GB656732A - Improvements in or relating to loud speakers - Google Patents

Improvements in or relating to loud speakers

Info

Publication number
GB656732A
GB656732A GB10079/48A GB1007948A GB656732A GB 656732 A GB656732 A GB 656732A GB 10079/48 A GB10079/48 A GB 10079/48A GB 1007948 A GB1007948 A GB 1007948A GB 656732 A GB656732 A GB 656732A
Authority
GB
United Kingdom
Prior art keywords
loud
speaker
relating
casing
loud speakers
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
GB10079/48A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB10079/48A priority Critical patent/GB656732A/en
Priority to US92279A priority patent/US2646852A/en
Publication of GB656732A publication Critical patent/GB656732A/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

Abstract

656,732. Loud-speakers. FORRESTER, J. April 21, 1949, No. 10079/48. [Class 40 (iv)] The sound from the back of a loud-speaker 4 passes through a labyrinth of compartments 5 progressively increasing in cross-section. The loud-speaker may be mounted in the centre, at a corner or at the middle of one side of a rectangular casing, or the casing may be circular. Ports 8 may be provided in the compartment nearest the speaker to give access to the front of the casing.
GB10079/48A 1949-04-21 1949-04-21 Improvements in or relating to loud speakers Expired GB656732A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB10079/48A GB656732A (en) 1949-04-21 1949-04-21 Improvements in or relating to loud speakers
US92279A US2646852A (en) 1949-04-21 1949-05-10 Loud-speaker cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10079/48A GB656732A (en) 1949-04-21 1949-04-21 Improvements in or relating to loud speakers

Publications (1)

Publication Number Publication Date
GB656732A true GB656732A (en) 1951-08-29

Family

ID=9961062

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10079/48A Expired GB656732A (en) 1949-04-21 1949-04-21 Improvements in or relating to loud speakers

Country Status (2)

Country Link
US (1) US2646852A (en)
GB (1) GB656732A (en)

Cited By (6)

* 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
US2787332A (en) * 1952-09-06 1957-04-02 Norman C Fulmer Loud-speaker system
FR2653630A1 (en) * 1989-10-23 1991-04-26 Scotto Di Carlo Gilles Acoustic enclosure structure
GB2310104A (en) * 1996-02-12 1997-08-13 Yang Yi Fu Loud speaker enclosure and tunable audio reproduction apparatus
GB2333927A (en) * 1998-01-30 1999-08-04 Sony Corp Housing for an electro-acoustic transducer, e.g. loudspeaker, earphone, microphone
GB2365250A (en) * 2000-07-21 2002-02-13 B & W Loudspeakers Acoustic structures for loudspeakers

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2871971A (en) * 1954-04-28 1959-02-03 Robert J Beecroft Sound-propagating device
US2812033A (en) * 1954-06-04 1957-11-05 Young James Peter Acoustic baffle
US3007133A (en) * 1956-01-12 1961-10-31 Jr Louis R Padberg Uni-directional high level low frequency sound source
US4235301A (en) * 1979-06-04 1980-11-25 Mitchell Robert W Folded column speaker enclosure
US4628528A (en) * 1982-09-29 1986-12-09 Bose Corporation Pressure wave transducing
US4924962A (en) * 1986-07-11 1990-05-15 Matsushita Electric Industrial Co., Ltd. Sound reproducing apparatus for use in vehicle
US4750585A (en) * 1987-06-03 1988-06-14 Collings Boyd E Loudspeaker enclosure for suppressing unwanted audio waves
US4903300A (en) * 1989-01-05 1990-02-20 Polk Investment Corporation Compact and efficient sub-woofer system and method for installation in structural partitions
US4942939A (en) * 1989-05-18 1990-07-24 Harrison Stanley N Speaker system with folded audio transmission passage
GB2380091B (en) * 2001-09-21 2005-03-30 B & W Loudspeakers Loudspeaker system
US7207413B2 (en) * 2003-06-02 2007-04-24 Tbi Audio Systems Llc Closed loop embedded audio transmission line technology for loudspeaker enclosures and systems
US20080169150A1 (en) * 2007-01-12 2008-07-17 Tsung-Cheng Kuo Reflection-type sound box
WO2009055373A1 (en) 2007-10-22 2009-04-30 David Maeshiba Acoustic system
DK2859736T3 (en) * 2012-06-07 2017-05-01 Jda Tech Llc SPEAKER CABINETS WITH CONNECTIONS
EP3525481A1 (en) * 2018-02-07 2019-08-14 Panasonic Intellectual Property Corporation of America Speaker system
WO2022109567A1 (en) * 2020-11-18 2022-05-27 Shure Acquisition Holdings, Inc. Audio devices having low-frequency extension filter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB246634A (en) * 1924-12-11 1926-02-04 Edward Alfred Graham Improvements in or relating to acoustic amplifiers or radiators
US1810708A (en) * 1929-01-09 1931-06-16 Echodon Inc Method of and apparatus for amplifying and projecting sound waves
GB337264A (en) * 1929-12-13 1930-10-30 Celestion Ltd Improvements relating to acoustic instruments
US1985831A (en) * 1932-01-29 1934-12-25 Lee P Hynes Electric heater
US2214591A (en) * 1936-11-30 1940-09-10 Rca Corp Signal translating apparatus
US2224919A (en) * 1937-03-31 1940-12-17 Rca Corp Loud-speaker
US2205804A (en) * 1938-08-16 1940-06-25 Jewell W Wells Tone modifier device for electrical musical instruments
GB656732A (en) * 1949-04-21 1951-08-29 John Forrester Improvements in or relating to loud speakers

Cited By (10)

* 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
US2787332A (en) * 1952-09-06 1957-04-02 Norman C Fulmer Loud-speaker system
FR2653630A1 (en) * 1989-10-23 1991-04-26 Scotto Di Carlo Gilles Acoustic enclosure structure
GB2310104A (en) * 1996-02-12 1997-08-13 Yang Yi Fu Loud speaker enclosure and tunable audio reproduction apparatus
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
GB2365250A (en) * 2000-07-21 2002-02-13 B & W Loudspeakers Acoustic structures for loudspeakers
GB2365250B (en) * 2000-07-21 2004-06-16 B & W Loudspeakers Acoustic structures
US6896096B2 (en) 2000-07-21 2005-05-24 B&W Loudspeakers Limited Acoustic structures

Also Published As

Publication number Publication date
US2646852A (en) 1953-07-28

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