DK0541646T3 - Panel shaped speaker - Google Patents

Panel shaped speaker

Info

Publication number
DK0541646T3
DK0541646T3 DK91914046.7T DK91914046T DK0541646T3 DK 0541646 T3 DK0541646 T3 DK 0541646T3 DK 91914046 T DK91914046 T DK 91914046T DK 0541646 T3 DK0541646 T3 DK 0541646T3
Authority
DK
Denmark
Prior art keywords
panel
skinned
aluminium
motions
composite
Prior art date
Application number
DK91914046.7T
Other languages
Danish (da)
Inventor
Kenneth Harry Heron
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
Application granted granted Critical
Publication of DK0541646T3 publication Critical patent/DK0541646T3/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)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Laminated Bodies (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>
DK91914046.7T 1990-08-04 1991-07-26 Panel shaped speaker DK0541646T3 (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
DK0541646T3 true DK0541646T3 (en) 1995-03-20

Family

ID=26297455

Family Applications (1)

Application Number Title Priority Date Filing Date
DK91914046.7T DK0541646T3 (en) 1990-08-04 1991-07-26 Panel shaped speaker

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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DE19818988A1 (en) * 1998-04-28 1999-11-11 Siemens Ag Electronic apparatus with electro-acoustic transducer e.g. for mobile telephone
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DE29923450U1 (en) 1998-06-22 2000-09-28 Slab Technology Ltd, Albany, Auckland speaker
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GB2341511A (en) * 1998-09-14 2000-03-15 New Transducers Ltd The diaphragm of a sandwich-construction panel-form loudspeaker has collapsed edges
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US11431312B2 (en) 2004-08-10 2022-08-30 Bongiovi Acoustics Llc System and method for digital signal processing
US10158337B2 (en) 2004-08-10 2018-12-18 Bongiovi Acoustics Llc System and method for digital signal processing
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US11202161B2 (en) 2006-02-07 2021-12-14 Bongiovi Acoustics Llc System, method, and apparatus for generating and digitally processing a head related audio transfer function
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US9906858B2 (en) 2013-10-22 2018-02-27 Bongiovi Acoustics Llc System and method for digital signal processing
US9615813B2 (en) 2014-04-16 2017-04-11 Bongiovi Acoustics Llc. Device for wide-band auscultation
US10639000B2 (en) 2014-04-16 2020-05-05 Bongiovi Acoustics Llc Device for wide-band auscultation
US10820883B2 (en) 2014-04-16 2020-11-03 Bongiovi Acoustics Llc Noise reduction assembly for auscultation of a body
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Also Published As

Publication number Publication date
WO1992003024A1 (en) 1992-02-20
JPH05509211A (en) 1993-12-16
ATE117155T1 (en) 1995-01-15
GB9301628D0 (en) 1993-04-14
JP3084281B2 (en) 2000-09-04
EP0541646B1 (en) 1995-01-11
DE69106712D1 (en) 1995-02-23
EP0541646A1 (en) 1993-05-19
GB2262861A (en) 1993-06-30
GB2262861B (en) 1994-06-01
JP2000138994A (en) 2000-05-16
JP3034952B2 (en) 2000-04-17
HK1000544A1 (en) 1998-04-03
DE69106712T2 (en) 1995-06-08

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