GB1122399A - Improvements in or relating to loudspeakers - Google Patents

Improvements in or relating to loudspeakers

Info

Publication number
GB1122399A
GB1122399A GB3492064A GB3492064A GB1122399A GB 1122399 A GB1122399 A GB 1122399A GB 3492064 A GB3492064 A GB 3492064A GB 3492064 A GB3492064 A GB 3492064A GB 1122399 A GB1122399 A GB 1122399A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
coupling
annulus
loudspeaker
ins
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
GB3492064A
Inventor
Stanley Kelly
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.)
Decca Ltd
Original Assignee
Decca 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 Decca Ltd filed Critical Decca Ltd
Priority to GB3492064A priority Critical patent/GB1122399A/en
Priority to DE19651462132 priority patent/DE1462132A1/en
Publication of GB1122399A publication Critical patent/GB1122399A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/201—Damping aspects of the outer suspension of loudspeaker diaphragms by addition of additional damping means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1,122,399. Loudspeakers. DECCA Ltd. 20 Aug., 1965 [26 Aug., 1964], No. 34920/64. Heading H4J. A moving coil loudspeaker has a circular piston-like diaphragm which is coupled to the loudspeaker housing via a loaded compliant coupling so as to improve low frequency response by introducing multiple resonances at #2 and 1/#2 times the basic resonance frequency. The peripheral coupling 18 and spider 17 may be sheets of natural fibre, e.g. doped linen, artificial fibre e.g. nylon, plastics, e.g. PVC or metal, e.g. aluminium. The loaded coupling includes a channelled annulus of aluminium having the same effective area and mass as the diaphragm. More than one such annulus may be used and the annulus need not be continuous. The loudspeaker is mounted in an aperture of a closed casing whose enclosed volume V cu. ins. is related to the diameter D ins. of the diaphragm by the relationship D = 0À86 4#v The coupling 18 serves to seal the gap between the diaphragm and its support. The diaphragm may be conical, flat or dish-shaped and is preferably made of foamed polyurethane.
GB3492064A 1964-08-26 1964-08-26 Improvements in or relating to loudspeakers Expired GB1122399A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3492064A GB1122399A (en) 1964-08-26 1964-08-26 Improvements in or relating to loudspeakers
DE19651462132 DE1462132A1 (en) 1964-08-26 1965-08-26 speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3492064A GB1122399A (en) 1964-08-26 1964-08-26 Improvements in or relating to loudspeakers

Publications (1)

Publication Number Publication Date
GB1122399A true GB1122399A (en) 1968-08-07

Family

ID=10371567

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3492064A Expired GB1122399A (en) 1964-08-26 1964-08-26 Improvements in or relating to loudspeakers

Country Status (2)

Country Link
DE (1) DE1462132A1 (en)
GB (1) GB1122399A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010013199A1 (en) 2008-07-28 2010-02-04 Nxp B.V. Membrane for an acoustic transducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010013199A1 (en) 2008-07-28 2010-02-04 Nxp B.V. Membrane for an acoustic transducer
CN102106159A (en) * 2008-07-28 2011-06-22 Nxp股份有限公司 Membrane for an acoustic transducer

Also Published As

Publication number Publication date
DE1462132A1 (en) 1969-02-27

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