EP0847659B1 - Haut-parleurs comprenant un element rayonnant acoustique en forme de panneau - Google Patents

Haut-parleurs comprenant un element rayonnant acoustique en forme de panneau Download PDF

Info

Publication number
EP0847659B1
EP0847659B1 EP96929387A EP96929387A EP0847659B1 EP 0847659 B1 EP0847659 B1 EP 0847659B1 EP 96929387 A EP96929387 A EP 96929387A EP 96929387 A EP96929387 A EP 96929387A EP 0847659 B1 EP0847659 B1 EP 0847659B1
Authority
EP
European Patent Office
Prior art keywords
panel
radiator
baffle
form loudspeaker
loudspeaker according
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 - Lifetime
Application number
EP96929387A
Other languages
German (de)
English (en)
Other versions
EP0847659A1 (fr
Inventor
Henry Azima
Martin Colloms
Neil Harris
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.)
NVF Tech Ltd
Original Assignee
New Transducers 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34865233&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0847659(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from GBGB9517918.0A external-priority patent/GB9517918D0/en
Priority claimed from GBGB9522281.6A external-priority patent/GB9522281D0/en
Priority claimed from GBGB9606836.6A external-priority patent/GB9606836D0/en
Application filed by New Transducers Ltd filed Critical New Transducers Ltd
Publication of EP0847659A1 publication Critical patent/EP0847659A1/fr
Application granted granted Critical
Publication of EP0847659B1 publication Critical patent/EP0847659B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • H04R1/2803—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means 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
    • H04R1/22—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
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers

Definitions

  • the invention relates to loudspeakers and more particularly to loudspeakers comprising panel-form acoustic radiating elements.
  • Embodiments of the present invention use members of nature, structure and configuration achievable generally and/or specifically by implementing teachings of our co-pending PCT publication No. WO97/09842 of even date herewith.
  • Such members thus have capability to sustain and propagate input vibrational energy by bending waves in operative area(s) extending transversely of thickness often but not necessarily to edges of the member(s); are configured with or without anisotropy of bending stiffness to have resonant mode vibration components distributed over said area(s) beneficially for acoustic coupling with ambient air; and have predetermined preferential locations or sites within said area for transducer means, particularly operationally active or moving part(s) thereof effective in relation to acoustic vibrational activity in said area(s) and signals, usually electrical, corresponding to acoustic content of such vibrational activity.
  • This Invention is particularly concerned with active acoustic devices in the form of loudspeakers.
  • Members as above are herein called distributed mode acoustic radiators and are intended to be characterised as in the above PCT application and/or otherwise as specifically provided herein.
  • the invention is a panel-form loudspeaker characterised by a member having capability to sustain and propagate input vibrational energy by bending waves in at least one operative area extending transversely of thickness to have resonant mode vibration components distributed over said at least one area and have predetermined preferential locations or sites within said area for vibration exciter means and having a vibration exciter mounted on said member at one of said locations or sites to vibrate the member to cause it to resonate forming an acoustic radiator which provides an acoustic output when resonating, and a baffle surrounding and supporting the radiator.
  • a resilient suspension may be provided between the radiator and the baffle to support the radiator in the baffle.
  • the resilient suspension may be of an elastomeric material.
  • the vibration exciter may be mounted wholly and exclusively on the radiator.
  • the baffle may be formed as an enclosure having an open backed front box portion adapted to be mounted on a wall or the like.
  • the front box portion may be adapted to be mounted to align with a cavity in the wall.
  • the radiator may comprise a lightweight core separating a pair of high modulus lightweight skins.
  • a subwoofer may be mounted to be baffle.
  • a tweeter may be mounted to the baffle.
  • a panel-form loudspeaker (81) of the kind described and claimed in our co-pending International publication No. WO97/09842 of even date herewith comprising a rectangular frame (1) carrying a resilient suspension 3) round its inner periphery which supports a distributed mode sound radiating panel (2).
  • a transducer (9) e.g. as described in detail with reference to our co-pending International publication Nos. WO97/09859, WO97/09861, WO97/09858 of even date herewith, is mounted wholly and exclusively on or in the panel (2) at a predetermined location defined by dimensions x and y , the position of which location is calculated as described in our co-pending International publication No. WO97/09842 of even date herewith, to launch bending waves into the panel to cause the panel to resonate to radiate an acoustic output.
  • the transducer (9) is driven by a signal amplifier (10), e.g. an audio amplifier, connected to the transducer by conductors (28).
  • a signal amplifier (10) e.g. an audio amplifier
  • Amplifier loading and power requirements can be entirely normal, similar to conventional cone type speakers, sensitivity being of the order of 86 - 88dB/watt under room loaded conditions.
  • Amplifier load impedance is largely resistive at 6 ohms, power handling 20-80 watts. Where the panel core and/or skins are of metal, they may be made to act as a heat sink for the transducer to remove heat from the motor coil of the transducer and thus improve power handling.
  • Figures 2 a and 2 b are partial typical cross-sections through the loudspeaker (81) of Figure 1.
  • Figure 2 a shows that the frame (1), surround (3) and panel (2) are connected together by respective adhesive-bonded joints (20).
  • Suitable materials for the frame include lightweight framing, e.g. picture framing of extruded metal e.g. aluminium alloy or plastics.
  • Suitable surround materials include resilient materials such as foam rubber and foam plastics.
  • Suitable adhesives for the joints (20) include epoxy, acrylic and cyano-acrylate etc. adhesives.
  • Figure 2 b illustrates, to an enlarged scale, that the panel (2) is a rigid lightweight panel having a core (22) e.g. of a rigid plastics foam (97) e.g. cross linked polyvinylchloride or a cellular matrix (98) i.e. a honeycomb matrix of metal foil, plastics or the like, with the cells extending transversely to the plane of the panel, and enclosed by opposed skins (21) e.g. of paper, card, plastics or metal foil or sheet.
  • the skins are of plastics, they may be reinforced with fibres e.g. of carbon, glass, Kevlar (RTM) or the like in a manner known per se to increase their modulus.
  • RTM Kevlar
  • Envisaged skin layer materials and reinforcements thus include carbon, glass, Kevlar (RTM), Nomex (RTM) i.e. aramid etc. fibres in various lays and weaves, as well as paper, bonded paper laminates, melamine, and various synthetic plastics films of high modulus, such as Mylar (RTM), Kaptan (RTM), polycarbonate, phenolic, polyester or related plastics, and fibre reinforced plastics, etc. and metal sheet or foil.
  • Investigation of the Vectra grade of liquid crystal polymer thermoplastics shows that they may be useful for the injection moulding of ultra thin skins or shells of smaller size, say up to around 30cm diameter. This material self forms an orientated crystal structure in the direction of injection, a preferred orientation for the good propagation of treble energy from the driving point to the panel perimeter.
  • thermoplastics allow for the mould tooling to carry location and registration features such as grooves or rings for the accurate location of transducer parts e.g. the motor coil, and the magnet suspension. Additional with some weaker core materials it is calculated that it would be advantageous to increase the skin thickness locally e.g. in an area or annulus up to 150% of the transducer diameter, to reinforce that area and beneficially couple vibration energy into the panel. High frequency response will be improved with the softer foam materials by this means.
  • Envisaged core layer materials include fabricated honeycombs or corrugations of aluminium alloy sheet or foil, or Kevlar (RTM), Nomex (RTM), plain or bonded papers, and various synthetic plastics films, as well as expanded or foamed plastics or pulp materials, even aerogel metals if of suitably low density.
  • Some suitable core layer materials effectively exhibit usable self-skinning in their manufacture and/or otherwise have enough inherent stiffness for use without lamination between skin layers.
  • a high performance cellular core material is known under the trade name 'Rohacell' which may be suitable as a radiator panel and which is without skins. In practical terms, the aim is for an overall lightness and stiffness suited to a particular purpose, specifically including optimising contributions from core and skin layers and transitions between them.
  • piezo and electro dynamic transducers have negligible electromagnetic radiation or stray magnet fields.
  • Conventional speakers have a large magnetic field, up to 1 metre distant unless specific compensation counter measures are taken.
  • electrical connection can be made to the conductive parts of an appropriate DML panel or an electrically conductive foam or similar interface may be used for the edge mounting.
  • the suspension (3) may damp the edges of the panel (2) to prevent excessive edge movement of the panel. Additionally or alternatively, further damping may be applied, e.g. as patches, bonded to the panel in selected positions to damp excessive movement to distribute resonance equally over the panel.
  • the patches may be of bitumen-based material, as commonly used in conventional loudspeaker enclosures or may be of a resilient or rigid polymeric sheet material. Some materials, notably paper and card, and some cores may be self-damping. Where desired, the damping may be increased in the construction of the panels by employing resiliently setting, rather than rigid setting adhesives.
  • Effective said selective damping includes specific application to the panel including its sheet material of means permanently associated therewith. Edges and corners can be particularly significant for dominant and less dispersed low frequency vibration modes of panels hereof. Edge-wise fixing of damping means can usefully lead to a panel with its said sheet material fully framed, though their corners can often be relatively free, say for desired extension to lower frequency operation. Attachment can be by adhesive or self-adhesive materials. Other forms of useful damping, particularly in terms of more subtle effects and/or mid- and higher frequencies can be by way of suitable mass or masses affixed to the sheet material at predetermined effective medial localised positions of said area.
  • An acoustic panel as described above is bidirectional.
  • the sound energy from the back is not strongly phase related to that from the front. Consequently there is the benefit of overall summation of acoustic power in the room, sound energy of uniform frequency distribution, reduced reflective and standing wave effects and with the advantage of superior reproduction of the natural space and ambience in the reproduced sound recordings.
  • FIG 3 illustrates a first embodiment of distributed mode panel-form loudspeaker (81) generally of the kind shown in Figures 1 and 2 and in which the frame (1 is replaced by a baffle-board (6), e.g. of medium density fibreboard, having a rectangular aperture (82) in which a distributed mode radiator panel (2) is mounted with the interposition of a resilient suspension (3).
  • a transducer (9) of the kind described in our co-pending International publication Nos. WO97/09859, WO97/09861, WO97/09858 of even date herewith is mounted wholly and exclusively on the panel (2) to vibrate the panel to cause it to resonate to produce an acoustic output.
  • Such a baffle may have the effect of augmenting lower frequency response of the loudspeaker.
  • FIG 4 illustrates a second embodiment of loudspeaker (81) according to the present invention.
  • the loudspeaker comprises a box-like enclosure (8) having a top (148), a bottom (149), opposed sides (150), a back (151) and a front (152).
  • the front (152) of the enclosure (8) consists of a rigid lightweight distributed mode radiator panel (2) of the kind described with reference to Figures 1 and 2 and comprising a core (22) enclosed by opposed skins (21).
  • the panel (2) is supported in the enclosure (8) by means of a surrounding compliant suspension (17), e.g. a strip of latex rubber.
  • An acoustic absorbing lining may be provided in the enclosure.
  • a transducer (9) e,g, of the kinds shown in our co-pending International publication. Nos. WO97/09859, WO97/09861, WO97/09858 of even date herewith is mounted wholly and exclusively on the inwardly directed face of the panel (2) in a predetermined location as discussed in our co-pending International publication No. WO97/09842 of even date herewith, to vibrate the panel to cause it to resonate to produce an acoustic output.
  • the enclosure (8) may be formed with ports (109) e.g. in one side (150), to enhance bass performance of the loudspeaker. In any event, the use of the enclosure (8) will render the loudspeaker uni-directional, which may be desirable in some circumstances.
  • FIG. 5 illustrates a further embodiment of loudspeaker (81) according to the present invention and generally similar to that described above with reference to Figure 4.
  • the loudspeaker comprises a box-like enclosure (8) consisting of a front box portion (52) having an open back adapted to be mounted on a wall and aligned with a cavity (110) in the wall, e.g. in a stud-work wall, to reduce the depth of the loudspeaker enclosure while providing the benefits of a larger enclosure.
  • the front face (51) of the front box consists of a rigid lightweight distributed mode radiator (2) comprising a core (22) enclosed by opposed skins (21).
  • the panel (2) is supported in the enclosure (8) by means of a surrounding resilient suspension (17), e.g. of rubber latex strip.
  • the loudspeaker is thus generally of the kind described with reference to Figures 1 and 2 above.
  • a transducer (9) e.g. of the kind described with reference to our co-pending International publication Nos. WO97/09859, WO97/09861, WO97/09858 of even date herewith is mounted wholly and exclusively on the inwardly directed face of the panel (2) in a predetermined location as discussed in our co-pending International publication No. WO97/09842 to vibrate the panel to cause it to resonate to produce an acoustic output.
  • the loudspeakers of the present invention are relatively simple to make and can be made to have a relatively shallow depth, or apparently shallow depth, in comparison to conventional loudspeaker.
  • the loudspeakers of the present invention have a wide angle of dispersion in comparison ot conventional pistonic loudspeakers. Where the radiator panel is made from or is skinned with metal foil or sheet, the loudspeaker can be made to be shielded against radio-frequency emissions.

Claims (9)

  1. Un haut-parleur en forme de panneau (81) caractérisé par un élément (2) ayant la possibilité d'entretenir et de faire propager de l'énergie vibratoire d'entrée, par des ondes de flexion, dans au moins une zone active s'étendant transversalement à l'épaisseur, pour avoir des composantes de vibration de mode résonnant réparties sur la zone précitée, et pour avoir des emplacements ou des sites préférentiels prédéterminés à l'intérieur de cette zone, pour des moyens excitateurs de vibration, et ayant un excitateur de vibration (9) monté sur l'élément (2) à l'un des emplacements ou des sites précités, pour faire vibrer l'élément de façon qu'il résonne en formant un radiateur acoustique qui produit une émission acoustique lorsqu'il résonne, et un baffle (6, 8) qui entoure et supporte le radiateur.
  2. Un haut-parleur en forme de panneau selon la revendication 1, caractérisé par une suspension élastique (3, 17) entre le radiateur (2) et le baffle (6, 8), pour supporter le radiateur dans le baffle.
  3. Un haut-parleur en forme de panneau selon la revendication 1 ou la revendication 2, caractérisé en ce que la suspension élastique (3, 17) consiste en un élastomère.
  4. Un haut-parleur en forme de panneau selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'excitateur de vibration (9) est monté complètement et exclusivement sur le radiateur (2).
  5. Un haut-parleur en forme de panneau selon l'une quelconque des revendications précédentes, caractérisé en ce que le baffle (8) est réalisé sous la forme d'une enceinte ayant une partie de boíte avant (52) à arrière ouvert, adaptée pour être montée sur un mur ou autres.
  6. Un haut-parleur en forme de panneau selon la revendication 5, caractérisé en ce que la partie de boíte avant (52) est adaptée pour être montée en alignement avec une cavité (110) dans le mur.
  7. Un haut-parleur en forme de panneau selon l'une quelconque des revendications précédentes, caractérisé en ce que le radiateur (2) comprend une âme légère (22) séparant une paire de peaux (21) légères et à module élevé.
  8. Un haut-parleur en forme de panneau selon l'une quelconque des revendications précédentes, caractérisé par un haut-parleur de graves extrêmes monté sur le baffle (6, 8).
  9. Un haut-parleur en forme de panneau selon l'une quelconque des revendications précédentes, caractérisé par un haut-parleur d'aigus monté sur le baffle (6, 8).
EP96929387A 1995-09-02 1996-09-02 Haut-parleurs comprenant un element rayonnant acoustique en forme de panneau Expired - Lifetime EP0847659B1 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GB9517918 1995-09-02
GBGB9517918.0A GB9517918D0 (en) 1995-09-02 1995-09-02 Acoustic device
GB9522281 1995-10-31
GBGB9522281.6A GB9522281D0 (en) 1995-10-31 1995-10-31 Acoustic device
GBGB9606836.6A GB9606836D0 (en) 1996-03-30 1996-03-30 Acoustic device
GB9606836 1996-03-30
PCT/GB1996/002140 WO1997009840A2 (fr) 1995-09-02 1996-09-02 Haut-parleurs comprenant un element rayonnant acoustique en forme de panneau

Publications (2)

Publication Number Publication Date
EP0847659A1 EP0847659A1 (fr) 1998-06-17
EP0847659B1 true EP0847659B1 (fr) 1999-03-10

Family

ID=34865233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96929387A Expired - Lifetime EP0847659B1 (fr) 1995-09-02 1996-09-02 Haut-parleurs comprenant un element rayonnant acoustique en forme de panneau

Country Status (12)

Country Link
EP (1) EP0847659B1 (fr)
JP (1) JPH11512246A (fr)
AT (1) ATE177574T1 (fr)
AU (1) AU702920B2 (fr)
CA (1) CA2230702A1 (fr)
DE (1) DE69601723T2 (fr)
DK (1) DK0847659T3 (fr)
EA (1) EA002108B1 (fr)
ES (1) ES2131953T3 (fr)
HK (1) HK1008647A1 (fr)
RO (1) RO119046B1 (fr)
WO (1) WO1997009840A2 (fr)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9806994D0 (en) * 1998-04-02 1998-06-03 New Transducers Ltd Acoustic device
BR9812167A (pt) 1997-09-03 2000-07-18 New Transducers Ltd Painel compensador que compreende um sistema acústico inteiriço
GB9722079D0 (en) * 1997-10-21 1997-12-17 New Transducers Ltd Loudspeaker suspension
DE19757098C2 (de) * 1997-12-20 2003-01-09 Harman Audio Electronic Sys Aufhängung für Schallwiedergabeanordnungen nach dem Biegewellenprinzip
DE19821855A1 (de) 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Plattenlautsprecher
ID27400A (id) * 1998-06-22 2001-04-05 Slab Technology Ltd Pengeras suara
US6443586B1 (en) 1999-03-10 2002-09-03 New Transducers Limited Light-emitting panel-form loudspeaker
AU2928100A (en) * 1999-03-10 2000-09-28 New Transducers Limited Resonant-mode panel loudspeaker with light emitter
TW498698B (en) * 2000-05-08 2002-08-11 Koninkl Philips Electronics Nv Loudspeaker having an acoustic panel and an electrical driver
DE10030746B4 (de) * 2000-06-23 2008-11-20 Lisa Dräxlmaier GmbH Innenverkleidungsteil für Fahrzeuge und verfahren zur Herstellung desselben
FI20011303A (fi) 2001-06-19 2002-12-20 Nokia Corp Kaiutin
US10848118B2 (en) 2004-08-10 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
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
US8284955B2 (en) 2006-02-07 2012-10-09 Bongiovi Acoustics Llc System and method for digital signal processing
US9615189B2 (en) 2014-08-08 2017-04-04 Bongiovi Acoustics Llc Artificial ear apparatus and associated methods for generating a head related audio transfer function
US10069471B2 (en) 2006-02-07 2018-09-04 Bongiovi Acoustics Llc System and method for digital signal processing
US10701505B2 (en) 2006-02-07 2020-06-30 Bongiovi Acoustics Llc. System, method, and apparatus for generating and digitally processing a head related audio transfer function
US10848867B2 (en) 2006-02-07 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
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
DE102006039455A1 (de) * 2006-08-23 2008-03-13 Puren Gmbh Flächenlautsprechervorrichtung
JP2010110011A (ja) * 2010-01-13 2010-05-13 Sony Corp スピーカを有する機器
DE102012025313B3 (de) * 2012-12-22 2014-02-20 Audi Ag Schallwandler zur Wandlung elektrischer Signale in Luftschall
US9883318B2 (en) 2013-06-12 2018-01-30 Bongiovi Acoustics Llc System and method for stereo field enhancement in two-channel audio systems
US9264004B2 (en) 2013-06-12 2016-02-16 Bongiovi Acoustics Llc System and method for narrow bandwidth digital signal processing
US9906858B2 (en) 2013-10-22 2018-02-27 Bongiovi Acoustics Llc System and method for digital signal processing
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
US9615813B2 (en) 2014-04-16 2017-04-11 Bongiovi Acoustics Llc. Device for wide-band auscultation
US9564146B2 (en) 2014-08-01 2017-02-07 Bongiovi Acoustics Llc System and method for digital signal processing in deep diving environment
US9638672B2 (en) 2015-03-06 2017-05-02 Bongiovi Acoustics Llc System and method for acquiring acoustic information from a resonating body
US9906867B2 (en) 2015-11-16 2018-02-27 Bongiovi Acoustics Llc Surface acoustic transducer
US9621994B1 (en) 2015-11-16 2017-04-11 Bongiovi Acoustics Llc Surface acoustic transducer
US11211043B2 (en) 2018-04-11 2021-12-28 Bongiovi Acoustics Llc Audio enhanced hearing protection system
US10959035B2 (en) 2018-08-02 2021-03-23 Bongiovi Acoustics Llc System, method, and apparatus for generating and digitally processing a head related audio transfer function

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025474A (en) * 1987-09-29 1991-06-18 Matsushita Electric Industrial Co., Ltd. Speaker system with image projection screen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247925A (en) * 1962-03-08 1966-04-26 Lord Corp Loudspeaker
JPS5748153Y2 (fr) * 1977-11-26 1982-10-22
JPS5928798A (ja) * 1982-08-09 1984-02-15 Mitsubishi Electric Corp スピ−カ振動板
JPH01164935A (ja) * 1987-12-21 1989-06-29 Matsushita Electric Ind Co Ltd スクリーン装置
JPH02170795A (ja) * 1988-12-23 1990-07-02 Foster Electric Co Ltd パネル型スピーカ
JPH0386688U (fr) * 1989-12-21 1991-09-02
EP0541646B1 (fr) * 1990-08-04 1995-01-11 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Haut-parleur sous forme de panneau
JPH04186240A (ja) * 1990-11-20 1992-07-03 Matsushita Electric Ind Co Ltd スクリーン
US5400407A (en) * 1992-01-08 1995-03-21 Square D Company Tilt adjuster for a speaker support frame

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025474A (en) * 1987-09-29 1991-06-18 Matsushita Electric Industrial Co., Ltd. Speaker system with image projection screen

Also Published As

Publication number Publication date
CA2230702A1 (fr) 1997-03-13
ATE177574T1 (de) 1999-03-15
AU6880296A (en) 1997-03-27
EA002108B1 (ru) 2001-12-24
EA199800249A1 (ru) 1998-08-27
WO1997009840A2 (fr) 1997-03-13
HK1008647A1 (en) 1999-05-14
DK0847659T3 (da) 1999-09-27
ES2131953T3 (es) 1999-08-01
DE69601723T2 (de) 1999-09-16
WO1997009840A3 (fr) 1997-04-03
AU702920B2 (en) 1999-03-11
RO119046B1 (ro) 2004-02-27
DE69601723D1 (de) 1999-04-15
JPH11512246A (ja) 1999-10-19
EP0847659A1 (fr) 1998-06-17

Similar Documents

Publication Publication Date Title
EP0847659B1 (fr) Haut-parleurs comprenant un element rayonnant acoustique en forme de panneau
US6144746A (en) Loudspeakers comprising panel-form acoustic radiating elements
EP0847675B1 (fr) Transducteurs de vibrations
US6243473B1 (en) Laptop computer with loudspeaker(s)
US6198831B1 (en) Panel-form loudspeakers
EP0847665B1 (fr) Haut-parleurs en forme de panneau
AU703198B2 (en) Inertial vibration transducers
EP0847669B1 (fr) Visuel dote de haut-parleurs
EP0847671B1 (fr) Ordinateurs personnels
US6351542B2 (en) Loudspeakers with panel-form acoustic radiating elements
EP0847668B1 (fr) Haut-parleurs dotes d'elements radiants acoustiques en forme de panneau
EP0847664B1 (fr) Haut-parleurs comprenant des elements radiants acoustiques en forme de panneau
US6304661B1 (en) Loudspeakers comprising panel-form acoustic radiating elements
US6327369B1 (en) Loudspeakers comprising panel-form acoustic radiating elements
EP0847666B1 (fr) Haut-parleurs en forme de panneau

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980318

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL PAYMENT 980318;LT PAYMENT 980318;LV PAYMENT 980318;SI PAYMENT 980318

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19980708

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL PAYMENT 980318;LT PAYMENT 980318;LV PAYMENT 980318;SI PAYMENT 980318

LTIE Lt: invalidation of european patent or patent extension
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990310

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990310

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990310

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990310

REF Corresponds to:

Ref document number: 177574

Country of ref document: AT

Date of ref document: 19990315

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69601723

Country of ref document: DE

Date of ref document: 19990415

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2131953

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990902

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19990609

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: INTERESSENGEMEINSCHAFT FUER RUNDFUNKSCHUTZRECHTE G

Effective date: 19991210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

NLR1 Nl: opposition has been filed with the epo

Opponent name: INTERESSENGEMEINSCHAFT

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: NEW TRANSDUCERS LIMITED

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: NEW TRANSDUCERS LIMITED

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PLBP Opposition withdrawn

Free format text: ORIGINAL CODE: 0009264

PLBL Opposition procedure terminated

Free format text: ORIGINAL CODE: EPIDOS OPPC

PLBM Termination of opposition procedure: date of legal effect published

Free format text: ORIGINAL CODE: 0009276

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION PROCEDURE CLOSED

27C Opposition proceedings terminated

Effective date: 20030707

NLR2 Nl: decision of opposition

Effective date: 20030707

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20040810

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040812

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20040813

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040817

Year of fee payment: 9

Ref country code: FI

Payment date: 20040817

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20040819

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20040824

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20040825

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040906

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040916

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050902

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050902

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050902

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050902

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050902

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050903

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060302

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060401

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050902

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060531

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20060401

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060531

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050903

BERE Be: lapsed

Owner name: *NEW TRANSDUCERS LTD

Effective date: 20050930

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080829

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100401