lautsprechersystem mit einem Gehäuse (1), einem in einer ersten Öffnung (2, 4) des Gehäuses eingefügten Lautsprecher (3, 5), und einer zweiten Öffnung (6), die mit einer Rückseite des Lautsprechers (3, 5) über einen entlang einer Achse (A) gewendelten Gang kommuniziert, dadurch gekennzeichnet, dass die zweite Öffnung (6) in Verlängerung der Achse (A) angeordnet ist.
- Lautsprechersystem nach Anspruch 1, dadurch gekennzeichnet, dass der gewendelte Gang durch ein zylindrisches Rohrstück (8) und eine Mehrzahl von in dem Rohrstück angeordneten, radial orientierten Wänden (10) gebildet ist.
- Lautsprechersystem nach Anspruch 2, dadurch gekennzeichnet, dass die Wände (10) Teil eines in das Rohrstück (8) eingefügten Schraubenkörpers (9) sind.
- Lautsprechersystem nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Wände (10) gemeinsam einen Querschnitt in Form einer geraden Linie oder eines Sterns mit n Spitzen, vorzugsweise vier Spitzen, bilden.
- Lautsprechersystem nach Anspruch 4, dadurch gekennzeichnet, dass die Drehung der Spitzen des Sterns zwischen entgegengesetzten Längsenden der Wände (10) zwischen π/n und 3π/n beträgt.
- Lautsprechersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Steigung des gewendelten Gangs größer als sein Durchmesser ist.
- Lautsprechersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der zweiten Öffnung (6) ein ins Innere des Gehäuses hinein verjüngter Körper (11) angeordnet ist.
- Lautsprechersystem nach Anspruch 7 und Anspruch 2, dadurch gekennzeichnet, dass der verjüngte Körper (11) einteilig mit den Wänden (10) ausgebildet ist.
- Lautsprechersystem nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass in Höhe des verjüngten Körpers (11) der gewendelte Gang ins Innere des Gehäuses (1) hinein verjüngt ist.
- Lautsprechersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der gewendelte Gang eine in einen Innenraum des Gehäuses (1) mündende Öffnung aufweist, und dass in der Öffnung ein zu dem Gang hin verjüngter Körper (11') angeordnet ist.
- Lautsprechersystem nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass der verjüngte Körper (11, 11') eine aerodynamisch geformte Spitze (12, 12') trägt.
- Lautsprechersystem nach Anspruch 11, dadurch gekennzeichnet, dass die Länge der Spitze (12, 12') wenigstens so groß ist wie ihr Durchmesser.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030290457 EP1453347B1 (de) | 2003-02-27 | 2003-02-27 | Lautsprechersystem |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030290457 EP1453347B1 (de) | 2003-02-27 | 2003-02-27 | Lautsprechersystem |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1453347A1 true EP1453347A1 (de) | 2004-09-01 |
EP1453347B1 EP1453347B1 (de) | 2012-12-26 |
Family
ID=32748995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030290457 Expired - Lifetime EP1453347B1 (de) | 2003-02-27 | 2003-02-27 | Lautsprechersystem |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1453347B1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220210544A1 (en) * | 2019-04-23 | 2022-06-30 | Polk Audio, Llc | Loudspeaker System, Method and Apparatus For Absorbing Loudspeaker Acoustic Resonances |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4933982A (en) * | 1987-12-14 | 1990-06-12 | Pioneer Electronic Corporation | Bass reflex type speaker system duct having multiple sound paths |
JPH10108291A (ja) * | 1996-09-30 | 1998-04-24 | Masaaki Takenaka | スピーカシステムおよびその製造方法 |
JP2000078681A (ja) * | 1998-08-27 | 2000-03-14 | Sony Corp | スピーカ装置 |
JP2003032798A (ja) * | 2001-07-18 | 2003-01-31 | Mimii Denshi Kk | 耳せんのベント構造 |
-
2003
- 2003-02-27 EP EP20030290457 patent/EP1453347B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4933982A (en) * | 1987-12-14 | 1990-06-12 | Pioneer Electronic Corporation | Bass reflex type speaker system duct having multiple sound paths |
JPH10108291A (ja) * | 1996-09-30 | 1998-04-24 | Masaaki Takenaka | スピーカシステムおよびその製造方法 |
JP2000078681A (ja) * | 1998-08-27 | 2000-03-14 | Sony Corp | スピーカ装置 |
JP2003032798A (ja) * | 2001-07-18 | 2003-01-31 | Mimii Denshi Kk | 耳せんのベント構造 |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 09 31 July 1998 (1998-07-31) * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 06 22 September 2000 (2000-09-22) * |
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 05 12 May 2003 (2003-05-12) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220210544A1 (en) * | 2019-04-23 | 2022-06-30 | Polk Audio, Llc | Loudspeaker System, Method and Apparatus For Absorbing Loudspeaker Acoustic Resonances |
US12075208B2 (en) * | 2019-04-23 | 2024-08-27 | Polk Audio, Llc | Loudspeaker system, method and apparatus for absorbing loudspeaker acoustic resonances |
Also Published As
Publication number | Publication date |
---|---|
EP1453347B1 (de) | 2012-12-26 |
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