GB2281469B - Loudspeakers - Google Patents

Loudspeakers

Info

Publication number
GB2281469B
GB2281469B GB9412099A GB9412099A GB2281469B GB 2281469 B GB2281469 B GB 2281469B GB 9412099 A GB9412099 A GB 9412099A GB 9412099 A GB9412099 A GB 9412099A GB 2281469 B GB2281469 B GB 2281469B
Authority
GB
United Kingdom
Prior art keywords
loudspeakers
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 - 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.)
Filing date
Publication date
Application filed by British Broadcasting Corp filed Critical British Broadcasting Corp
Publication of GB9412099D0 publication Critical patent/GB9412099D0/en
Publication of GB2281469A publication Critical patent/GB2281469A/en
Application granted granted Critical
Publication of GB2281469B publication Critical patent/GB2281469B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
CN118057845A (en) * 2022-11-18 2024-05-21 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

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

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980616