GB659818A - Improvements in or relating to loudspeaker units - Google Patents

Improvements in or relating to loudspeaker units

Info

Publication number
GB659818A
GB659818A GB2723247A GB2723247A GB659818A GB 659818 A GB659818 A GB 659818A GB 2723247 A GB2723247 A GB 2723247A GB 2723247 A GB2723247 A GB 2723247A GB 659818 A GB659818 A GB 659818A
Authority
GB
United Kingdom
Prior art keywords
sound
relating
loudspeaker units
column
brandes
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
GB2723247A
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.)
ROBERT HENRY TRIER
Kolster Brandes Ltd
Original Assignee
ROBERT HENRY TRIER
Kolster Brandes 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 ROBERT HENRY TRIER, Kolster Brandes Ltd filed Critical ROBERT HENRY TRIER
Priority to GB2723247A priority Critical patent/GB659818A/en
Publication of GB659818A publication Critical patent/GB659818A/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
    • 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
    • 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
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Slot Machines And Peripheral Devices (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

659,818. Sound directing appliances. KOLSTER BRANDES, Ltd., and TRIER, R. H. Oct. 10, 1947, No. 27232. [Class 13] [Also in Group XXXIX] A cone loud-speaker 5 is mounted at the top of an open column 1 lined with sound - absorbent material, and is surmounted by a conical reflector 7 diffusing the sound horizontally. The column 1 may be made of plywood curved to reduce panel resonance. Specification 659,817 is referred to.
GB2723247A 1947-10-10 1947-10-10 Improvements in or relating to loudspeaker units Expired GB659818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2723247A GB659818A (en) 1947-10-10 1947-10-10 Improvements in or relating to loudspeaker units

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2723247A GB659818A (en) 1947-10-10 1947-10-10 Improvements in or relating to loudspeaker units

Publications (1)

Publication Number Publication Date
GB659818A true GB659818A (en) 1951-10-31

Family

ID=10256256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2723247A Expired GB659818A (en) 1947-10-10 1947-10-10 Improvements in or relating to loudspeaker units

Country Status (1)

Country Link
GB (1) GB659818A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400217A (en) * 1965-02-08 1968-09-03 Oscar E. Kraut Method of and means for loudspeaker sound wave distribution
US4185167A (en) * 1976-06-28 1980-01-22 Acoustical Design Incorporated Sound masking package
US4227050A (en) * 1979-01-11 1980-10-07 Wilson Bernard T Virtual sound source system
US4501934A (en) * 1983-07-18 1985-02-26 W2 Vehicle Design And Development Loudspeaker system
FR2614489A1 (en) * 1987-04-24 1988-10-28 France Amaury De Loudspeaker
EP0669781A4 (en) * 1992-07-23 1995-05-23 Katsutoshi Tozawa Speaker system.
EP1107639A3 (en) * 1999-12-02 2007-03-14 Timedomain Corporation Speaker apparatus with means for producing complex low frequency waveform

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400217A (en) * 1965-02-08 1968-09-03 Oscar E. Kraut Method of and means for loudspeaker sound wave distribution
US4185167A (en) * 1976-06-28 1980-01-22 Acoustical Design Incorporated Sound masking package
US4227050A (en) * 1979-01-11 1980-10-07 Wilson Bernard T Virtual sound source system
US4501934A (en) * 1983-07-18 1985-02-26 W2 Vehicle Design And Development Loudspeaker system
FR2614489A1 (en) * 1987-04-24 1988-10-28 France Amaury De Loudspeaker
EP0669781A4 (en) * 1992-07-23 1995-05-23 Katsutoshi Tozawa Speaker system.
EP0669781A1 (en) * 1992-07-23 1995-08-30 TOZAWA, Katsutoshi Speaker system
US6320971B1 (en) 1992-07-23 2001-11-20 Katsutoshi Tozawa Speaker system and a method for improving sound quality thereof
USRE39330E1 (en) * 1992-07-23 2006-10-10 Katsutoshi Tozawa Speaker system and a method for improving sound quality thereof
EP1107639A3 (en) * 1999-12-02 2007-03-14 Timedomain Corporation Speaker apparatus with means for producing complex low frequency waveform

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