GB744167A - Improvements relating to loudspeakers - Google Patents

Improvements relating to loudspeakers

Info

Publication number
GB744167A
GB744167A GB29256/52A GB2925652A GB744167A GB 744167 A GB744167 A GB 744167A GB 29256/52 A GB29256/52 A GB 29256/52A GB 2925652 A GB2925652 A GB 2925652A GB 744167 A GB744167 A GB 744167A
Authority
GB
United Kingdom
Prior art keywords
sections
loud
sound
lengths
power unit
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
GB29256/52A
Inventor
Guy Rupert Fountain
Terence Brian Livingstone
Ronald Hastings Rackham
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.)
Tannoy Ltd
Original Assignee
Tannoy 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 Tannoy Ltd filed Critical Tannoy Ltd
Priority to GB29256/52A priority Critical patent/GB744167A/en
Priority to US392368A priority patent/US2820525A/en
Publication of GB744167A publication Critical patent/GB744167A/en
Expired 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
    • H04R1/32—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)

Abstract

744,167. Loud-speakers. TANNOY, Ltd. Nov. 11, 1953 [Nov. 19, 1952], No. 29256/52. Class 40 (4). [Also in Group XXXVIII] In a horn-type loud-speaker the mouth lies on the surface of a right cylinder having a vertical axis, and is divided into axial sections 6, 12 and 20, each communicating with the corresponding one of the coaxial throats 3, 4 and 5 extending along the axis from a sound power unit 1, the throats being so designed that the sound waves emerging from the different sections are substantially of equal amplitude and in phase, so that the loudspeaker radiates sound mainly in a horizontal plane. As shown, the path lengths from the sound power unit 1 to the sections of the mouth nearer to that unit are increased by providing baffles such as 13, 21 so as to make the lengths of the paths to all sections equal. Two loud-speakers each constructed as shown may be arranged adjacent to, and coaxially with, each other to form a loud-speaker assembly, which is supported on the trunnions 35 in a U-shaped frame 36 so that the upper loud-speaker may readily be swung into the lower position for ease of access to its sound power unit for maintenance purposes. Instead of making the path lengths to the sections equal, it may be arranged that the paths are of such lengths that the phase difference between adjacent sections is constant, in which case the loudspeaker will emit sound mainly between the surfaces of two cones coaxial with the cylinder.
GB29256/52A 1952-11-19 1952-11-19 Improvements relating to loudspeakers Expired GB744167A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB29256/52A GB744167A (en) 1952-11-19 1952-11-19 Improvements relating to loudspeakers
US392368A US2820525A (en) 1952-11-19 1953-11-16 Annular diffusion loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29256/52A GB744167A (en) 1952-11-19 1952-11-19 Improvements relating to loudspeakers

Publications (1)

Publication Number Publication Date
GB744167A true GB744167A (en) 1956-02-01

Family

ID=10288620

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29256/52A Expired GB744167A (en) 1952-11-19 1952-11-19 Improvements relating to loudspeakers

Country Status (2)

Country Link
US (1) US2820525A (en)
GB (1) GB744167A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248996A (en) * 1990-10-17 1992-04-22 Canon Res Ct Europe Ltd Speaker assembly
US5418336A (en) * 1990-10-17 1995-05-23 Canon Research Centre Europe Ltd. Sound output device
GB2341742A (en) * 1998-09-21 2000-03-22 Blast Loudspeakers Limited An acoustic absorber or emitter

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027964A (en) * 1958-06-24 1962-04-03 Ampex Loudspeaker
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
US4348549A (en) * 1978-02-06 1982-09-07 Emmanuel Berlant Loudspeaker system
US4908601A (en) * 1987-07-27 1990-03-13 Whelen Technologies, Inc. Loud speaker with horizontal radiation pattern
US5115882A (en) * 1989-03-29 1992-05-26 Woody D Grier Omnidirectional dispersion system for multiway loudspeakers
KR20050010759A (en) * 2002-03-05 2005-01-28 오디오 프로덕츠 인터내쇼날 코포레이션 Loudspeaker with shaped sound field

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1486650A (en) * 1924-03-11 Horn for sound instruments
US962574A (en) * 1907-02-26 1910-06-28 American Callaphone Company Sound-horn.
DE372136C (en) * 1921-05-19 1923-03-20 Otto Scheller Sound conductor with several individual funnels
US2037187A (en) * 1933-03-28 1936-04-14 Bell Telephone Labor Inc Sound translating device
US2127110A (en) * 1936-08-03 1938-08-16 United Res Corp Acoustic device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248996A (en) * 1990-10-17 1992-04-22 Canon Res Ct Europe Ltd Speaker assembly
US5418336A (en) * 1990-10-17 1995-05-23 Canon Research Centre Europe Ltd. Sound output device
GB2341742A (en) * 1998-09-21 2000-03-22 Blast Loudspeakers Limited An acoustic absorber or emitter
GB2341742B (en) * 1998-09-21 2003-04-23 Blast Loudspeakers Ltd Acoustic absorber and emitter

Also Published As

Publication number Publication date
US2820525A (en) 1958-01-21

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