CA2165327A1 - Loudspeaker - Google Patents
LoudspeakerInfo
- Publication number
- CA2165327A1 CA2165327A1 CA002165327A CA2165327A CA2165327A1 CA 2165327 A1 CA2165327 A1 CA 2165327A1 CA 002165327 A CA002165327 A CA 002165327A CA 2165327 A CA2165327 A CA 2165327A CA 2165327 A1 CA2165327 A1 CA 2165327A1
- Authority
- CA
- Canada
- Prior art keywords
- baffle
- enclosure
- drive unit
- loudspeaker according
- 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.)
- Abandoned
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
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
A loudspeaker comprises an enclosure (2) having a baffle (7) surrounding a drive unit (4), characterised by means, e.g. columns or pillars (3) mounting the drive unit (4) in the enclosure (2) remote from the baffle (7).
Description
woss/06397 21 6 5 3 2 7 pcTlGss4lol734 TITLE: LOUDSPEARER
DESCRIPTION
TECHNICAL FIELD
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.
It is an object of the invention to provide an improved loudspeaker. More particularly it is an object of the invention to provide a loudspeaker in which its baffle, on which it is conventional to mount the drive units, is de-coupled from at least one of the 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 yia the enclosure to the stand, shelf or floor on which the loudspeaker is supported.
BACRGROUND ART
To avoid such problems it has been suggested to mount the loudspeaker tweeter in a separate enclosure, which may be physically separated from the associated enclosure housing mid range and base drive units. Such an arrangement involves additional expense in construction and is not always possible for example for considerations of 2165~7 available space.
DISCLOSURE OF lNv~NllON
Accordingly 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. Preferably the sole connection between one drive unit and the baffle is by way of resilient sealing means, e.g. a gasket.
Where the enclosure is a generally conventional cuboid box-shape, 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. Preferably the pillars or columns are tapered so that they have the effect of assisting in breaking up s~An~ing 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.
BRIEF DESCRIPTION OF DRAWINGS
woss/06397 216 5 ~ ~ 7 pcTlGBs4lol734 The invention is diagrammatically illustrated, by way of example, in the accompanying drawings in which:-Figure 1 is an exploded sectional side view of aloudspeaker made in accordance with the present invention;
Figure 2 is a sectional side view of the loudspeaker of Figure 1, and Figure 3 shows, to a large scale, detail A of Figure 2.
BEST MODE FOR CARRYING OUT THE INVENTION
In the drawings 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. 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.
W095/06397 PCT/GBg4/01734 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.
INDUSTRIAL APPLICABILITY
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. Thus with the cabinet laid on its back, 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.
Mounting the low frequency drive unit directly onto the rear baffle of the enclosure ensures good coupling to the seat of the cabinet i.e. a stand or shelf, which is helpful in the extraction of the full dynamics of the speaker.
Mounting the high frequency drive unit 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.
With or without a high frequency drive unit, the isolation of the low frequency drive unit from the front baffle reduces box colouration due to acoustic radiation from the baffle board.
WO 95/06397 2 ~ 6 5 ~ 2 7 PCT/GB94/01734 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.
DESCRIPTION
TECHNICAL FIELD
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.
It is an object of the invention to provide an improved loudspeaker. More particularly it is an object of the invention to provide a loudspeaker in which its baffle, on which it is conventional to mount the drive units, is de-coupled from at least one of the 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 yia the enclosure to the stand, shelf or floor on which the loudspeaker is supported.
BACRGROUND ART
To avoid such problems it has been suggested to mount the loudspeaker tweeter in a separate enclosure, which may be physically separated from the associated enclosure housing mid range and base drive units. Such an arrangement involves additional expense in construction and is not always possible for example for considerations of 2165~7 available space.
DISCLOSURE OF lNv~NllON
Accordingly 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. Preferably the sole connection between one drive unit and the baffle is by way of resilient sealing means, e.g. a gasket.
Where the enclosure is a generally conventional cuboid box-shape, 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. Preferably the pillars or columns are tapered so that they have the effect of assisting in breaking up s~An~ing 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.
BRIEF DESCRIPTION OF DRAWINGS
woss/06397 216 5 ~ ~ 7 pcTlGBs4lol734 The invention is diagrammatically illustrated, by way of example, in the accompanying drawings in which:-Figure 1 is an exploded sectional side view of aloudspeaker made in accordance with the present invention;
Figure 2 is a sectional side view of the loudspeaker of Figure 1, and Figure 3 shows, to a large scale, detail A of Figure 2.
BEST MODE FOR CARRYING OUT THE INVENTION
In the drawings 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. 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.
W095/06397 PCT/GBg4/01734 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.
INDUSTRIAL APPLICABILITY
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. Thus with the cabinet laid on its back, 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.
Mounting the low frequency drive unit directly onto the rear baffle of the enclosure ensures good coupling to the seat of the cabinet i.e. a stand or shelf, which is helpful in the extraction of the full dynamics of the speaker.
Mounting the high frequency drive unit 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.
With or without a high frequency drive unit, the isolation of the low frequency drive unit from the front baffle reduces box colouration due to acoustic radiation from the baffle board.
WO 95/06397 2 ~ 6 5 ~ 2 7 PCT/GB94/01734 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.
Claims (11)
1. A loudspeaker comprising an enclosure (2) having a baffle (7) surrounding a drive unit (4) characterised by means (6) decoupling the baffle from the enclosure and by means (3) mounting the drive unit (4) in the enclosure (2) remote from the baffle (7) such that the drive unit (4) is decoupled from the baffle (7).
2. A loudspeaker according to claim 1, characterised in that the drive unit (4) is a mid range and/or low frequency drive unit and by a high frequency drive unit (8) directly mounted on the baffle (7).
3. A loudspeaker according to claim 1 or claim 2, characterised by resilient sealing means (5) which seals the drive unit to the baffle while maintaining one decoupled from the other.
4. A loudspeaker according to any preceding claim, characterised in that the enclosure (2) is of box-shape, in that the baffle (7) forms the front of the enclosure, in that the enclosure has a rear (9) opposing the front and in that the drive unit (4) is mounted on the rear (9) of the enclosure.
5. A loudspeaker according to claim 4, characterised in that the drive unit (4) is mounted on at least one pillar or column (3) projecting across the enclosure from its rear (9).
6. A loudspeaker according to claim 6, characterised in that the or each pillar or column (3) is tapered along its length.
7. A loudspeaker according to claim 5 or claim 6, characterised in that the or each pillar or column (3) is integral with the rear (9) of the enclosure (2).
8. A loudspeaker according to any one of claims 2 to 7, characterised in that the high frequency drive unit (8) is mounted in position in the enclosure by entrapment between the baffle (7) and one or more columns or pillars (3).
9. A loudspeaker according to any preceding claim, characterised in that the baffle (7) is supported by one or more pillars or columns (3).
10. A loudspeaker according to any preceding claim, characterised in that the baffle (7) is sealed to, and decoupled from, the enclosure (2) at their respective edges (10,11) by a resilient seal (6).
11. A loudspeaker according to any preceding claim, characterised in that the enclosure (2) and/or the baffle (7) are moulded from a plastics material.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9317345.8 | 1993-08-20 | ||
| GB939317345A GB9317345D0 (en) | 1993-08-20 | 1993-08-20 | Loudspeaker |
| PCT/GB1994/001734 WO1995006397A1 (en) | 1993-08-20 | 1994-08-08 | Loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2165327A1 true CA2165327A1 (en) | 1995-03-02 |
Family
ID=10740791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002165327A Abandoned CA2165327A1 (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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5822443A (en) * | 1996-04-22 | 1998-10-13 | Samsung Electronics Co., Ltd. | Speaker system for a television |
| AU756783B2 (en) | 1998-06-22 | 2003-01-23 | Slab Technology Limited | Loudspeakers |
| JP2014078935A (en) * | 2012-09-18 | 2014-05-01 | Yamaha Corp | Speaker device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2417909A1 (en) * | 1978-02-17 | 1979-09-14 | Thaille Jean Louis | ACOUSTIC PRESSURE (OR CHARGE) REGULATOR |
| US4214645A (en) * | 1978-11-09 | 1980-07-29 | Avid Corporation | Method of and means for loudspeaker sound wave distribution |
| JPS5910867Y2 (en) * | 1980-01-07 | 1984-04-04 | パイオニア株式会社 | Car speaker unit |
| DE3201455C2 (en) * | 1982-01-19 | 1985-09-19 | Dieter 7447 Aichtal Wagner | Speaker box |
| IT1187062B (en) * | 1985-09-02 | 1987-12-16 | S I P E Soc Italiana Prodotti | MULTIPLE SPEAKER, WITH PIEZOELECTRIC "TWEETER" SUPPORTED WITH MEANS THAT ALLOW THE EXPLOITATION OF THE MEMBRANE OF THE MAIN SPEAKER AS THE REFLECTIVE SURFACE OF THE RADIATION EMITTED REAR FROM THE CERAMIC DISC AND THE "TWE" MEMBRET |
| FR2609853B1 (en) * | 1987-04-23 | 1989-04-21 | Pillerault Clement Eloise | HIGH FIDELITY ELECTROACOUSTIC POWER TRANSDUCER WITH STAGE DIFFUSION SYSTEM |
-
1993
- 1993-08-20 GB GB939317345A patent/GB9317345D0/en active Pending
-
1994
- 1994-08-08 WO PCT/GB1994/001734 patent/WO1995006397A1/en active IP Right Grant
- 1994-08-08 DK DK94923018T patent/DK0714590T3/en active
- 1994-08-08 EP EP94923018A patent/EP0714590B1/en not_active Expired - Lifetime
- 1994-08-08 DE DE69401593T patent/DE69401593T2/en not_active Expired - Fee Related
- 1994-08-08 AU AU72726/94A patent/AU7272694A/en not_active Abandoned
- 1994-08-08 CA CA002165327A patent/CA2165327A1/en not_active Abandoned
- 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
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995006397A1 (en) | 1995-03-02 |
| HK1000991A1 (en) | 1998-05-15 |
| DE69401593T2 (en) | 1997-05-15 |
| EP0714590B1 (en) | 1997-01-22 |
| EP0714590A1 (en) | 1996-06-05 |
| CN1129510A (en) | 1996-08-21 |
| DK0714590T3 (en) | 1997-08-04 |
| DE69401593D1 (en) | 1997-03-06 |
| GB9317345D0 (en) | 1993-10-06 |
| AU7272694A (en) | 1995-03-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |