GB978781A - Improvements in or relating to sound reproducing apparatus - Google Patents

Improvements in or relating to sound reproducing apparatus

Info

Publication number
GB978781A
GB978781A GB1352861A GB1352861A GB978781A GB 978781 A GB978781 A GB 978781A GB 1352861 A GB1352861 A GB 1352861A GB 1352861 A GB1352861 A GB 1352861A GB 978781 A GB978781 A GB 978781A
Authority
GB
United Kingdom
Prior art keywords
loud
uncovered
area
speaker
relating
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
Application number
GB1352861A
Inventor
Francis Hugh Brittain
Dennis Humphriss
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1352861A priority Critical patent/GB978781A/en
Publication of GB978781A publication Critical patent/GB978781A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • H04N5/642—Disposition of sound reproducers
    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

978,781. Loud - speakers. GENERAL ELECTRIC CO. Ltd. March 30, 1962 [April 14, 1961], No. 13528/61. Heading H4J. A cabinet or baffle 1 covers a segment comprising approximately half of the area bounded by the periphery of a generally circular or elliptical loud-speaker diaphragm, leaving the remainder of this area uncovered, so that a diffraction effect at the edge 8 defining the boundary between the covered and uncovered parts of the area produces a greater spread of sound towards the covered side of the loud-speaker than would be produced if the whole diaphragm were uncovered. Applications include a television receiver as shown, a stereophonic system, Figs. 3-5 (not shown), and a line-source public address system, Figs. 6 and 7 (not shown).
GB1352861A 1961-04-14 1961-04-14 Improvements in or relating to sound reproducing apparatus Expired GB978781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1352861A GB978781A (en) 1961-04-14 1961-04-14 Improvements in or relating to sound reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1352861A GB978781A (en) 1961-04-14 1961-04-14 Improvements in or relating to sound reproducing apparatus

Publications (1)

Publication Number Publication Date
GB978781A true GB978781A (en) 1964-12-23

Family

ID=10024616

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1352861A Expired GB978781A (en) 1961-04-14 1961-04-14 Improvements in or relating to sound reproducing apparatus

Country Status (1)

Country Link
GB (1) GB978781A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980829A (en) * 1973-06-05 1976-09-14 Harold Norman Beveridge Wide angle cylindrical wave loudspeaker extending approximately from floor to ceiling height with a lens
US4445227A (en) * 1981-12-28 1984-04-24 Magnavox Consumer Electronics Company Loudspeaker having improved directional characteristics
EP0323110A2 (en) * 1987-12-21 1989-07-05 Matsushita Electric Industrial Co., Ltd. Projection screen device
US5642429A (en) * 1995-04-28 1997-06-24 Janssen; Craig N. Sound reproduction system having enhanced low frequency directional control characteristics
GB2464512A (en) * 2008-10-16 2010-04-21 Instigate Media Ltd Directionality of a planar ribbon loudspeaker diaphragm

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980829A (en) * 1973-06-05 1976-09-14 Harold Norman Beveridge Wide angle cylindrical wave loudspeaker extending approximately from floor to ceiling height with a lens
US4445227A (en) * 1981-12-28 1984-04-24 Magnavox Consumer Electronics Company Loudspeaker having improved directional characteristics
EP0323110A2 (en) * 1987-12-21 1989-07-05 Matsushita Electric Industrial Co., Ltd. Projection screen device
EP0323110A3 (en) * 1987-12-21 1989-10-25 Matsushita Electric Industrial Co., Ltd. Projection screen device
US4998283A (en) * 1987-12-21 1991-03-05 Matsushita Electric Industrial Co., Ltd. Screen device
US5642429A (en) * 1995-04-28 1997-06-24 Janssen; Craig N. Sound reproduction system having enhanced low frequency directional control characteristics
GB2464512A (en) * 2008-10-16 2010-04-21 Instigate Media Ltd Directionality of a planar ribbon loudspeaker diaphragm
GB2464512B (en) * 2008-10-16 2012-11-28 Instigate Media Ltd A sound source

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