EP0984659A2 - Panneau acoustique - Google Patents

Panneau acoustique Download PDF

Info

Publication number
EP0984659A2
EP0984659A2 EP99114407A EP99114407A EP0984659A2 EP 0984659 A2 EP0984659 A2 EP 0984659A2 EP 99114407 A EP99114407 A EP 99114407A EP 99114407 A EP99114407 A EP 99114407A EP 0984659 A2 EP0984659 A2 EP 0984659A2
Authority
EP
European Patent Office
Prior art keywords
segments
baffle
sound
reproduction
segment
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.)
Granted
Application number
EP99114407A
Other languages
German (de)
English (en)
Other versions
EP0984659B1 (fr
EP0984659A3 (fr
Inventor
Wolfgang Dr. Bachmann
Gerhard Dr. Krump
Hans-Jürgen Regl
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.)
Harman Becker Automotive Systems GmbH
Original Assignee
Harman Becker Automotive Systems GmbH
Harman Audio Electronic Systems GmbH
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
Application filed by Harman Becker Automotive Systems GmbH, Harman Audio Electronic Systems GmbH filed Critical Harman Becker Automotive Systems GmbH
Publication of EP0984659A2 publication Critical patent/EP0984659A2/fr
Publication of EP0984659A3 publication Critical patent/EP0984659A3/fr
Application granted granted Critical
Publication of EP0984659B1 publication Critical patent/EP0984659B1/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
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • 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 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • 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
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
    • H04R2201/021—Transducers or their casings adapted for mounting in or to a wall or ceiling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/01—Acoustic transducers using travelling bending waves to generate or detect sound
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Definitions

  • the invention is concerned with the formation of baffles, in particular with such baffles that are used for sound reinforcement at large events can be used.
  • the respective baffle has at least one segment of which sound waves are emitted from the reproduction plane of the baffle is a very compact, space-saving and lightweight arrangement for Sound transmission created, which not only the area or space required the size of the respective baffle is reduced, but by the Lining up of other baffles can be expanded as required and attached to the prevailing conditions is adaptable. Also with the baffles according to the invention enable outstanding low-frequency reproduction, since segments designed as bass plates already have an edge length of about 2.30 m frequencies close to the hearing limit without problems with considerable sound pressure can radiate.
  • the respective segments of a baffle on their Edges coupled together by means of connecting elements the different segments of a baffle can not only be called - Range emitters optimized for a limited frequency range become. Rather, the coupled connection of the different Segments and the targeted use of appropriate connecting elements, that the connecting elements provide a mechanical filter or in this Work wisely and at the same time through the mutual Influences between the segments support their effects and complete.
  • the realization of a coupled connection between the segments is particularly simple if the segments consist of a core layer and at least one cover layer.
  • the respective connection between the segments can be realized by means of the one or more cover layers and / or the core layer, in that the respective cover layer and / or the core layer also bridges the radial distances between adjacent segments.
  • the use of the core layer as a connection between a plurality of segments is particularly advantageous because in this case the different segments can be formed very easily by segmenting the respective core layer by means of corresponding cutouts and the areas of the core layer weakened by the cutouts as coupled connections be used.
  • the segments or Sound radiation segments do not necessarily have a uniform surface area in the reproduction level of the baffle can have by their design and mutual assignment the sound reproduction of the respective baffle be designed very flexibly.
  • the segments are mainly in the central area of the baffle Bass reproduction significantly improved since the side to the bass transmission provided segments adjoining segments or parts of the baffle without further effort at the same time to contain the dipole short circuit can be used.
  • a further optimization of the sound reproduction is given if according to Claim 6 optimized for the reproduction of certain frequency ranges trained sound reproduction segments of a baffle perpendicular to Rendering layer have a different depth. So it turned out emphasized that the bass reproduction is particularly good when the respective Bass segment a very compared to the mid or high range segments has shallow depth.
  • the respective sound radiation segment with at least one Incision which is the depth of the core layer transverse to its The low-frequency resonances are reduced in certain areas of such a sound emission segment into a multitude of weaker, mutually disgruntled resonances split, thereby simultaneously Natural frequency density and the resonance density increase.
  • the application of these cuts does not apply the application within a multiple sound emission segments Baffle is limited, but also with individually set up Sound radiation segments can be realized.
  • Baffles Due to the essentially flat or slightly curved design of the Direction of the listening room facing playback levels of the invention Baffles are provided, which are characterized by appropriate Have the design marketed in the form of imprints as an advertising medium.
  • a baffle 10 which consists of a plurality of segments 11 is formed.
  • the formed by the segments 11 and in the direction of The listening level 31 facing playback level 30 is optical perceptible design 12 in the form of an advertising print.
  • each of the segments 11 shown in FIG. 1 is a sound radiation segment 11 ' educated. As already in connection with DE-A-19757097.6, which is also made the subject of the present application, is executed, each sound radiation segment 11 'is covered by a light core layer 13 (FIG. 3a) and at least one cover layer 14 (FIG. 3a), the respective used cover layers 14 made of a material with a particularly high Expansion wave speed exist and with the surfaces of the core layer 13 are connected, each of which has the largest surface dimensions Have core layer 13.
  • baffle 10 is completely flat. But that's not all Committed to this design. Rather, it can be in another Embodiment related to the baffle 10 or its reproduction level 30 at least partially to a fixed point 31 'assumed in the listening room 31 be convex or concave.
  • baffle 10 with sound steel segments 11 ' can in another - not shown - embodiment in the baffle 10 also segments 11 can be integrated, which are not considered Sound radiation segments 11 'are formed.
  • Such (blind) segments 11 can for attaching and supporting the projection screens 10 on the respective Installation site.
  • a baffle 10 is also shown in FIG. 2 as a second exemplary embodiment shown, all of which segments 11 are designed as sound radiation segments 11 ' are.
  • the Sound emission segments 11 'according to FIG. 2 of different sizes Area dimensions in the rendering plane 30.
  • the largest by far Sound emission segment 11 ′ is in the central region of the baffle 10 arranged.
  • This sound reproduction segment 11 ' is for reproduction low-frequency sound events optimized.
  • 16 of the baffle 10 is a row of six Sound steel segments 11 'placed, which are each the smallest Have surface area in the display plane 30 and for radiation high-frequency sound events are used.
  • a sound emission segment 11 ' is provided, which lies between the sound emission segments 11 'just mentioned Has surface area and for the reproduction of medium-frequency sound events serves.
  • the Low-frequency reproduction is not necessary in the middle of the baffle 10 arranged sound emission segment 11 'must be limited. Rather, in another - not shown - embodiment for playback low-frequency tones the middle area of a baffle 10 or the entire baffle with a variety of not necessarily symmetrical mutually arranged sound radiation segments 11 'may be provided. Also at this modification is essential that the or the (bass) segments 11 'to Avoiding acoustic short circuits, for example from other segments 11 or 11 '. For the same reasons, it is also necessary that the or the respective (bass) segments 11 'at least with the immediate Adjacent segments 11, 11 'via connecting elements 19, 20 connected that are impermeable to sound waves.
  • connection between the (blind) segments or sound emission segments 11 ' is shown in more detail in FIGS. 3a to 3e.
  • FIG. 3a shows two core layers 13 arranged next to one another, wherein There is a mutual distance A between the core layers 13.
  • the two Surfaces of the two core layers 13 shown, which are the largest Have surface area are each connected to a cover layer 14.
  • There the upper and lower cover layers 14 for both segments 11 shown in FIG. 3a (11 ') is formed as a common cover layer 14, of these Cover views 14 at the same time that separating the two segments 11 (11 ') Distance A covered.
  • the two cover layers 14 for better representation of the conditions have a small distance from the respective surfaces of the core layers 13.
  • 3b shows two core layers 13, each with one or two cover layers 14 (not shown in FIG. 3b) are provided.
  • the two in FIG Figure 3b shown strips 19 for connecting the two segments 11 (11 ') also direct, i.e. before the application of the cover layers 14 to the core layers 13 be stuck on.
  • the two cover layers 14 can also be like already explained in connection with FIG. 3a for both core layers 13 be formed consistently, so that then the respective connection between the two segments 11 (11 ') from a strip 19 and a strip 19 covering cover layer 14.
  • the strips 19 can also in thickness the strip 19 has milled grooves (not shown) in the core layers 13 be let in.
  • the exemplary embodiment according to FIG. 3c differs from the embodiment 3b only in that the narrow sides 21 of the two core layers 13 are additionally connected to a connecting element 20.
  • the strips 19 not only have a uniform function Manufacture surface design between two segments 11 (11 '), but also determine through the interaction with the connecting element 20 about the degree of the desired coupling between the two segments 11 (11 ').
  • FIG. 3d there is a uniform one for the two segments 11 (11 ') Core layer region 13 'shown.
  • this core layer region 13 ' has two trapezoidal cutouts 22 which is the thickness of the same for both segments 11 (11 ') Weak core layer area 13 'and thus separate to some extent.
  • the remaining part acts between the two segments 11 (11 ') simultaneously as a connecting element 20 i.S.d. Representation according to FIG. 3c.
  • the two segments 11 (11 ') can be used to produce one uniform surface design with the cutouts 22 covering Cover layers 14 may be provided.
  • FIG. 3e shows a further embodiment of a connection between two (Blind) segments 11 or sound radiation segments 11 '. They are here too two core layers 13 provided on both sides with cover films 14.
  • the connection between the two segments 11, (11 ') has one of the Cover layers 14 one over the narrow sides 21 of the core layer 13 projecting area 14 'on these projecting areas 14' of Cover views 14 can - as shown in Figure 3e - to produce a Connection between two segments 11 (11 ') can be used by the protruding area 14 'of one segment 11 (11') with the cover layer 14 of the other segment 11 (11 ') is connected.
  • segments 11 (11 ') are connected, that segments 11 (11 ') formed from the core layer 13 and cover layers 14 easily produced in large quantities and using the protruding ones Areas 14 'can be connected to each other with little effort. If the connection between two for optical or acoustic reasons Segments 11 (11 ') on both sides of the distance A can be formed the respective segment 11 (11 ') also with two projecting areas 14' be provided. The latter is dashed for the right segment 11 (11 ') shown.
  • connection between two Segments 11 (11 ') should at least then be designed to be soundproof, if one of the segments 11 (11 ') thus fastened with a Sound emission segment 11 'is connected, which for low-frequency reproduction is inserted. Because only through a soundproof connection ensures that acoustic short circuits are avoided.
  • FIG. 4 shows the rear view of one of three sound emission segments 11 ' formed baffle 10 shown.
  • This representation can be clearly seen that the different sound emission segments 11 'in addition to a different and already explained in connection with Figure 2 area expansion a different depth perpendicular to the playback plane 30 of the Baffle 10 can have.
  • This different depth of the different Sound emission segments 11 ' are used to optimize sound reproduction certain areas of the baffle 10.
  • the different sound emission segments 11 'combined so that the different depths of the sound emission segments 11 'only at the back of the Effect baffle 10, the front surface of the not visible in Figure 4 remains Baffle 10 obtained as a profile-free reproduction level 30.
  • Notches 32 may be provided to produce low frequency resonances in a variety split weaker, mutually out of tune resonances. Such an incision is shown on the middle segment 11 'in FIG. 4. Only the For the sake of completeness, it should be pointed out that the incision shown in FIG. 4 32 is not limited to the shape illustrated there, but in other embodiments according to the respective needs too can be wedge-shaped or stair-shaped.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
EP99114407A 1998-09-04 1999-07-22 Panneau acoustique Expired - Lifetime EP0984659B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19840375 1998-09-04
DE19840375A DE19840375C2 (de) 1998-09-04 1998-09-04 Schallwand

Publications (3)

Publication Number Publication Date
EP0984659A2 true EP0984659A2 (fr) 2000-03-08
EP0984659A3 EP0984659A3 (fr) 2006-09-06
EP0984659B1 EP0984659B1 (fr) 2008-02-27

Family

ID=7879823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99114407A Expired - Lifetime EP0984659B1 (fr) 1998-09-04 1999-07-22 Panneau acoustique

Country Status (3)

Country Link
US (1) US6170603B1 (fr)
EP (1) EP0984659B1 (fr)
DE (2) DE19840375C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2023654A1 (fr) * 2007-07-23 2009-02-11 Knauf AMF GmbH & Co. KG Haut-parleur en plaques
WO2009106427A1 (fr) * 2008-02-27 2009-09-03 Siemens Aktiengesellschaft Haut-parleur plan

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821862A1 (de) * 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Schallwiedergabeanordnung
DE19821855A1 (de) 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Plattenlautsprecher
DE19825866A1 (de) 1998-06-10 1999-12-16 Nokia Deutschland Gmbh Plattenlautsprecher
DE19843079A1 (de) 1998-09-19 2000-03-23 Nokia Deutschland Gmbh Multiresonanzplatte
DE10001410C2 (de) * 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flachlautsprecheranordnung
US20050175209A1 (en) * 2004-02-09 2005-08-11 Madison Fielding, Inc. Integrated Speaker Device
GB2451259B (en) * 2007-07-25 2011-07-20 Gp Acoustics Loudspeaker
US7787645B2 (en) * 2007-11-30 2010-08-31 Clair Brothers Audio Systems Inc. Loudspeaker-transducer array
PT3406086T (pt) 2016-01-22 2020-06-26 Glauk S R L Método e aparelho para reproduzir áudio por meios de transdutores acústicos planares
US10580396B1 (en) 2017-04-07 2020-03-03 The United States Of America As Represented By The Secretary Of The Navy Acoustically stiff wall
DE102021124624A1 (de) * 2021-09-23 2023-03-23 LiMES - Immersive Solutions GmbH Schallwand

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0847673B1 (fr) * 1995-09-02 1999-03-10 New Transducers Limited Lecteur disque compact avec haut parleurs
EP0847670B1 (fr) * 1995-09-02 1999-03-10 New Transducers Limited Ecrans de presentation comprenant des haut-parleurs
WO1999060818A1 (fr) * 1998-05-15 1999-11-25 Harman Audio Electronic Systems Gmbh Haut-parleur a panneaux
WO1999060444A1 (fr) * 1998-05-15 1999-11-25 Harman Audio Electronic Systems Gmbh Ecran de projection

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US3696885A (en) * 1971-08-19 1972-10-10 Electronic Res Ass Decorative loudspeakers
US4778027A (en) * 1987-04-30 1988-10-18 Taylor Mildred E Rhythmizer
US4928312A (en) * 1988-10-17 1990-05-22 Amel Hill Acoustic transducer
WO1995014296A1 (fr) * 1993-11-18 1995-05-26 Sound Advance Systems, Inc. Haut-parleur ameliore a diaphragme plan
CA2139151A1 (fr) * 1994-01-14 1995-07-15 Amin M. Hanafy Reseau acoustique bidimensionnel et sa methode de fabrication
DE69519105T2 (de) 1994-02-26 2001-04-05 Sony Corp Plattenladegerät für ein Plattenwechselsystem
ATE211571T1 (de) * 1994-06-24 2002-01-15 Advanced Tech Lab Diagnoseultraschallwandleranordnung mit elevationsfokus
DE4426696C1 (de) * 1994-07-18 1996-01-04 Thorsten Dipl Ing Schippritt Elektroakustischer Wandler zur Aufnahme oder Wiedergabe stereophonischer Signale
DE19757097B4 (de) 1997-12-20 2004-04-15 Harman Audio Electronic Systems Gmbh Schallwiedergabeanordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0847673B1 (fr) * 1995-09-02 1999-03-10 New Transducers Limited Lecteur disque compact avec haut parleurs
EP0847670B1 (fr) * 1995-09-02 1999-03-10 New Transducers Limited Ecrans de presentation comprenant des haut-parleurs
WO1999060818A1 (fr) * 1998-05-15 1999-11-25 Harman Audio Electronic Systems Gmbh Haut-parleur a panneaux
WO1999060444A1 (fr) * 1998-05-15 1999-11-25 Harman Audio Electronic Systems Gmbh Ecran de projection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2023654A1 (fr) * 2007-07-23 2009-02-11 Knauf AMF GmbH & Co. KG Haut-parleur en plaques
WO2009106427A1 (fr) * 2008-02-27 2009-09-03 Siemens Aktiengesellschaft Haut-parleur plan

Also Published As

Publication number Publication date
EP0984659B1 (fr) 2008-02-27
DE19840375C2 (de) 2003-08-28
DE59914664D1 (de) 2008-04-10
US6170603B1 (en) 2001-01-09
DE19840375A1 (de) 2000-03-09
EP0984659A3 (fr) 2006-09-06

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