GB337264A - Improvements relating to acoustic instruments - Google Patents

Improvements relating to acoustic instruments

Info

Publication number
GB337264A
GB337264A GB3829829A GB3829829A GB337264A GB 337264 A GB337264 A GB 337264A GB 3829829 A GB3829829 A GB 3829829A GB 3829829 A GB3829829 A GB 3829829A GB 337264 A GB337264 A GB 337264A
Authority
GB
United Kingdom
Prior art keywords
baffles
diaphragm
casing
outlet
case
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
GB3829829A
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.)
CELESTION Ltd
Original Assignee
CELESTION 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 CELESTION Ltd filed Critical CELESTION Ltd
Priority to GB3829829A priority Critical patent/GB337264A/en
Publication of GB337264A publication Critical patent/GB337264A/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
    • H04R1/22—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
    • H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
    • H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers

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)

Abstract

337,264. Celestion, Ltd., and French, C. Dec. 13, 1929. Loud-speakers.-In order to provide a relatively long path for the sound waves emitted from the inner surface of the diaphragm b of a loudspeaker or like sound-reproducing instrument before they can impinge on the outer. surface, the casing c is fitted internally with one or more baffles c<1>, d<1>, Fig. 3, preferably projecting alternately from the front c<2> and back d so as to provide a tortuous path between the diaphragm and an outlet e. The casing may either be circular, in which case the baffles c<1>, d<1> are constituted by concentric cylindrical elements, or it may be rectangular, in which case parallel plane baffles are employed. In a modified construction the baffles are inclined so that a divergent passage of continuously increasing cross-sectional area is furnished. In a further modification, Fig. 5, the diaphragm b is located near the upper portion of the casing c, the outlet e is near the base at the front, and the baffles c', d' are of curved formation.
GB3829829A 1929-12-13 1929-12-13 Improvements relating to acoustic instruments Expired GB337264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3829829A GB337264A (en) 1929-12-13 1929-12-13 Improvements relating to acoustic instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3829829A GB337264A (en) 1929-12-13 1929-12-13 Improvements relating to acoustic instruments

Publications (1)

Publication Number Publication Date
GB337264A true GB337264A (en) 1930-10-30

Family

ID=10402537

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3829829A Expired GB337264A (en) 1929-12-13 1929-12-13 Improvements relating to acoustic instruments

Country Status (1)

Country Link
GB (1) GB337264A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646852A (en) * 1949-04-21 1953-07-28 Forrester John Loud-speaker cabinet
US2822883A (en) * 1954-05-07 1958-02-11 Roy F Allison Device for use in reproducing sounds
US2866513A (en) * 1952-11-24 1958-12-30 Edward V Bracken Apparatus for generating sound
US3523589A (en) * 1969-07-22 1970-08-11 John Virva High-compliance speaker and enclosure combination
US4168761A (en) * 1976-09-03 1979-09-25 George Pappanikolaou Symmetrical air friction enclosure for speakers
US4173266A (en) * 1978-11-24 1979-11-06 Pizer Robert S Loudspeaker enclosure
US4213515A (en) * 1977-09-15 1980-07-22 Novanex Automation N.V. Speaker system
US4942939A (en) * 1989-05-18 1990-07-24 Harrison Stanley N Speaker system with folded audio transmission passage
GB2310104A (en) * 1996-02-12 1997-08-13 Yang Yi Fu Loud speaker enclosure and tunable audio reproduction apparatus
FR2770734A1 (en) * 1997-10-31 1999-05-07 Thomson Television Angers Sa Acoustic enclosure for mounting loudspeaker
GB2333927A (en) * 1998-01-30 1999-08-04 Sony Corp Housing for an electro-acoustic transducer, e.g. loudspeaker, earphone, microphone
GB2395616B (en) * 2002-03-29 2005-07-06 Teruo Tsutsumi Loudspeaker apparatus
WO2005104607A1 (en) * 2004-04-20 2005-11-03 Loewe Opta Gmbh Bass reflex tube for loudspeakers
DE102012109002A1 (en) * 2012-09-24 2014-06-12 Kienle Orgeln GmbH Resonator sound radiation system for use as e.g. electromagnetic membrane speaker in audio meeting, has radiation devices comprising lengths that enable radiation in frequency groups, where each group is assigned to devices

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646852A (en) * 1949-04-21 1953-07-28 Forrester John Loud-speaker cabinet
US2866513A (en) * 1952-11-24 1958-12-30 Edward V Bracken Apparatus for generating sound
US2822883A (en) * 1954-05-07 1958-02-11 Roy F Allison Device for use in reproducing sounds
US3523589A (en) * 1969-07-22 1970-08-11 John Virva High-compliance speaker and enclosure combination
US4168761A (en) * 1976-09-03 1979-09-25 George Pappanikolaou Symmetrical air friction enclosure for speakers
US4213515A (en) * 1977-09-15 1980-07-22 Novanex Automation N.V. Speaker system
US4173266A (en) * 1978-11-24 1979-11-06 Pizer Robert S Loudspeaker enclosure
US4942939A (en) * 1989-05-18 1990-07-24 Harrison Stanley N Speaker system with folded audio transmission passage
GB2310104A (en) * 1996-02-12 1997-08-13 Yang Yi Fu Loud speaker enclosure and tunable audio reproduction apparatus
FR2770734A1 (en) * 1997-10-31 1999-05-07 Thomson Television Angers Sa Acoustic enclosure for mounting loudspeaker
GB2333927A (en) * 1998-01-30 1999-08-04 Sony Corp Housing for an electro-acoustic transducer, e.g. loudspeaker, earphone, microphone
GB2333927B (en) * 1998-01-30 2000-03-29 Sony Corp Electro-acoustic transducer
US6356643B2 (en) 1998-01-30 2002-03-12 Sony Corporation Electro-acoustic transducer
GB2395616B (en) * 2002-03-29 2005-07-06 Teruo Tsutsumi Loudspeaker apparatus
WO2005104607A1 (en) * 2004-04-20 2005-11-03 Loewe Opta Gmbh Bass reflex tube for loudspeakers
DE102012109002A1 (en) * 2012-09-24 2014-06-12 Kienle Orgeln GmbH Resonator sound radiation system for use as e.g. electromagnetic membrane speaker in audio meeting, has radiation devices comprising lengths that enable radiation in frequency groups, where each group is assigned to devices
DE102012109002B4 (en) * 2012-09-24 2017-11-02 Kienle Orgeln GmbH Resonator sound radiation system

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