EP0847673B1 - Lecteur disque compact avec haut parleurs - Google Patents

Lecteur disque compact avec haut parleurs Download PDF

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Publication number
EP0847673B1
EP0847673B1 EP96929392A EP96929392A EP0847673B1 EP 0847673 B1 EP0847673 B1 EP 0847673B1 EP 96929392 A EP96929392 A EP 96929392A EP 96929392 A EP96929392 A EP 96929392A EP 0847673 B1 EP0847673 B1 EP 0847673B1
Authority
EP
European Patent Office
Prior art keywords
loudspeakers
disc player
portable compact
panel
lid
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
EP96929392A
Other languages
German (de)
English (en)
Other versions
EP0847673A2 (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=34865239&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0847673(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 EP0847673A2 publication Critical patent/EP0847673A2/fr
Application granted granted Critical
Publication of EP0847673B1 publication Critical patent/EP0847673B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H04R1/02—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops

Definitions

  • the invention relates to portable compact disc players and more particularly to such players incorporating loudspeakers comprising panel-form acoustic radiating elements.
  • US-A-5,349,575 of GOLDSTAR CO. discloses a portable compact disc player comprising a slim body and a pair of loudspeakers detachably hinged to the body.
  • 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 e.g. in the form of loudspeakers for portable compact disc players.
  • active acoustic devices e.g. in the form of loudspeakers for portable compact disc players.
  • 'compact disc' is intended to encompass analogous digitally encoded discs, such as for example digital video discs.
  • distributed mode radiators are intended to be characterised as in the above PCT application and/or otherwise as specifically provided herein.
  • the invention is a portable compact-disc player characterised by an opposed pair of panel-form loudspeakers, and in that each loudspeaker comprises 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 transducer means and having a transducer mounted wholly and exclusively 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.
  • the portable compact-disc player may comprise a body portion having a turntable and a lid adapted to close over the turntable, and the loudspeakers may be mounted to the lid.
  • the loudspeakers may be hinged to the lid.
  • the loudspeakers may each be housed in a slot in the lid for sliding movement between a stored position, in which the loudspeakers are substantially wholly housed in the slot, and a use position in which the loudspeakers are positioned on opposite sides of the lid.
  • Each radiator may comprise a stiff lightweight panel having a cellular core sandwiched by opposed skin layers. The radiator may be supported in a surrounding frame. A resilient suspension may be interposed between the frame and the radiator.
  • 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 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.
  • 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.
  • FIGs 3 to 6 illustrate a portable personal compact disc player (41) of the kind having a body (85) formed with a slot (82) through which discs are loaded into, and removed from the player and control buttons (137) by which the player is operated.
  • the player (41) is provided with an opposed pair of loudspeakers (81) in the form of thin panelform members (40) hinged to opposite sides of the player (41) to sandwich the player.
  • the loudspeakers (40) are sized to be co-extensive with the player and are arranged to be hinged from the closed position shown in Figure 3 to the extended position shown in Figure 4 as indicated by arrow 'C'. In the extended position, the body (85) of the player (41) tends to act as a central baffle separating the loudspeakers (40) to improve channel separation.
  • each of the panelform loudspeakers (40) is in the form of a distributed mode acoustic radiator of the kind described above with reference to Figure 1 and 2.
  • each loudspeaker comprises a rigid lightweight panel (2) formed from a cellular core (22) enclosed by skin layers (21), the panel being mounted in a surrounding resilient suspension (3), e.g. of foam rubber, which in turn is mounted in a lightweight rectangular frame (1) e.g. of plastics.
  • a transducer (9), e.g. of the kind described with reference to co-pending International publication Nos. WO97/09859, WO97/09861, WO97/09858 is mounted on each panel (2) to launch bending waves into the panel to cause the panel to resonate to produce an acoustic output.
  • the transducer (9) are positioned on the respective panels (2) in predetermined locations as discussed in our said International application No. (our file P.5711).
  • Figure 6 and 7 illustrate a portable compact disc player (41) of the kind comprising a body (85) carrying a turntable (86), operating buttons (137) and a lid (139) hinged as shown by arrow 'D' to close over the turntable.
  • the player (41) is provided with an opposed pair of loudspeakers (81) in the form of thin panelform members which as shown at (40) may be hinged to the sides of the lid (139) to be movable as indicated by arrow 'E' from a closed position (not shown) to the extended position shown.
  • the panelform loudspeakers (81) may be housed in a slot (not shown) in the lid (139) and slid as indicated by arrow 'F' between extended and retracted positions.
  • each of the panelform loudspeakers (39,40) is in the form of a distributed mode acoustic radiator of the kind described above with reference to Figure 1 and 2.
  • each loudspeaker comprises a rigid lightweight panel (2) formed from a cellular core (22) enclosed by skin layers (21), the panel being mounted in a surrounding resilient suspension (3), e.g. of foam rubber, which in turn is mounted in a lightweight rectangular frame (1) e.g. of plastics.
  • a transducer (9), e.g. of the kind described with reference to our co-pending International publication Nos. WO97/09859, WO97/09861, WO97/09858 is mounted on each panel (2) to launch bending waves into the panel to cause the panel to resonate to produce an acoustic output.
  • the transducer (9) are positioned on the respective panels (2) in predetermined locations as discussed in our co-pending International publication No. WO97/09842.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Packaging For Recording Disks (AREA)
  • Toys (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Claims (7)

  1. Un lecteur de disques compacts (41) portable, caractérisé par une paire de haut-parleurs (81) en forme de panneau, disposés de façon opposée et fixés au lecteur, et en ce que chaque haut-parleur comprend 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 à transducteur, et ayant un transducteur (9) monté complètement et exclusivement sur l'élément, à l'un des emplacements ou des sites, pour faire vibrer l'élément de façon qu'il résonne en formant un radiateur acoustique qui produit une émission acoustique lorsqu'il résonne.
  2. Un lecteur de disques compacts portable selon la revendication 1, caractérisé par une partie de corps (85) ayant un plateau tournant (86) et par un couvercle (139) adapté pour se fermer sur le plateau tournant, et en ce que les haut-parleurs (81) sont montés sur le couvercle.
  3. Un lecteur de disques compacts portable selon la revendication 2, caractérisé en ce que les haut-parleurs (81) sont articulés sur le couvercle.
  4. Un lecteur de disques compacts portable selon la revendication 2, caractérisé en ce que chacun des haut-parleurs (81) est logé dans une fente dans le couvercle (139), pour accomplir un mouvement coulissant entre une position de rangement, dans laquelle les haut-parleurs sont pratiquement entièrement logés dans la fente, et une position d'utilisation dans laquelle les haut-parleurs sont positionnés sur des côtés opposés du couvercle.
  5. Un lecteurs de disques compacts portable selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque radiateur (2) comprend un panneau rigide et léger ayant une âme cellulaire (22) intercalée entre des couches de peau (21) opposées.
  6. Un lecteur de disques compacts portable selon la revendication 5, caractérisé en ce que le radiateur (2) est supporté par un cadre (1) qui l'entoure.
  7. Un lecteur de disques compacts portable selon la revendication 6, caractérisé par une suspension élastique (3) interposée entre le cadre et le radiateur.
EP96929392A 1995-09-02 1996-09-02 Lecteur disque compact avec haut parleurs Expired - Lifetime EP0847673B1 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GBGB9517918.0A GB9517918D0 (en) 1995-09-02 1995-09-02 Acoustic device
GB9517918 1995-09-02
GB9522281 1995-10-31
GBGB9522281.6A GB9522281D0 (en) 1995-10-31 1995-10-31 Acoustic device
GB9606836 1996-03-30
GBGB9606836.6A GB9606836D0 (en) 1996-03-30 1996-03-30 Acoustic device
PCT/GB1996/002147 WO1997009856A2 (fr) 1995-09-02 1996-09-02 Lecteur de disque compact portatif

Publications (2)

Publication Number Publication Date
EP0847673A2 EP0847673A2 (fr) 1998-06-17
EP0847673B1 true EP0847673B1 (fr) 1999-03-10

Family

ID=34865239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96929392A Expired - Lifetime EP0847673B1 (fr) 1995-09-02 1996-09-02 Lecteur disque compact avec haut parleurs

Country Status (20)

Country Link
EP (1) EP0847673B1 (fr)
JP (1) JPH11512251A (fr)
AT (1) ATE177582T1 (fr)
AU (1) AU702999B2 (fr)
BR (1) BR9610545A (fr)
CA (1) CA2230104A1 (fr)
CZ (1) CZ57998A3 (fr)
DE (1) DE69601733T2 (fr)
DK (1) DK0847673T3 (fr)
EA (1) EA002018B1 (fr)
ES (1) ES2131955T3 (fr)
HK (1) HK1008626A1 (fr)
HU (1) HUP9903877A2 (fr)
IL (1) IL123480A (fr)
NZ (1) NZ316549A (fr)
PL (1) PL182495B1 (fr)
RO (1) RO119052B1 (fr)
SK (1) SK26098A3 (fr)
TR (1) TR199800364T1 (fr)
WO (1) WO1997009856A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0984659A2 (fr) * 1998-09-04 2000-03-08 Harman Audio Electronic Systems GmbH Panneau acoustique

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US5935522A (en) * 1990-06-04 1999-08-10 University Of Utah Research Foundation On-line DNA analysis system with rapid thermal cycling
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ATE303051T1 (de) 1998-06-22 2005-09-15 Slab Technology Ltd Lautsprecher
GB9827537D0 (en) * 1998-12-15 1999-02-10 Wharfedale International Limit Loudspeaker
EP1122974B1 (fr) * 2000-02-02 2007-01-24 Siemens Aktiengesellschaft Dispositif d'éclairage avec haut -parleur plat integré
DE10030746B4 (de) * 2000-06-23 2008-11-20 Lisa Dräxlmaier GmbH Innenverkleidungsteil für Fahrzeuge und verfahren zur Herstellung desselben
JP2003032781A (ja) * 2001-07-16 2003-01-31 Fps:Kk ポータブルサウンドステーション
DE10258183B3 (de) 2002-12-12 2004-07-29 Siemens Ag Slider-Mobiltelefon mit Biegewellenlautsprecher
US8284955B2 (en) 2006-02-07 2012-10-09 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
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
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
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
US10069471B2 (en) 2006-02-07 2018-09-04 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
DE102006060723B4 (de) * 2006-12-21 2010-05-27 Xounts Ag Anordnung mit durch Schwingungen betriebenen Klangkörpern
JP2010110011A (ja) * 2010-01-13 2010-05-13 Sony Corp スピーカを有する機器
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
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
GB2542714A (en) * 2014-05-01 2017-03-29 Brogan Hugh Speaker device
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
US9621994B1 (en) 2015-11-16 2017-04-11 Bongiovi Acoustics Llc Surface acoustic transducer
WO2017087495A1 (fr) 2015-11-16 2017-05-26 Bongiovi Acoustics Llc Transducteur acoustique de surface
US11211043B2 (en) 2018-04-11 2021-12-28 Bongiovi Acoustics Llc Audio enhanced hearing protection system
WO2020028833A1 (fr) 2018-08-02 2020-02-06 Bongiovi Acoustics Llc Système, procédé et appareil pour générer et traiter numériquement une fonction de transfert audio liée à la tête
USD973719S1 (en) * 2020-08-10 2022-12-27 Yang Fang CD player

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0984659A2 (fr) * 1998-09-04 2000-03-08 Harman Audio Electronic Systems GmbH Panneau acoustique
EP0984659A3 (fr) * 1998-09-04 2006-09-06 Harman Audio Electronic Systems GmbH Panneau acoustique

Also Published As

Publication number Publication date
HK1008626A1 (en) 1999-05-14
TR199800364T1 (xx) 1998-05-21
PL325274A1 (en) 1998-07-20
IL123480A0 (en) 1998-09-24
NZ316549A (en) 1998-05-27
JPH11512251A (ja) 1999-10-19
DE69601733T2 (de) 1999-09-16
DE69601733D1 (de) 1999-04-15
ES2131955T3 (es) 1999-08-01
DK0847673T3 (da) 1999-09-27
HUP9903877A2 (hu) 2000-03-28
PL182495B1 (pl) 2002-01-31
BR9610545A (pt) 1999-12-21
EA199800247A1 (ru) 1998-10-29
WO1997009856A3 (fr) 1997-05-01
AU702999B2 (en) 1999-03-11
RO119052B1 (ro) 2004-02-27
ATE177582T1 (de) 1999-03-15
AU6880796A (en) 1997-03-27
CA2230104A1 (fr) 1997-03-13
SK26098A3 (en) 1998-09-09
IL123480A (en) 2000-10-31
EP0847673A2 (fr) 1998-06-17
WO1997009856A2 (fr) 1997-03-13
CZ57998A3 (cs) 1998-07-15
EA002018B1 (ru) 2001-12-24

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