GB1462919A - A loudspeaker cabinet - Google Patents
A loudspeaker cabinetInfo
- Publication number
- GB1462919A GB1462919A GB3276474A GB3276474A GB1462919A GB 1462919 A GB1462919 A GB 1462919A GB 3276474 A GB3276474 A GB 3276474A GB 3276474 A GB3276474 A GB 3276474A GB 1462919 A GB1462919 A GB 1462919A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure chamber
- sound
- loudspeakers
- tweeter
- wall
- 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.)
- Expired
Links
- 238000005192 partition Methods 0.000 abstract 4
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 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
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
-
- 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
- H04R1/2861—Enclosures comprising vibrating or resonating arrangements using a back-loaded horn
- H04R1/2865—Enclosures comprising vibrating or resonating arrangements using a back-loaded horn for loudspeaker transducers
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)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
1462919 Loudspeakers NECKERMANN VERSAND KGAA 24 July 1974 [27 July 1973] 32764/74 Headings H4J and H4X An exponential loudspeaker cabinet has a front wall 2 (Fig. 1), a back wall 3 and an intermediate wall 7. The front wall 2 defines a first sound exit hole 6 and at least one further sound exit hole 15, 16 (Fig. 2). Subsidiary walls 11, 20, &c. (Fig. 3) between the walls 2 and 7 provide a pressure chamber 27 and a spirally extending first portion of a substantially exponential horn. The first portion extends from the pressure chamber 27 via an aperture 17 in intermediate wall 7 to a sound passage 13, 13a (Fig. 4) defined between the intermediate wall 7 and the back wall 3. One of the subsidiary walls 8 is an inclined wall which assists in forming the end of the exponential horn. Two or more loudspeakers 18, 19 have diaphragms which radiate sound into the pressure chamber from one side of the diaphragm and through the at least one further sound exit hole 15, 16 from the other side of its diaphragm. A tweeter 12 is also provided. The loudspeakers 18, 19 and the tweeter 12 occupy a volume substantially outside the free space of the exponential horn. If desired a wedge member (29), Fig. 5 (not shown) may be provided between the loudspeaker baffles 22, 23 to minimize the air in the pressure chamber 27 and to direct the sound to the acoustic exit 28. Alternatively the air volume in the pressure chamber 27 may be minimized by arranging that the loudspeaker baffles 22, 23 are in contact at one end and are inclined to form a wedge shaped pressure chamber (27), (Fig. 6) not shown. A thin partition (30) divides the pressure chamber (27) into two parts. The tweeter 12 may be in the intermediate wall 7 and situated in a region slightly offset in relation to the acoustic exit 28 (Fig. 7, not shown), so that the tweeter 12 is directed on to the back wall 3. However the tweeter may be directed forwards in the same position or may be installed in the front wall 2 (Fig. 8, not shown). If desired the loudspeakers 18, 19 (Fig. 3) may be installed in reverse manner, so that the backs of the diaphragms radiate into the pressure chamber 27 and the fronts into the sound exit holes 15, 16. If desired, a triangular labyrinth (31), Fig. 9 (not shown) may be at the end of the first horn portion, just before the sound reaches aperture 17, and compensates undesired resonance effects. The tweeter 12 may then be installed within the cabinet on the back wall 3 facing the sound exit hole 6. An alternative cabinet (Fig. 15) has loudspeakers 18, 19 radiating through holes in the front wall 2. Their rear sides operate into a pressure chamber 27 having an aperture 33 in a back partition 35. Between the back partition 35 and the intermediate wall 7, partition walls (34), Fig. 14 (not shown) define a spirally extending first horn portion and this leads, via aperture 17, to the sound passage 13, 13a is in Fig. 4. As many loudspeakers as there are sound walls may operate into the pressure chamber 27. Another embodiment has four loudspeakers housed in the cabinet and located to radiate forwardly of the cabinet through an aperture in the front wall 2. The four loudspeakers have a common diaphragm 41 and are in a common support dish 36 which acts as a pressure chamber having a central acoustic exit 38. The diaphragm 41 is provided, between the loudspeaker cones, with creases or folds and with an on-edge cross 42 (see Fig. 17, not shown), the arms of which taper at their ends. The arms of the cross 42 are of foamed plastics. Local circuit.-A panel L (Fig. 12) has sockets S and D and an earth terminal M. Matching resistors R 1 , R 2 are provided together with an input level control P 1 and a manual control P 2 . There is an"off"position for the tweeter Tw and also a volume control for it.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2338298A DE2338298C2 (en) | 1973-07-27 | 1973-07-27 | Loudspeaker enclosure with an exponential funnel and at least two loudspeakers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1462919A true GB1462919A (en) | 1977-01-26 |
Family
ID=5888198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3276474A Expired GB1462919A (en) | 1973-07-27 | 1974-07-24 | A loudspeaker cabinet |
Country Status (8)
Country | Link |
---|---|
US (1) | US3898384A (en) |
JP (1) | JPS5072621A (en) |
DE (1) | DE2338298C2 (en) |
FR (1) | FR2239069B3 (en) |
GB (1) | GB1462919A (en) |
IT (1) | IT1016712B (en) |
NL (1) | NL7408011A (en) |
SE (1) | SE7407531L (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991009507A1 (en) * | 1989-12-15 | 1991-06-27 | Andrew John Fox | Manifold loudspeaker system |
WO2019046196A1 (en) * | 2017-08-30 | 2019-03-07 | Bose Corporation | Loudspeaker with deflector at an acoustic port exit |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4213008A (en) * | 1978-11-22 | 1980-07-15 | Helffrich Edmund R | Loudspeaker enclosure for mid-wall location |
US4173266A (en) * | 1978-11-24 | 1979-11-06 | Pizer Robert S | Loudspeaker enclosure |
EP0217278A3 (en) * | 1985-09-26 | 1989-01-04 | Mario Curth | Arrangement of a bass loudspeaker with a horn |
US4733749A (en) * | 1986-02-26 | 1988-03-29 | Electro-Voice, Inc. | High output loudspeaker for low frequency reproduction |
US4923031A (en) * | 1986-02-26 | 1990-05-08 | Electro-Voice, Incorporated | High output loudspeaker system |
AU6176394A (en) * | 1993-02-25 | 1994-09-14 | Ralph D. Heinz | Multiple-driver single horn loudspeaker |
US5343535A (en) * | 1993-05-07 | 1994-08-30 | Marshall Ronald N | Loudspeaker device |
EP0999723B1 (en) | 1998-11-05 | 2006-03-08 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric speaker, method for producing the same, and speaker system including the same |
US6411718B1 (en) | 1999-04-28 | 2002-06-25 | Sound Physics Labs, Inc. | Sound reproduction employing unity summation aperture loudspeakers |
DE60208245T2 (en) * | 2001-01-22 | 2006-07-13 | Matsushita Electric Industrial Co., Ltd., Kadoma | Speaker System |
US7392880B2 (en) * | 2002-04-02 | 2008-07-01 | Gibson Guitar Corp. | Dual range horn with acoustic crossover |
US7621369B2 (en) * | 2006-06-16 | 2009-11-24 | Graber Curtis E | Acoustic energy projection system |
SG170641A1 (en) * | 2009-10-30 | 2011-05-30 | Dream Infotainment Resources Pte Ltd | Omnidirectional speaker |
KR101515618B1 (en) * | 2014-03-20 | 2015-04-28 | 김태형 | Lattice-Type Speaker, and Lattice Array Speaker System Having the Same |
GB2561341B (en) * | 2017-03-30 | 2019-04-24 | Darling Henry | A modular loudspeaker system |
CN113132580B (en) * | 2019-12-31 | 2023-06-09 | 杭州海康威视数字技术股份有限公司 | Video camera |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2754926A (en) * | 1954-11-26 | 1956-07-17 | Asa M Stackhouse | Corner horn |
AT305403B (en) * | 1970-08-18 | 1973-02-26 | Neckermann Versand Kgaa | Loudspeaker enclosure |
-
1973
- 1973-07-27 DE DE2338298A patent/DE2338298C2/en not_active Expired
-
1974
- 1974-06-07 SE SE7407531A patent/SE7407531L/xx not_active Application Discontinuation
- 1974-06-14 NL NL7408011A patent/NL7408011A/en unknown
- 1974-07-22 FR FR7425303A patent/FR2239069B3/fr not_active Expired
- 1974-07-24 GB GB3276474A patent/GB1462919A/en not_active Expired
- 1974-07-26 US US492971A patent/US3898384A/en not_active Expired - Lifetime
- 1974-07-26 IT IT69387/74A patent/IT1016712B/en active
- 1974-07-27 JP JP49085632A patent/JPS5072621A/ja active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991009507A1 (en) * | 1989-12-15 | 1991-06-27 | Andrew John Fox | Manifold loudspeaker system |
WO2019046196A1 (en) * | 2017-08-30 | 2019-03-07 | Bose Corporation | Loudspeaker with deflector at an acoustic port exit |
US10405084B2 (en) | 2017-08-30 | 2019-09-03 | Bose Corporation | Loudspeaker with deflector at a port exit |
CN111034218A (en) * | 2017-08-30 | 2020-04-17 | 伯斯有限公司 | Loudspeaker with deflector at outlet of acoustic port |
CN111034218B (en) * | 2017-08-30 | 2021-04-16 | 伯斯有限公司 | Loudspeaker with deflector at outlet of acoustic port |
Also Published As
Publication number | Publication date |
---|---|
IT1016712B (en) | 1977-06-20 |
FR2239069A1 (en) | 1975-02-21 |
JPS5072621A (en) | 1975-06-16 |
SE7407531L (en) | 1975-01-28 |
DE2338298B1 (en) | 1975-01-16 |
NL7408011A (en) | 1975-01-29 |
FR2239069B3 (en) | 1977-05-20 |
DE2338298C2 (en) | 1975-09-11 |
US3898384A (en) | 1975-08-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |