HK1000544A1 - Panel-form loudspeaker - Google Patents

Panel-form loudspeaker

Info

Publication number
HK1000544A1
HK1000544A1 HK97102078A HK97102078A HK1000544A1 HK 1000544 A1 HK1000544 A1 HK 1000544A1 HK 97102078 A HK97102078 A HK 97102078A HK 97102078 A HK97102078 A HK 97102078A HK 1000544 A1 HK1000544 A1 HK 1000544A1
Authority
HK
Hong Kong
Prior art keywords
panel
skinned
aluminium
motions
composite
Prior art date
Application number
HK97102078A
Inventor
Heron Kenneth Harry
Original Assignee
Secr Defence Brit
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
Priority claimed from GB9017133A external-priority patent/GB2246684A/en
Application filed by Secr Defence Brit filed Critical Secr Defence Brit
Publication of HK1000544A1 publication Critical patent/HK1000544A1/en

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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/06—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
    • G10K1/062—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated
    • G10K1/066—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated the sounding member being a tube, plate or rod
    • 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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • 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
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Laminated Bodies (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

A panel-form loudspeaker has a resonant multi-mode radiator panel which is excited at frequencies above the fundamental frequency and the coincidence frequency of the panel to provide high radiation efficiency through multi-medal motions within the panel, in contrast to the pistonic motions required of conventional loudspeakers. The radiator panel is a skinned composite with a honeycomb or similar core and must be such that it has a ratio of bending stiffness to the third power of panel mass per unit area (in mks units) of at least 10 and preferably at least 100. An aluminium skinned, aluminium honeycomb cored composite can meet this more severe criterion easily. <IMAGE>
HK97102078A 1990-08-04 1997-11-03 Panel-form loudspeaker HK1000544A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9017133A GB2246684A (en) 1990-08-04 1990-08-04 Panel form loudspeaker
GB919103969A GB9103969D0 (en) 1990-08-04 1991-02-26 Panel-form loudspeaker

Publications (1)

Publication Number Publication Date
HK1000544A1 true HK1000544A1 (en) 1998-04-03

Family

ID=26297455

Family Applications (1)

Application Number Title Priority Date Filing Date
HK97102078A HK1000544A1 (en) 1990-08-04 1997-11-03 Panel-form loudspeaker

Country Status (8)

Country Link
EP (1) EP0541646B1 (en)
JP (2) JP3034952B2 (en)
AT (1) ATE117155T1 (en)
DE (1) DE69106712T2 (en)
DK (1) DK0541646T3 (en)
GB (1) GB2262861B (en)
HK (1) HK1000544A1 (en)
WO (1) WO1992003024A1 (en)

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Also Published As

Publication number Publication date
JP2000138994A (en) 2000-05-16
DE69106712T2 (en) 1995-06-08
JPH05509211A (en) 1993-12-16
EP0541646A1 (en) 1993-05-19
GB2262861A (en) 1993-06-30
DE69106712D1 (en) 1995-02-23
GB9301628D0 (en) 1993-04-14
WO1992003024A1 (en) 1992-02-20
JP3084281B2 (en) 2000-09-04
DK0541646T3 (en) 1995-03-20
JP3034952B2 (en) 2000-04-17
ATE117155T1 (en) 1995-01-15
EP0541646B1 (en) 1995-01-11
GB2262861B (en) 1994-06-01

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Legal Events

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PF Patent in force
PE Patent expired

Effective date: 20110725