EP1705948A2 - Moteur d'un haut-parleur à diaphragm plat pour l'installation dans les parois et les plafonds - Google Patents

Moteur d'un haut-parleur à diaphragm plat pour l'installation dans les parois et les plafonds Download PDF

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Publication number
EP1705948A2
EP1705948A2 EP20060001921 EP06001921A EP1705948A2 EP 1705948 A2 EP1705948 A2 EP 1705948A2 EP 20060001921 EP20060001921 EP 20060001921 EP 06001921 A EP06001921 A EP 06001921A EP 1705948 A2 EP1705948 A2 EP 1705948A2
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EP
European Patent Office
Prior art keywords
flat membrane
plate
membrane
loudspeaker
drive
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.)
Withdrawn
Application number
EP20060001921
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German (de)
English (en)
Inventor
Heinz Jürgen Theis
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.)
Individual
Original Assignee
Individual
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 DE200520004730 external-priority patent/DE202005004730U1/de
Application filed by Individual filed Critical Individual
Publication of EP1705948A2 publication Critical patent/EP1705948A2/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a device having at least one drive, in particular with flat membrane loudspeaker membrane, and at least one plate-like element for installation in walls and ceilings and for sounding of rooms.
  • a corresponding drive in the first case a voice coil, is generally used according to the electrodynamic or piezoelectric principle, which is for example placed directly on a flat membrane material and connected to it in a non-positive or positive fit, for example as an adhesive connection.
  • the voice coil Upon excitation of the voice coil by an audio signal due to the interaction of the resulting magnetic field with a permanent magnetic field, the voice coil is excited to vibrate, so that their vibrations transmitted to the membrane and this is used as a sound radiating surface.
  • the term "material reduction" in the plate-like element is to be understood as meaning a reduction of the material thickness (viewed in cross section), in particular by means of milling, wherein at least one Part of the original material strength remains, especially in the form of a resulting frame, in which case such an embodiment is referred to by a so-called pocket milling.
  • the term "drive” is to be understood as any type of conceivable drive which correlates electrical signals to oscillations and thus to acoustic signals by energizing or applying voltage in accordance with the electrical signals, wherein exemplary and in particular electrodynamic drives via voice coils in magnetic fields or also piezoelectric drives are included.
  • flat membrane loudspeaker according to the invention is to be understood as a loudspeaker having at least one drive defined above, wherein at least one flat membrane is present at the same time, which is mechanically attacked by the drive so as to act as a sound transducer in this way Also so-called exciter in the sense of the invention is to be understood by it.
  • flat membrane speakers There are a variety of uses for these flat membrane speakers, which have been used for some time.
  • One of the main features of such flat membrane loudspeakers is, inter alia, that their flat membrane or its surface can be camouflaged or designed in such a way by applying these surface materials directly to the membrane surface of the flat membrane loudspeakers, examples of which include wood veneers, laminates, putty, paints, plasters etc. may be mentioned.
  • the flat membrane speakers have been manufactured as separate components and subsequently inserted into the respective environment. These speakers are sometimes relatively difficult to integrate as separate components and with great effort into the environment, in which they should ultimately be quasi "invisible".
  • flat membrane speakers in drywall constructions such as plasterboard, gypsum fiber u.ä. often usually the risk of cracking in the edge region of the speaker, since different materials with different properties, in particular different heat expansion coefficients, are filled with each other here. Therefore, when installing flat membrane speakers in the aforementioned materials, a considerable effort must be partially operated to prevent cracking.
  • the object of the present invention is to at least partially avoid the abovementioned problems, in particular a cost-effective one Possibility to make flat optics virtually "invisible” to integrate and at the same time to produce the corresponding devices cost with high reproducibility.
  • the device according to the invention has at least one drive, in particular with a flat membrane loudspeaker diaphragm, and at least one plate-like element for installation in walls and ceilings and for the sounding of rooms.
  • the plate-like element in the form of a plasterboard or gypsum fiber plate or expanded glass granule plate or gypsum-containing plate has a rear material reduction, for example in trough shape, in which the drive, in particular with flat membrane speaker membrane, is arranged.
  • the plate-like element undergoes a material reduction on the rear side at a certain area, for example by milling, so that at least part of the area formed by the material reduction functions at least partially as a front flat membrane.
  • the material reduction is adjusted to the respective requirements in terms of the vibration resistance of the material of the plate-like element, which is dimensioned for example in plasterboard panels as a material thickness of the flat membrane to a few millimeters.
  • bonded flat membrane speaker membrane is driven in particular by a voice coil drive, wherein the drive itself - ie without flat membrane speaker - also directly to the back of the flat membrane of the plate-like element, so that electrical signals via the electrodynamic transducer principle in movements of the flat membrane of the plate-like element on the flat membrane speaker membrane of the flat membrane speaker Vibrations and thus excited to a sound radiation. Due to the fixed edge clamping - it lacks here as in a conventional electrodynamic transducer a bead - the device of the invention thus acts as a bending wave converter.
  • the drive has a flat-diaphragm loudspeaker diaphragm, then this is particularly advantageous since an additional mechanical stabilization takes place here due to a more or less full-surface contact on the rear side of the front flat membrane of the plate-shaped element.
  • the type of material of the plate-like element is gypsum plasterboard, gypsum fiber or expanded glass granules in sheet form or gypsum-containing plates, which materials are initially unsuitable per se because of their mechanical properties (including a high fragility) in their material properties to act as a speaker diaphragm.
  • the at least one layer element With a suitable choice of the at least one layer element, it may even be possible in individual cases to equalize the loudspeakers audiophysiologically, without fine-tuning by means of additional equalizing filter networks.
  • plasterboard, gypsum fiber and expanded glass granules or gypsum-containing boards are not to be compared with wood, MDF, HDF or boards with appropriate wood veneer since these wood-like materials have different electroacoustic transmission properties per se.
  • Whatever kind of material reduction of wood panels can be designed so that very low material thicknesses are given in terms of material-reduced area without affecting the mechanical stability to the same extent as the inventive materials so strong.
  • flat membrane loudspeakers usually have a very low height, it is quite desirable with correspondingly high material thicknesses of the plate-like elements and thus advantageous that the flat membrane speaker is at least partially disposed in the material reduction, so that in the extreme case, the plate-like element with the flat membrane speakers directly on a Wall can be doubled without that more spacers are necessary.
  • the material reduction at least partially acts as a front flat membrane, wherein in extreme cases, the entire area formed by the material reduction acts as a flat membrane to have in this way the largest possible sound radiating surface.
  • the material reductions not only preferably rectangular but can take any geometric shape, for example, and in particular in the form of concentric circles, which serve to a kind of periodic damping of the vibrational excited areas of the front flat membrane of the plate-like element can.
  • the flat membrane speaker membrane is at least partially directly and / or indirectly connected to the back of the front flat membrane, in order in this way a corresponding coupling of the stimulated by the drive flat membrane speaker membrane with the front Flat membrane of the plate-like element to accomplish.
  • a direct connection is accomplished in particular, for example, by gluing and an indirect connection by means of resilient coupling, in which case the spring constant is to be tuned such that a cut-off frequency to be tuned is still taken into account.
  • connection is a rigid connection, in particular an adhesive connection, since the electroacoustic transmission properties are defined here and a high reproducibility can be ensured by the application of the adhesive.
  • the layer element is often a plate-shaped element, for example and in particular chipboard, MDF board, HDF board, plywood board, solid wood board , Plasterboard panel, gypsum fiber panel, mineral fiber panel, expanded glass granules panel, gypsum-containing panel, ferrous metal panel, non-iron metal panel, glass panel, pvc panel, polyamide panel, plexiglass panel, polyurethane foam panel as well as polycarbonate plate can act. It is possible that several plates in succession quasi doubled, so layered like each other, are.
  • the at least one layer element it is advantageous for the at least one layer element to have at least one material recess in such a way that the flat membrane loudspeaker membrane is at least partially connected directly to the rear side of the front flat membrane and / or to the rear side of a further layer element arranged therebetween, since in this way a variety of degrees of freedom for setting the desired Transmission properties is given.
  • the flat membrane loudspeaker has at least two drives, in particular if the drives are connected to different areas of the flat membrane loudspeaker diaphragm, in order to influence in this way the radiation behavior of the front flat membrane of the plate-like element in a desired direction, for example, as a quasi-multipath system.
  • the device according to the invention has at least one rear wall element, wherein the rear wall element may have at least one material recess, for example for receiving the flat membrane loudspeaker, resulting in an additional mechanical stabilization of the whole.
  • the device according to the invention has at least one frame element, wherein the frame element may also have at least one material recess, for example, to provide space for cable feeds.
  • the frame element itself may consist of several parts, but is usually circumferential and thus provides a high degree of mechanical stabilization.
  • the frame member and / or the flat membrane speaker functions as a mechanical stabilization of the transition region between the mechanically weakened by the material reduction area and the non-weakened region of the plate-like element, in order in this way also in terms of harsh handling a stable embodiment in the To hold hands.
  • the plate-like element in particular the region of the front flat membrane, with at least one material recess, in particular if the material recess is designed as a perforation, is provided.
  • the front side of the plate-like element is uneven in order to achieve certain non-uniform and aperiodic dampening or intentional radiation characteristics.
  • the plate-like element is designed as a room acoustic element, in particular if the plate-like element is sound-absorbing.
  • the plate-like element is sandwiched, and it is particularly advantageous if the plate-like element at least a core and at least one cladding layer, wherein in particular the core of metal, for example of a Cu wire mesh fabric, and / or the cladding layer of plasterboard, also serving to shield electromagnetic fields serving.
  • the device according to the invention generally has a thickness (material thickness) of a few millimeters to a few centimeters with respect to the plate-like element, the dimensions of centimeters by centimeters being able to go as far as the meter range, that is, for example, a plate-like element having a dimension of 80 sometimes 120 centimeters and a material thickness of 5 centimeters.
  • the device according to the invention allows a crack-free design with predictable acoustic parameters and a high acoustic quality.
  • FIG. 1 shows a device according to the invention with a plate-like element 1 in the form of a plasterboard with a material thickness 12 of several millimeters, in which two flat membrane loudspeakers 6, 13 are excited in two material reductions 17 in the form of so-called exciters, ie as a rule by means of voice coils Ring surfaces, which are usually designed very small and can be applied to vibratory materials, and then to transmit the vibration energy generated by the vibrations generated vibration on the vibratory material, directly on the backs 18 of the resulting material by the reduction 17 front flat membranes 5 applied.
  • exciters ie as a rule by means of voice coils Ring surfaces
  • the material reductions 17 amount to a few millimeters, so that the flat membrane loudspeakers 6, 13 are accommodated with their associated flat membrane loudspeaker membranes 16 (not shown) within the material reductions 17.
  • FIG. 2 shows a modified embodiment in which, between the flat membrane loudspeaker diaphragms 16 (not shown), the flat membrane loudspeakers 6, 13 are placed on a plate-like layer element 7 are glued in the form of an iron plate, which in turn can be embedded in the material reduction 17 of the plate-shaped element 1 and is glued directly to the back 18 of the front flat membrane 5 of the plate-shaped element 1.
  • two flat membrane loudspeakers 6, 13 in the form of exciters with their respective flat membrane loudspeaker diaphragms 16 are accommodated in the material reduction 17 of the plate-like element 1.
  • FIG. 3 shows a cross-section of a plate-like element 1 which has a material reduction 17, in which two flat-diaphragm loudspeakers 6, 13 or the abovementioned exciters, which, strictly speaking, also represent loudspeaker systems in which the corresponding voice coil has a flat membrane with a size of the voice coil is provided on the back 18 of the front flat membrane 5 are each adhesively attached via their flat membranes 16.
  • the drives voice coils as such
  • exciter or the classic flat membrane speakers 6, 13 by applying electrical signals, the converted corresponding respective vibrations directly to the front flat membrane, which acts in this case of flat membrane speaker membrane, applied.
  • FIG. 4 shows a modified embodiment in which the two drives or flat membrane loudspeakers 6, 13 are not applied directly on the rear side 18 of the front flat membrane but via a plate-like intermediate layer 7 in the form of a copper plate. Due to the special acoustic properties of the copper plate becomes a whole generates certain frequency-dependent amplitude behavior to increase, for example, the speech intelligibility.
  • FIG. 5 again shows a further modification to the embodiment shown in FIG. 4, in which the two drives or flat membrane loudspeakers 6, 13 with their respective flat membrane loudspeaker diaphragms 16 are applied directly to the rear side of the front flat membrane 5, but between the two Drives or flat diaphragm loudspeakers 6, 13 further plate-like intermediate layers 17 are arranged polyurethane foam to decouple the respective vibrations from each other strongly dampening.
  • FIG. 6 shows a further embodiment to that shown in FIG. 4, in which, as compared to the intermediate layer 7 shown in FIG. 4, a further intermediate layer 15, here made of solid wood, is arranged in order to modify the acoustic properties again.
  • FIG. 7 illustrates an embodiment modified from FIG. 5, in which a further intermediate layer in the form of a plurality of plate-like sections 15 between the two drives or flat membrane loudspeakers 6, 13, here made of polyurethane foam, is arranged in comparison to perform a dampening decoupling.
  • FIG. 8 shows a further modification of the previous embodiments, in which a first drive or flat-panel loudspeaker 6 is connected via a first intermediate layer 7 to the rear side 18 of the front flat membrane 5 and a second drive or flat-panel loudspeaker 13 directly via its flat membrane loudspeaker diaphragm 16 is connected to the rear side 18 of the front flat membrane 5, wherein the two drives or flat diaphragm loudspeakers 6, 13 are attenuating decoupled over several parts of a further intermediate layer 15, which consist of polyurethane foam.
  • a device according to the invention is shown in perspective, comprising a plate-like element 1, wherein a not shown flat diaphragm speaker 6, 13 or drive is embedded in a corresponding material reduction and this back with a rear wall element 9, which has a material recess 14, is completed on the back ,
  • the rear wall element 9 serves for further mechanical stabilization and fixation of the flat membrane loudspeaker or of the drive.
  • FIG. 11 An embodiment of the device according to the invention is shown in sketchy detail in FIG. 11, in which two flat-diaphragm loudspeakers 6, 13 or drives are adhesively applied to an intermediate layer 15 via their flat membrane loudspeaker membranes 16, wherein between the front flat membrane 5 and the intermediate layer 15 a further intermediate layer element 7 is arranged.
  • a frame member 10 circumferentially supports the rear wall element 9 and serves to space the rear wall element 9 to the flat membrane loudspeakers 6, 13 or the drives and at the same time to further mechanical Stabilization of the round area of material reduction.
  • the front flat membrane 5 at two points perforations 19, which serve to provide a specific radiation behavior on the one hand and a corresponding power spectrum.
  • Figure 12 shows a sketch in cross-section of another embodiment in which the frame member 10 directly on the back 18 of the front flat membrane 5 touches and at the same time another layer element 7 between the flat membrane speakers 6, 13 and their flat membrane speakers 16 and the drives is arranged.
  • FIG 13 a further embodiment is sketchily shown in cross section, in which the frame member 10 directly on the back 18 of the front flat membrane 5 touches, with two flat-panel speakers 6, 13 or their flat membrane loudspeaker Mebranen 16 or the drives directly adhesive to the back 18 of front flat membrane 5 are connected.
  • FIG 14 a further embodiment is sketchily shown in cross-section, in which the frame member 10 directly on the intermediate member 15 touches, which in turn is arranged on an intermediate element 7 and this then directly touches the back 18 of the front flat membrane 5.
  • the two flat membrane loudspeakers 6, 13 or their flat membrane loudspeaker diaphragms 16 or the drives are adhesively connected directly to the intermediate element 15.
  • FIG 15 a further embodiment is sketchily shown in cross-section, in which the frame member 10 both on the back of the plate-like element 1 and on the back 18 of the front Flat membrane 5 touches down, wherein the two flat-panel speakers 6, 13 and their flat membrane loudspeaker membranes 16, and their drives are directly adhesively connected to the back 18 of the front flat membrane 5.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP20060001921 2005-03-21 2006-01-31 Moteur d'un haut-parleur à diaphragm plat pour l'installation dans les parois et les plafonds Withdrawn EP1705948A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200520004730 DE202005004730U1 (de) 2005-03-21 2005-03-21 Unsichtbar in Plattenwerkstoffe integrierter Flächenlautsprecher
DE102005047300A DE102005047300A1 (de) 2005-03-21 2005-09-30 Mindestens einen Antrieb, insbesondere mit Flachmembran-Lautsprechermembran, und mindestens ein plattenartiges Element aufweisende Vorrichtung zum Einbau in Wänden und Decken und zur Beschallung von Räumen

Publications (1)

Publication Number Publication Date
EP1705948A2 true EP1705948A2 (fr) 2006-09-27

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EP20060001921 Withdrawn EP1705948A2 (fr) 2005-03-21 2006-01-31 Moteur d'un haut-parleur à diaphragm plat pour l'installation dans les parois et les plafonds

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EP (1) EP1705948A2 (fr)
DE (1) DE102005047300A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100814A1 (de) * 2013-01-28 2014-07-31 Pursonic Gmbh Lautsprechersystem zur Integration in eine Wand- oder Deckenoberfläche

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006039453A1 (de) * 2006-08-23 2008-03-13 Puren Gmbh Flächenlautsprechervorrichtung
DE102014000921B4 (de) 2014-01-28 2017-03-16 Liliya Theis Flächenlautsprecher und Verfahren zu dessen Herstellung
EP3836559B1 (fr) 2019-12-09 2024-08-21 Theis, Liliya Haut-parleur plat

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100814A1 (de) * 2013-01-28 2014-07-31 Pursonic Gmbh Lautsprechersystem zur Integration in eine Wand- oder Deckenoberfläche

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DE102005047300A1 (de) 2006-10-05

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