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GB2248997B - Sound output device - Google Patents
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GB2248997B - Sound output device - Google Patents

Sound output device

Info

Publication number
GB2248997B
GB2248997B GB9111775A GB9111775A GB2248997B GB 2248997 B GB2248997 B GB 2248997B GB 9111775 A GB9111775 A GB 9111775A GB 9111775 A GB9111775 A GB 9111775A GB 2248997 B GB2248997 B GB 2248997B
Authority
GB
United Kingdom
Prior art keywords
output device
sound output
sound
output
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
GB9111775A
Other versions
GB2248997A (en
GB9111775D0 (en
Inventor
Hiro Negishi
Michael David Graham Jewitt
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.)
Canon Technology Europe Ltd
Original Assignee
Canon Research Centre Europe Ltd
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 Canon Research Centre Europe Ltd filed Critical Canon Research Centre Europe Ltd
Publication of GB9111775D0 publication Critical patent/GB9111775D0/en
Priority to AU87239/91A priority Critical patent/AU8723991A/en
Priority to PCT/GB1991/001806 priority patent/WO1992007449A1/en
Priority to EP91918127A priority patent/EP0577601A1/en
Priority to JP51650291A priority patent/JP3426598B2/en
Priority to US08/030,241 priority patent/US5418336A/en
Publication of GB2248997A publication Critical patent/GB2248997A/en
Application granted granted Critical
Publication of GB2248997B publication Critical patent/GB2248997B/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; ELECTRIC HEARING AIDS; 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
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers

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)
GB9111775A 1990-10-17 1991-05-31 Sound output device Expired - Fee Related GB2248997B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU87239/91A AU8723991A (en) 1990-10-17 1991-10-16 Sound output device
PCT/GB1991/001806 WO1992007449A1 (en) 1990-10-17 1991-10-16 Sound output device
EP91918127A EP0577601A1 (en) 1990-10-17 1991-10-16 Sound output device
JP51650291A JP3426598B2 (en) 1990-10-17 1991-10-16 Sound output device
US08/030,241 US5418336A (en) 1990-10-17 1991-10-16 Sound output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9022553A GB2248996A (en) 1990-10-17 1990-10-17 Speaker assembly

Publications (3)

Publication Number Publication Date
GB9111775D0 GB9111775D0 (en) 1991-07-24
GB2248997A GB2248997A (en) 1992-04-22
GB2248997B true GB2248997B (en) 1995-03-01

Family

ID=10683871

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9022553A Withdrawn GB2248996A (en) 1990-10-17 1990-10-17 Speaker assembly
GB9111775A Expired - Fee Related GB2248997B (en) 1990-10-17 1991-05-31 Sound output device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9022553A Withdrawn GB2248996A (en) 1990-10-17 1990-10-17 Speaker assembly

Country Status (1)

Country Link
GB (2) GB2248996A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418336A (en) * 1990-10-17 1995-05-23 Canon Research Centre Europe Ltd. Sound output device
GB2273847A (en) * 1992-12-22 1994-06-29 Canon Res Ct Europe Ltd Loudspeaker having acoustic mirror.
GB2322727A (en) * 1997-02-27 1998-09-02 Fulleon Ltd Sounder device
US6068080A (en) * 1998-04-13 2000-05-30 Lacarrubba; Emanuel Apparatus for the redistribution of acoustic energy
EP1946605A1 (en) 2005-09-13 2008-07-23 Mike Thomas Aps Wave guide unit

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB375598A (en) * 1930-08-14 1932-06-30 Radio Electr Soc Fr Improvements in and relating to loud speakers and like apparatus
GB623205A (en) * 1943-06-07 1949-05-13 Standard Telephones Cables Ltd Improvements in or relating to loudspeakers
US2956636A (en) * 1956-06-11 1960-10-18 Sipko L Boersma Loudspeaker
GB2007461A (en) * 1977-09-06 1979-05-16 Selmin Sas Method and devices for the omnidirectional radiation of sound waves
GB2056815A (en) * 1979-06-30 1981-03-18 Pioneer Electronic Corp Coaxial multi-way planar diaphragm loudspeaker system
EP0095876A2 (en) * 1982-06-01 1983-12-07 Harman International Industries, Incorporated Multi-driver-loudspeaker
GB2139040A (en) * 1983-04-25 1984-10-31 Tannoy Ltd Moving coil loudspeakers
GB2188811A (en) * 1986-04-01 1987-10-07 Canon Kk Sound output system
EP0320270A2 (en) * 1987-12-09 1989-06-14 Canon Kabushiki Kaisha Stereophonic sound output system with controlled directivity
US4907671A (en) * 1988-04-08 1990-03-13 Unique Musical Products, Inc. Wide dispersion reflector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB744167A (en) * 1952-11-19 1956-02-01 Tannoy Ltd Improvements relating to loudspeakers
GB2120101B (en) * 1982-05-21 1985-07-31 Kellie And Son Limited Robert Knee joint
GB2184323A (en) * 1985-12-12 1987-06-17 Midlen Trading Corp Loudspeaker system
ES1008181Y (en) * 1988-11-07 1989-09-01 Gadea Veses Javier ACOUSTIC BOX FOR SOUND TRANSDUCTION.

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB375598A (en) * 1930-08-14 1932-06-30 Radio Electr Soc Fr Improvements in and relating to loud speakers and like apparatus
GB623205A (en) * 1943-06-07 1949-05-13 Standard Telephones Cables Ltd Improvements in or relating to loudspeakers
US2956636A (en) * 1956-06-11 1960-10-18 Sipko L Boersma Loudspeaker
GB2007461A (en) * 1977-09-06 1979-05-16 Selmin Sas Method and devices for the omnidirectional radiation of sound waves
GB2056815A (en) * 1979-06-30 1981-03-18 Pioneer Electronic Corp Coaxial multi-way planar diaphragm loudspeaker system
EP0095876A2 (en) * 1982-06-01 1983-12-07 Harman International Industries, Incorporated Multi-driver-loudspeaker
GB2139040A (en) * 1983-04-25 1984-10-31 Tannoy Ltd Moving coil loudspeakers
GB2188811A (en) * 1986-04-01 1987-10-07 Canon Kk Sound output system
EP0320270A2 (en) * 1987-12-09 1989-06-14 Canon Kabushiki Kaisha Stereophonic sound output system with controlled directivity
US4907671A (en) * 1988-04-08 1990-03-13 Unique Musical Products, Inc. Wide dispersion reflector

Also Published As

Publication number Publication date
GB2248996A (en) 1992-04-22
GB9022553D0 (en) 1990-11-28
GB2248997A (en) 1992-04-22
GB9111775D0 (en) 1991-07-24

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090531