GB2281469B - Loudspeakers - Google Patents

Loudspeakers

Info

Publication number: GB2281469B
Authority: GB; United Kingdom
Prior art keywords: loudspeakers
Prior art date: 1993-08-27
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 - Fee Related

Application number

GB9412099A

Other versions

GB9412099D0 (en

GB2281469A (en

Inventor

Graham Whitehead

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

British Broadcasting Corp

Original Assignee

British Broadcasting Corp

Priority date (The priority date 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 date listed.)

1993-08-27

Filing date

1994-06-16

Publication date

1997-04-23

1994-06-16 Application filed by British Broadcasting Corp filed Critical British Broadcasting Corp

1994-08-03 Publication of GB9412099D0 publication Critical patent/GB9412099D0/en

1995-03-01 Publication of GB2281469A publication Critical patent/GB2281469A/en

1997-04-23 Application granted granted Critical

1997-04-23 Publication of GB2281469B publication Critical patent/GB2281469B/en

2014-06-16 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

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
- 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)
Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

GB9412099A 1993-08-27 1994-06-16 Loudspeakers Expired - Fee Related GB2281469B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB939317850A GB9317850D0 (en)	1993-08-27	1993-08-27	Loudspeakers

Publications (3)

Publication Number	Publication Date
GB9412099D0 GB9412099D0 (en)	1994-08-03
GB2281469A GB2281469A (en)	1995-03-01
GB2281469B true GB2281469B (en)	1997-04-23

Family

ID=10741137

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
GB939317850A Pending GB9317850D0 (en)	1993-08-27	1993-08-27	Loudspeakers
GB9412099A Expired - Fee Related GB2281469B (en)	1993-08-27	1994-06-16	Loudspeakers

Family Applications Before (1)

Application Number	Title	Priority Date	Filing Date
GB939317850A Pending GB9317850D0 (en)	1993-08-27	1993-08-27	Loudspeakers

Country Status (5)

Country	Link
EP (1)	EP0641142A1 (en)
JP (1)	JPH07154885A (en)
CN (1)	CN1108857A (en)
GB (2)	GB9317850D0 (en)
TW (1)	TW231394B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5696357A (en) *	1995-08-25	1997-12-09	Polk Investment Corporation	Bass-reflex loudspeaker
TWI850860B (en) *	2022-11-18	2024-08-01	宏碁股份有限公司	Speaker module

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3952159A (en) *	1973-03-09	1976-04-20	Zenith Radio Corporation	Ducted port reflex enclosure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4131179A (en) *	1976-12-17	1978-12-26	Pope Darrel L	High fidelity speaker system
GB2049351B (en) *	1979-04-17	1984-01-11	Leggott Sa	Loudspeaker unit
US4635748A (en) *	1986-02-18	1987-01-13	Paulson Rollie W	Speaker cabinet having interactive speakers
JPH03267899A (en) *	1990-03-16	1991-11-28	Nec Home Electron Ltd	Phase inversion type speaker
GB9207882D0 (en) *	1992-04-10	1992-05-27	Celestion Int Ltd	Loudspeakers

1993
- 1993-08-27 GB GB939317850A patent/GB9317850D0/en active Pending
- 1993-09-04 TW TW82107245A patent/TW231394B/en active
1994
- 1994-06-16 GB GB9412099A patent/GB2281469B/en not_active Expired - Fee Related
- 1994-06-16 EP EP94304380A patent/EP0641142A1/en not_active Withdrawn
- 1994-08-18 CN CN 94115423 patent/CN1108857A/en active Pending
- 1994-08-25 JP JP20093794A patent/JPH07154885A/en active Pending

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3952159A (en) *	1973-03-09	1976-04-20	Zenith Radio Corporation	Ducted port reflex enclosure

Also Published As

Publication number	Publication date
GB9412099D0 (en)	1994-08-03
CN1108857A (en)	1995-09-20
GB2281469A (en)	1995-03-01
TW231394B (en)	1994-10-01
GB9317850D0 (en)	1993-10-13
JPH07154885A (en)	1995-06-16
EP0641142A1 (en)	1995-03-01

Publication	Publication Date	Title
GB2275846B (en)	1996-05-22	Headphones
EP0613322A3 (en)	1994-11-02	Loudspeaker.
GB2261794B (en)	1995-06-07	Loudspeaker
GB9207882D0 (en)	1992-05-27	Loudspeakers
GB2278251B (en)	1997-04-02	Speaker
EP0610769A3 (en)	1994-10-12	Loudspeaker.
GB2297454B (en)	1997-11-12	Loudspeaker
GB9404585D0 (en)	1994-04-20	Loudspeaker
GB2256560B (en)	1994-11-23	Loudspeaker
EP0610001A3 (en)	1995-01-18	Loudspeaker.
HK1000991A1 (en)	1998-05-15	Loudspeaker
GB2281469B (en)	1997-04-23	Loudspeakers
GB2278974B (en)	1997-07-16	Loudspeaker antivibrator
GB2290919B (en)	1998-08-19	Loudspeakers
GB9310903D0 (en)	1993-07-14	Curved loudspeaker
GB9316908D0 (en)	1993-09-29	Loudspeakers
GB9309227D0 (en)	1993-06-16	Loudspeakers
CA71574S (en)	1992-09-22	Loudspeaker
CA70048S (en)	1992-02-07	Loudspeaker
GB9325190D0 (en)	1994-02-09	Earphone
GB9221133D0 (en)	1992-11-25	Loudspeakers
GB9200774D0 (en)	1992-03-11	Loudspeakers
GB9209345D0 (en)	1992-06-17	Loudspeakers
GB9215317D0 (en)	1992-09-02	Loudspeaker
GB9213318D0 (en)	1992-08-05	High-fidelility loudspeaker

Legal Events

Date	Code	Title	Description
1999-02-03	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 19980616