GB631799A - Improvements in or relating to loud speakers - Google Patents

Improvements in or relating to loud speakers

Info

Publication number
GB631799A
GB631799A GB1882846A GB1882846A GB631799A GB 631799 A GB631799 A GB 631799A GB 1882846 A GB1882846 A GB 1882846A GB 1882846 A GB1882846 A GB 1882846A GB 631799 A GB631799 A GB 631799A
Authority
GB
United Kingdom
Prior art keywords
loud
tube
speaker unit
relating
area
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
GB1882846A
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 GB1882846A priority Critical patent/GB631799A/en
Publication of GB631799A publication Critical patent/GB631799A/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

631,799. Loud-speakers. FORRESTER, J. June 24, 1946, No. 18828. [Class 40 (iv)] A loud-speaker unit 2 is mounted at and directed into one end of a tube 1, the other end 4 of which is closed by a non-vibratory barrier. The tube 1 is provided with an aperture adjacent to the loud-speaker unit, which may be formed in the wall of the tube, or as shown in the Figure, may be formed by the open end 3, the loud-speaker unit then having a smaller frontal area than the crosssectional area of the tube at this end. The aperture may be made variable. The tube may be convoluted and may progressively increase in area from the closed end to the end at which the loud-speaker unit is located.
GB1882846A 1946-06-24 1946-06-24 Improvements in or relating to loud speakers Expired GB631799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1882846A GB631799A (en) 1946-06-24 1946-06-24 Improvements in or relating to loud speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1882846A GB631799A (en) 1946-06-24 1946-06-24 Improvements in or relating to loud speakers

Publications (1)

Publication Number Publication Date
GB631799A true GB631799A (en) 1949-11-10

Family

ID=10119105

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1882846A Expired GB631799A (en) 1946-06-24 1946-06-24 Improvements in or relating to loud speakers

Country Status (1)

Country Link
GB (1) GB631799A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009134591A1 (en) * 2008-05-02 2009-11-05 Bose Corporation Passive directional acoustic radiating
US8265310B2 (en) 2010-03-03 2012-09-11 Bose Corporation Multi-element directional acoustic arrays
US8295526B2 (en) 2008-02-21 2012-10-23 Bose Corporation Low frequency enclosure for video display devices
US8351629B2 (en) 2008-02-21 2013-01-08 Robert Preston Parker Waveguide electroacoustical transducing
US8553894B2 (en) 2010-08-12 2013-10-08 Bose Corporation Active and passive directional acoustic radiating
US9451355B1 (en) 2015-03-31 2016-09-20 Bose Corporation Directional acoustic device
US10057701B2 (en) 2015-03-31 2018-08-21 Bose Corporation Method of manufacturing a loudspeaker

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8295526B2 (en) 2008-02-21 2012-10-23 Bose Corporation Low frequency enclosure for video display devices
US8351629B2 (en) 2008-02-21 2013-01-08 Robert Preston Parker Waveguide electroacoustical transducing
WO2009134591A1 (en) * 2008-05-02 2009-11-05 Bose Corporation Passive directional acoustic radiating
US8351630B2 (en) 2008-05-02 2013-01-08 Bose Corporation Passive directional acoustical radiating
US8265310B2 (en) 2010-03-03 2012-09-11 Bose Corporation Multi-element directional acoustic arrays
US8553894B2 (en) 2010-08-12 2013-10-08 Bose Corporation Active and passive directional acoustic radiating
US9451355B1 (en) 2015-03-31 2016-09-20 Bose Corporation Directional acoustic device
US10057701B2 (en) 2015-03-31 2018-08-21 Bose Corporation Method of manufacturing a loudspeaker

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