WO1995006397A1 - Loudspeaker - Google Patents
Loudspeaker Download PDFInfo
- Publication number
- WO1995006397A1 WO1995006397A1 PCT/GB1994/001734 GB9401734W WO9506397A1 WO 1995006397 A1 WO1995006397 A1 WO 1995006397A1 GB 9401734 W GB9401734 W GB 9401734W WO 9506397 A1 WO9506397 A1 WO 9506397A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- baffle
- enclosure
- drive unit
- loudspeaker according
- loudspeaker
- Prior art date
Links
- 239000000463 material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000012505 colouration Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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
- H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
Definitions
- the invention relates to loudspeakers and more particularly to loudspeakers of the kind comprising a box ⁇ like enclosure, which may be cuboid in shape or otherwise, housing one or more loudspeaker drive units.
- Such de-coupling is desirable to prevent audible distortions due to unintended exitation of the baffle or due to unintended exitation of one drive unit, e.g. a tweeter, by another drive unit e.g. a mid/bass range drive unit, mounted on the same baffle.
- De-coupling should not, however, be such as to hinder the direct coupling of the drive units via the enclosure to the stand, shelf or floor on which the loudspeaker is supported.
- the present invention provides a loudspeaker enclosure having a baffle surrounding a drive unit, comprising means mounting the drive unit in the enclosure remote from the baffle.
- the baffle may have a drive unit, e.g. a tweeter, directly mounted thereon, with the associated mid range and/or base drive unit(s) mounted remotely from the baffle.
- the sole connection between one drive unit and the baffle is by way of resilient sealing means, e.g. a gasket.
- one of the drive units may be mounted on the rear surface of the enclosure.
- the said remotely mounted drive unit may be mounted on one or more, preferably several, pillars or columns projecting across the enclosure from its rear.
- the pillars or columns are tapered so that they have the effect of assisting in breaking up standing waves within the enclosure.
- the pillars or columns may be integral with the rear wall of the enclosure and may, for example, be moulded from a plastics material e.g. mica-filled polypropylene.
- the tweeter may be mounted in position in the enclosure by trapping it between the baffle and one or more columns or pillars so that no separate fasteners are used.
- At least one of the pillars or columns may also be used to support the baffle.
- Figure 1 is an exploded sectional side view of a loudspeaker made in accordance with the present invention
- Figure 2 is a sectional side view of the loudspeaker of Figure 1
- Figure 3 shows, to a large scale, detail A of Figure 2.
- a loudspeaker comprises an enclosure consisting of a cuboid box-like cabinet 2 closed by a baffle 7, both of which are moulded from a plastics material such as mica-filled polypropylene.
- the cabinet is formed internally with a series, e.g. four, of integral tapered pillars or columns 3 which project across the enclosure from its rear 9 and so that their free ends 12 are disposed in the vicinity of the front edge 11 of the enclosure 2.
- the tapered shape of the pillars or columns 3 is useful in tending to break-up standing waves in the enclosure.
- a low frequency drive unit 4 is mounted on the columns 3 by fasteners, e.g. screws 16 so as to be surrounded by, but spaced from, an aperture 13 in the baffle 7.
- a resilient seal 5 is interposed between the drive unit 4 and the aperture 13 in the baffle 7 so that the drive unit 4 is decoupled from the baffle.
- a resilient de-coupling seal 6 Between the respective edges 10,11 of the baffle 7 and the cabinet 2 is interposed a resilient de-coupling seal 6 so that the baffle is decoupled from the enclosure.
- a high frequency drive unit 8 is directly mounted to close an aperture 14 in the baffle 7 by means of fasteners, e.g. screws 15.
- An electronic cross-over network 1 is mounted on the rear face 9 of the enclosure.
- the arrangement described above not only produces a loudspeaker in which the main drive unit is acoustically de-coupled from the baffle but also has the advantage of easy assembly.
- the speaker components can be dropped into place, perhaps robotically. Also some testing of the loudspeaker can be carried out before the baffle is attached.
- the high frequency drive unit mounted on the front baffle ensures a rigid coupling to the stand or shelf. Also the fact that the paths for the two drive units are somewhat independent ensures ' at least one order of isolation between the high frequency and low frequency units while each is rigidly coupled to the floor.
- the isolation of the low frequency drive unit from the front baffle reduces box colouration due to acoustic radiation from the baffle board.
- the loudspeaker described above can thus be of improved performance compared to a speaker in which all of the drive units are mounted on a common baffle.
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002165327A CA2165327A1 (en) | 1993-08-20 | 1994-08-08 | Loudspeaker |
EP94923018A EP0714590B1 (en) | 1993-08-20 | 1994-08-08 | Loudspeaker |
DE69401593T DE69401593T2 (en) | 1993-08-20 | 1994-08-08 | SPEAKER |
AU72726/94A AU7272694A (en) | 1993-08-20 | 1994-08-08 | Loudspeaker |
HK97102703A HK1000991A1 (en) | 1993-08-20 | 1997-12-31 | Loudspeaker |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9317345.8 | 1993-08-20 | ||
GB939317345A GB9317345D0 (en) | 1993-08-20 | 1993-08-20 | Loudspeaker |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995006397A1 true WO1995006397A1 (en) | 1995-03-02 |
Family
ID=10740791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1994/001734 WO1995006397A1 (en) | 1993-08-20 | 1994-08-08 | Loudspeaker |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0714590B1 (en) |
CN (1) | CN1129510A (en) |
AU (1) | AU7272694A (en) |
CA (1) | CA2165327A1 (en) |
DE (1) | DE69401593T2 (en) |
DK (1) | DK0714590T3 (en) |
GB (1) | GB9317345D0 (en) |
HK (1) | HK1000991A1 (en) |
WO (1) | WO1995006397A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1081431C (en) * | 1996-04-22 | 2002-03-20 | 三星电子株式会社 | Loudspeaker system for TV set |
US6411723B1 (en) | 1998-06-22 | 2002-06-25 | Slab Technology Limited | Loudspeakers |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014078935A (en) * | 2012-09-18 | 2014-05-01 | Yamaha Corp | Speaker device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000636A1 (en) * | 1978-02-17 | 1979-09-06 | J Thaille | Acoustic pressure(or charge)regulator |
US4214645A (en) * | 1978-11-09 | 1980-07-29 | Avid Corporation | Method of and means for loudspeaker sound wave distribution |
US4365113A (en) * | 1980-01-07 | 1982-12-21 | Pioneer Electronic Corporation | Speaker unit for automotive vehicles |
DE3201455A1 (en) * | 1982-01-19 | 1983-07-28 | Sulz, Günther, 7000 Stuttgart | Loudspeaker box |
EP0220354A2 (en) * | 1985-09-02 | 1987-05-06 | "S.I.P.E. Società Italiana Prodotti Elettromeccanini" -S.p.A. | Loudspeaker combination with piezo-electric tweeter |
EP0295971A1 (en) * | 1987-04-23 | 1988-12-21 | Clément Eloise-Pillerault | High fidelity electroacoustic power transducer with a staggered diffusion system |
-
1993
- 1993-08-20 GB GB939317345A patent/GB9317345D0/en active Pending
-
1994
- 1994-08-08 EP EP94923018A patent/EP0714590B1/en not_active Expired - Lifetime
- 1994-08-08 DK DK94923018T patent/DK0714590T3/en active
- 1994-08-08 CA CA002165327A patent/CA2165327A1/en not_active Abandoned
- 1994-08-08 AU AU72726/94A patent/AU7272694A/en not_active Abandoned
- 1994-08-08 WO PCT/GB1994/001734 patent/WO1995006397A1/en active IP Right Grant
- 1994-08-08 DE DE69401593T patent/DE69401593T2/en not_active Expired - Fee Related
- 1994-08-08 CN CN 94193083 patent/CN1129510A/en active Pending
-
1997
- 1997-12-31 HK HK97102703A patent/HK1000991A1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000636A1 (en) * | 1978-02-17 | 1979-09-06 | J Thaille | Acoustic pressure(or charge)regulator |
US4214645A (en) * | 1978-11-09 | 1980-07-29 | Avid Corporation | Method of and means for loudspeaker sound wave distribution |
US4365113A (en) * | 1980-01-07 | 1982-12-21 | Pioneer Electronic Corporation | Speaker unit for automotive vehicles |
DE3201455A1 (en) * | 1982-01-19 | 1983-07-28 | Sulz, Günther, 7000 Stuttgart | Loudspeaker box |
EP0220354A2 (en) * | 1985-09-02 | 1987-05-06 | "S.I.P.E. Società Italiana Prodotti Elettromeccanini" -S.p.A. | Loudspeaker combination with piezo-electric tweeter |
EP0295971A1 (en) * | 1987-04-23 | 1988-12-21 | Clément Eloise-Pillerault | High fidelity electroacoustic power transducer with a staggered diffusion system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1081431C (en) * | 1996-04-22 | 2002-03-20 | 三星电子株式会社 | Loudspeaker system for TV set |
US6411723B1 (en) | 1998-06-22 | 2002-06-25 | Slab Technology Limited | Loudspeakers |
Also Published As
Publication number | Publication date |
---|---|
DE69401593T2 (en) | 1997-05-15 |
AU7272694A (en) | 1995-03-21 |
DK0714590T3 (en) | 1997-08-04 |
EP0714590B1 (en) | 1997-01-22 |
HK1000991A1 (en) | 1998-05-15 |
CN1129510A (en) | 1996-08-21 |
CA2165327A1 (en) | 1995-03-02 |
GB9317345D0 (en) | 1993-10-06 |
EP0714590A1 (en) | 1996-06-05 |
DE69401593D1 (en) | 1997-03-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4903300A (en) | Compact and efficient sub-woofer system and method for installation in structural partitions | |
US5025474A (en) | Speaker system with image projection screen | |
EP0188295A2 (en) | A loudspeaker unit | |
KR101631275B1 (en) | An electronic device employing a sound plate switchable between stand-type and hang-type | |
AU4887300A (en) | Projection type television receiver, and manufacturing method thereof | |
US6925188B1 (en) | Ported speaker enclosure of a portable computer | |
CA2442180A1 (en) | Asymmetrical loudspeaker enclosures with enhanced low frequency response | |
US4408678A (en) | Loudspeaker enclosure | |
US5119429A (en) | Audio installation, in particular stereophonic, for television sets with a large built-in low-frequency loudspeaker | |
US4326099A (en) | Low frequency cabinet, in particular for a triphonic audio network | |
EP0390165B1 (en) | Speaker system | |
EP0682853B1 (en) | Loudspeaker system | |
EP0714590B1 (en) | Loudspeaker | |
JPH02122796A (en) | Speaker device | |
KR20070006808A (en) | Distributed acoustic cabinet | |
US5936209A (en) | Fluid coupled subwoofer acoustic enclosure system with vent chamber | |
JPH03147498A (en) | Speaker system | |
JPH02202295A (en) | Speaker system | |
CN207022145U (en) | A kind of audio amplifier | |
KR20020079890A (en) | A vented loudspeaker enclosure with limited driver radiation | |
JPH03106298A (en) | Speaker system | |
KR0124863Y1 (en) | Speaker system | |
JPH04192795A (en) | Speaker device for television receiver | |
JP2006041917A (en) | Wall face storage unit | |
JPH11168681A (en) | Television receiver |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 94193083.1 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK ES FI GB GE HU JP KE KG KP KR KZ LK LT LU LV MD MG MN MW NL NO NZ PL PT RO RU SD SE SI SK TJ TT UA US UZ VN |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): KE MW SD AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1994923018 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2165327 Country of ref document: CA |
|
ENP | Entry into the national phase |
Ref document number: 1995 569171 Country of ref document: US Date of ref document: 19951215 Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWP | Wipo information: published in national office |
Ref document number: 1994923018 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1994923018 Country of ref document: EP |