WO1997009841A2 - Ecrans d'affichage a haut-parleurs - Google Patents

Ecrans d'affichage a haut-parleurs Download PDF

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Publication number
WO1997009841A2
WO1997009841A2 PCT/GB1996/002144 GB9602144W WO9709841A2 WO 1997009841 A2 WO1997009841 A2 WO 1997009841A2 GB 9602144 W GB9602144 W GB 9602144W WO 9709841 A2 WO9709841 A2 WO 9709841A2
Authority
WO
WIPO (PCT)
Prior art keywords
card
greetings
board
panel
transducer
Prior art date
Application number
PCT/GB1996/002144
Other languages
English (en)
Other versions
WO1997009841A3 (fr
Inventor
Henry Azima
Martin Colloms
Neil Harris
Original Assignee
New Transducers Limited
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 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
Priority to AT96929389T priority Critical patent/ATE177575T1/de
Priority to IL12348596A priority patent/IL123485A/xx
Priority to CZ98584A priority patent/CZ58498A3/cs
Priority to RO98-00637A priority patent/RO119043B1/ro
Priority to TR1998/00360T priority patent/TR199800360T1/xx
Priority to PL96325273A priority patent/PL182468B1/pl
Priority to EA199800258A priority patent/EA000859B1/ru
Priority to ES96929389T priority patent/ES2130847T3/es
Priority to AU68804/96A priority patent/AU703015B2/en
Priority to DE69601724T priority patent/DE69601724T2/de
Priority to HU9900177A priority patent/HUP9900177A3/hu
Application filed by New Transducers Limited filed Critical New Transducers Limited
Priority to BR9610502-0A priority patent/BR9610502A/pt
Priority to NZ316546A priority patent/NZ316546A/en
Priority to PCT/GB1996/002144 priority patent/WO1997009841A2/fr
Priority to JP9510947A priority patent/JPH11512248A/ja
Priority to SK265-98A priority patent/SK26598A3/sk
Priority to DK96929389T priority patent/DK0847660T3/da
Priority to EP96929389A priority patent/EP0847660B1/fr
Priority to CN96196704A priority patent/CN1195460A/zh
Priority to US09/011,835 priority patent/US6181799B1/en
Priority to MX9801517A priority patent/MX9801517A/es
Publication of WO1997009841A2 publication Critical patent/WO1997009841A2/fr
Publication of WO1997009841A3 publication Critical patent/WO1997009841A3/fr
Priority to HK98109450A priority patent/HK1008596A1/xx

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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D15/00—Printed matter of special format or style not otherwise provided for
    • B42D15/02—Postcards; Greeting, menu, business or like cards; Letter cards or letter-sheets
    • B42D15/022—Postcards; Greeting, menu, business or like cards; Letter cards or letter-sheets combined with permanently fastened sound-producing or light-emitting means or carrying sound records
    • 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

Definitions

  • the invention relates to greetings or the like cards.
  • a panel-form loudspeaker comprising:- a resonant multi-mode radiator element being a unitary sandwich panel formed of two skins of material with a spacing core of transverse cellular construction, wherein the panel is such as to have ratio of bending stiffness (B) , in all orientations, to the cube power of panel mass per unit surface area ( ⁇ ) of at least 10; a mounting means which supports the panel or attaches to it a supporting body, in a free undamped manner; and an electro-mechanical drive means coupled to the panel which serves to excite a multi-modal resonance in the radiator panel in response to an electrical input within a working frequency band for the loudspeaker.
  • B bending stiffness
  • ⁇ cube power of panel mass per unit surface area
  • 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 application no. (our case P.5711) 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 greetings and the like cards incorporating acoustic devices e.g. in the form of loudspeakers.
  • the term 'greetings card' is intended to encompass analogous cards such, for example as advent calendars and the like.
  • the invention is a greetings or the like card, characterised by a board forming at least part of the card and in that the board is a distributed mode acoustic radiator having a transducer mounted wholly and exclusively on the radiator to vibrate the radiator to cause it to resonate.
  • the board may be a panel having a cellular core sandwiched between skin layers.
  • the board may comprise a core of foamed plastics sandwiched between sheets of craft board.
  • the transducer may be a piezo-electric bender.
  • the bender may be a crystalline member, e.g. a disc.
  • the board may form a leaf of the card.
  • the card may have a pair of leaves, and means associated with the leaves for triggering actuation of the radiator on movement of one leaf relative to the other leaf.
  • the greetings or the like card may comprise a signal generator, an amplifier and an electric battery on a leaf of the card.
  • Figure 1 is a diagram showing a distributed-mode loudspeaker as described and claimed in our co-pending International application No. (our case P.5711);
  • Figure 2a. is a partial section on the line A-A of Figure 1;
  • Figure 2b is an enlarged cross-section through a distributed mode radiator of the kind shown in Figure 2a. and showing two alternative constructions;
  • Figure 3 is a perspective diagram of an embodiment of greetings card according to the present invention.
  • Figure 4 is a perspective view of a transducer.
  • FIG. 1 of the drawings there is shown a panel-form loudspeaker (81) of the kind described and claimed in our co-pending International application (our case P.5711) 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).
  • Figure 4 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 application (our case P.5711) 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) .
  • Figures 2a_ and 2b are partial typical cross-sections through the loudspeaker (81) of Figure 1.
  • Figure 2a 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 2b 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. Where the skins are of plastics, they may be reinforced with fibres e.g. of carbon, glass, Kevlar or the like in a manner known per se to increase their modulus.
  • a core 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
  • 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.
  • 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.
  • 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.
  • 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 bi ⁇ directional.
  • 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.
  • Figure 3 illustrates a greetings or the like card (144) incorporating loudspeaker technology of Figures 1 and 2.
  • the card is in the form of a folded member having a front leaf (145) and a rear leaf (146).
  • At least the rear leaf (146) is made from a composite board consisting of a core (22) of foam plastics sandwiched by skins of craft board (21) to form a rigid lightweight distributed mode acoustic radiator panel (2) of the kind described in Figures 1 and 2.
  • Such composite boards are known under the trade name KAPPABOARD. It has been found that a panel shaped according to the European standard 'A' series is suitable.
  • a transducer (9) as shown in Figure 4 is attached to the rear leaf (146) to vibrate the panel (2) to cause it to resonate to produce an acoustic output.
  • the transducer (9) is driven by a signal generator/amplifier/ battery unit (112) which is actuated by a switch (53) concealed in the fold of the card so as to activate the signal generator when the card is opened.
  • FIG 4 shows a transducer (9) for a distributed mode panel (2) in the form of a crystalline disc-like piezo bender (27) mounted on a disc (118), e.g. of brass, which is bonded to a face of the panel (2), e.g. by an adhesive bond (20) .
  • a transducer (9) for a distributed mode panel (2) in the form of a crystalline disc-like piezo bender (27) mounted on a disc (118), e.g. of brass, which is bonded to a face of the panel (2), e.g. by an adhesive bond (20) .
  • an acoustic signal applied to the transducer (9) via leads (28) will cause the piezo disc (27) to bend and thus locally resiliently deform the panel (2) to launch bending waves into the panel.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Credit Cards Or The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Detergent Compositions (AREA)
  • Fats And Perfumes (AREA)
  • Medicinal Preparation (AREA)
  • Paper (AREA)
  • Cosmetics (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Polarising Elements (AREA)
  • Lubricants (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Structure Of Receivers (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

L'invention concerne une carte de voeux ou analogue (144), caractérisée en ce qu'un panneau (2) forme au moins une partie de la carte et en ce que ledit panneau est un élément rayonnant acoustique à mode réparti sur lequel est monté entièrement et exclusivement un transducteur (9) ayant pour fonction de faire vibrer l'élément rayonnant et de le faire résonner.
PCT/GB1996/002144 1995-09-02 1996-09-02 Ecrans d'affichage a haut-parleurs WO1997009841A2 (fr)

Priority Applications (22)

Application Number Priority Date Filing Date Title
CN96196704A CN1195460A (zh) 1995-09-02 1996-09-02 问候卡或其类似卡
US09/011,835 US6181799B1 (en) 1995-09-02 1996-09-02 Greetings or the like card
MX9801517A MX9801517A (es) 1995-09-02 1996-09-02 Tarjetas de salutacion o similares.
NZ316546A NZ316546A (en) 1995-09-02 1996-09-02 Greeting card having a loudspeaker comprising a board having capability to sustain and propagate input vibrational energy
CZ98584A CZ58498A3 (cs) 1995-09-02 1996-09-02 Blahopřejný lístek nebo podobný lístek
RO98-00637A RO119043B1 (ro) 1995-09-02 1996-09-02 Felicitare
TR1998/00360T TR199800360T1 (xx) 1995-09-02 1996-09-02 Tebrik kart� veye benzeri kart
PL96325273A PL182468B1 (pl) 1995-09-02 1996-09-02 Karta z życzeniami
EA199800258A EA000859B1 (ru) 1995-09-02 1996-09-02 Поздравительная или подобная карточка
ES96929389T ES2130847T3 (es) 1995-09-02 1996-09-02 Tarjetas de salutacion o similares.
AU68804/96A AU703015B2 (en) 1995-09-02 1996-09-02 Greetings or the like card
DE69601724T DE69601724T2 (de) 1995-09-02 1996-09-02 Grusskarte oder dergleichen mit lautsprecher
HU9900177A HUP9900177A3 (en) 1995-09-02 1996-09-02 Greetings or the like card
AT96929389T ATE177575T1 (de) 1995-09-02 1996-09-02 Grusskarte oder dergleichen mit lautsprecher
BR9610502-0A BR9610502A (pt) 1995-09-02 1996-09-02 Cartão de felicitação ou similar
IL12348596A IL123485A (en) 1995-09-02 1996-09-02 Greetings or the like card
PCT/GB1996/002144 WO1997009841A2 (fr) 1995-09-02 1996-09-02 Ecrans d'affichage a haut-parleurs
JP9510947A JPH11512248A (ja) 1995-09-02 1996-09-02 グリーティング等のカード
SK265-98A SK26598A3 (en) 1995-09-02 1996-09-02 Greetings or the like card
DK96929389T DK0847660T3 (da) 1995-09-02 1996-09-02 Lykønskningskort eller lignende med højttaler
EP96929389A EP0847660B1 (fr) 1995-09-02 1996-09-02 Carte de voeux ou carte avec haut-parleur
HK98109450A HK1008596A1 (en) 1995-09-02 1998-07-28 Greetings card or the like with loudspeaker

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GB9517918.0 1995-09-02
GBGB9517918.0A GB9517918D0 (en) 1995-09-02 1995-09-02 Acoustic device
GB9522281.6 1995-10-31
GBGB9522281.6A GB9522281D0 (en) 1995-10-31 1995-10-31 Acoustic device
GB9606836.6 1996-03-30
GBGB9606836.6A GB9606836D0 (en) 1996-03-30 1996-03-30 Acoustic device
PCT/GB1996/002144 WO1997009841A2 (fr) 1995-09-02 1996-09-02 Ecrans d'affichage a haut-parleurs

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/011,835 Continuation-In-Part US6181799B1 (en) 1919-09-02 1996-09-02 Greetings or the like card

Publications (2)

Publication Number Publication Date
WO1997009841A2 true WO1997009841A2 (fr) 1997-03-13
WO1997009841A3 WO1997009841A3 (fr) 1997-05-01

Family

ID=34865236

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/002144 WO1997009841A2 (fr) 1995-09-02 1996-09-02 Ecrans d'affichage a haut-parleurs

Country Status (20)

Country Link
EP (1) EP0847660B1 (fr)
JP (1) JPH11512248A (fr)
CN (1) CN1195460A (fr)
AT (1) ATE177575T1 (fr)
AU (1) AU703015B2 (fr)
BR (1) BR9610502A (fr)
CZ (1) CZ58498A3 (fr)
DE (1) DE69601724T2 (fr)
DK (1) DK0847660T3 (fr)
EA (1) EA000859B1 (fr)
ES (1) ES2130847T3 (fr)
HK (1) HK1008596A1 (fr)
HU (1) HUP9900177A3 (fr)
IL (1) IL123485A (fr)
NZ (1) NZ316546A (fr)
PL (1) PL182468B1 (fr)
RO (1) RO119043B1 (fr)
SK (1) SK26598A3 (fr)
TR (1) TR199800360T1 (fr)
WO (1) WO1997009841A2 (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067974A1 (fr) * 1998-06-22 1999-12-29 Slab Technology Limited Haut-parleurs
WO2001067808A1 (fr) * 2000-03-07 2001-09-13 Slab Dsp Limited Haut-parleur avec suppression des bruits parasites
US9621994B1 (en) 2015-11-16 2017-04-11 Bongiovi Acoustics Llc Surface acoustic transducer
US9615813B2 (en) 2014-04-16 2017-04-11 Bongiovi Acoustics Llc. Device for wide-band auscultation
US9638672B2 (en) 2015-03-06 2017-05-02 Bongiovi Acoustics Llc System and method for acquiring acoustic information from a resonating body
US9741355B2 (en) 2013-06-12 2017-08-22 Bongiovi Acoustics Llc System and method for narrow bandwidth digital signal processing
US9793872B2 (en) 2006-02-07 2017-10-17 Bongiovi Acoustics Llc System and method for digital signal processing
US9883318B2 (en) 2013-06-12 2018-01-30 Bongiovi Acoustics Llc System and method for stereo field enhancement in two-channel audio systems
US9906867B2 (en) 2015-11-16 2018-02-27 Bongiovi Acoustics Llc Surface acoustic transducer
US9906858B2 (en) 2013-10-22 2018-02-27 Bongiovi Acoustics Llc System and method for digital signal processing
US10069471B2 (en) 2006-02-07 2018-09-04 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
US10639000B2 (en) 2014-04-16 2020-05-05 Bongiovi Acoustics Llc Device for wide-band auscultation
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
US10820883B2 (en) 2014-04-16 2020-11-03 Bongiovi Acoustics Llc Noise reduction assembly for auscultation of a body
US10848118B2 (en) 2004-08-10 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
US10848867B2 (en) 2006-02-07 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
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
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
US11211043B2 (en) 2018-04-11 2021-12-28 Bongiovi Acoustics Llc Audio enhanced hearing protection system
US11431312B2 (en) 2004-08-10 2022-08-30 Bongiovi Acoustics Llc System and method for digital signal processing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0510484D0 (en) * 2005-05-24 2005-06-29 New Transducers Ltd Acoustic device
US9564146B2 (en) 2014-08-01 2017-02-07 Bongiovi Acoustics Llc System and method for digital signal processing in deep diving environment
DE102020112725A1 (de) 2020-05-11 2021-11-11 Technische Universität Dresden Flexible display-vorrichtung, verfahren zum stabilisieren mindestens einer geometrischen konfiguration einer flexiblen display-vorrichtung, rollbare projektionswand, und verfahren zum stabilisieren einer ausgerollten konfiguration einer rollbaren projektionswand

Citations (7)

* 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
GB2010637A (en) * 1977-11-26 1979-06-27 Sony Corp Diaphragm for loudspeaker
EP0034024A1 (fr) * 1980-02-01 1981-08-19 Sayre Swarztrauber Dispositif de message audio-visuel
DE3239597A1 (de) * 1982-10-26 1984-04-26 Marco Polo Industries & Merchandising Co., Ltd., Kowloon Toenende postkarte
GB2137560A (en) * 1983-03-31 1984-10-10 David Chung Musical greetings card
DE4117022A1 (de) * 1990-05-25 1992-02-13 Orex Ltd Sprachmitteilungskarte
WO1992003024A1 (fr) * 1990-08-04 1992-02-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Haut-parleur sous forme de panneau

Patent Citations (7)

* 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
GB2010637A (en) * 1977-11-26 1979-06-27 Sony Corp Diaphragm for loudspeaker
EP0034024A1 (fr) * 1980-02-01 1981-08-19 Sayre Swarztrauber Dispositif de message audio-visuel
DE3239597A1 (de) * 1982-10-26 1984-04-26 Marco Polo Industries & Merchandising Co., Ltd., Kowloon Toenende postkarte
GB2137560A (en) * 1983-03-31 1984-10-10 David Chung Musical greetings card
DE4117022A1 (de) * 1990-05-25 1992-02-13 Orex Ltd Sprachmitteilungskarte
WO1992003024A1 (fr) * 1990-08-04 1992-02-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Haut-parleur sous forme de panneau

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU756783B2 (en) * 1998-06-22 2003-01-23 Slab Technology Limited Loudspeakers
WO1999067974A1 (fr) * 1998-06-22 1999-12-29 Slab Technology Limited Haut-parleurs
WO2001067808A1 (fr) * 2000-03-07 2001-09-13 Slab Dsp Limited Haut-parleur avec suppression des bruits parasites
US10158337B2 (en) 2004-08-10 2018-12-18 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
US10848118B2 (en) 2004-08-10 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
US10666216B2 (en) 2004-08-10 2020-05-26 Bongiovi Acoustics Llc System and method for digital signal processing
US10848867B2 (en) 2006-02-07 2020-11-24 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
US11425499B2 (en) 2006-02-07 2022-08-23 Bongiovi Acoustics Llc System and method for digital signal processing
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Also Published As

Publication number Publication date
TR199800360T1 (xx) 1998-05-21
SK26598A3 (en) 1998-09-09
EA199800258A1 (ru) 1998-10-29
WO1997009841A3 (fr) 1997-05-01
IL123485A (en) 2001-01-11
PL182468B1 (pl) 2002-01-31
BR9610502A (pt) 1999-12-21
HK1008596A1 (en) 1999-05-14
CN1195460A (zh) 1998-10-07
EA000859B1 (ru) 2000-06-26
CZ58498A3 (cs) 1998-08-12
JPH11512248A (ja) 1999-10-19
IL123485A0 (en) 1998-09-24
PL325273A1 (en) 1998-07-20
DE69601724D1 (de) 1999-04-15
EP0847660B1 (fr) 1999-03-10
DE69601724T2 (de) 1999-09-16
RO119043B1 (ro) 2004-02-27
ES2130847T3 (es) 1999-07-01
HUP9900177A3 (en) 2001-08-28
DK0847660T3 (da) 1999-09-27
AU6880496A (en) 1997-03-27
NZ316546A (en) 1998-05-27
ATE177575T1 (de) 1999-03-15
EP0847660A2 (fr) 1998-06-17
HUP9900177A2 (hu) 1999-04-28
AU703015B2 (en) 1999-03-11

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