EP1883270A3 - Panel loudspeaker with a voice coil - Google Patents

Panel loudspeaker with a voice coil Download PDF

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Publication number
EP1883270A3
EP1883270A3 EP07113001A EP07113001A EP1883270A3 EP 1883270 A3 EP1883270 A3 EP 1883270A3 EP 07113001 A EP07113001 A EP 07113001A EP 07113001 A EP07113001 A EP 07113001A EP 1883270 A3 EP1883270 A3 EP 1883270A3
Authority
EP
European Patent Office
Prior art keywords
voice coil
intensity
rigid element
loudspeaker
oscillations
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Withdrawn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
EP07113001A
Other languages
German (de)
French (fr)
Other versions
EP1883270A2 (en
Inventor
Robert Bösnecker
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1883270A2 publication Critical patent/EP1883270A2/en
Publication of EP1883270A3 publication Critical patent/EP1883270A3/en
Withdrawn legal-status Critical Current

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
    • 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
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/05—Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels

Abstract

Die Erfindung betrifft einen Flächenlautsprecher (1) mit einem flächigen biegesteifen Element (2) und mit mindestens einer Schwingspule (3), die durch Audiosignale einer Signalquelle (4) elektrisch zu Schwingungen angeregt diese Schwingungen auf das biegesteife Element (2) zur Ausbildung von transversalen Biegeschwingungen des biegesteifen Elementes (2) und damit zur Schallabgabe überträgt, wobei die Schwingspule (3) ein Magnetfeld mit einer ersten Intensität (I1) am Ort der Schwingspule (3) und auf der der Schwingspule (3) gegenüberliegenden Oberfläche des biegesteifen Elements (2) ein Streufeld mit einer zweiten Intensität (I2) hervorruft. Bei Einsatz einer solchen Anordnung in einer mit Metallstaub belasteten Umgebung zeichnen sich beispielsweise kreisförmige schwarze Ringe auf der Oberfläche des Flächenlautsprechers (1) ab. Durch ein Reduzierungsmittel, durch das die zweite Intensität (I1) zumindest auf die Hälfte der ersten Intensität (I2) abgeschwächt ist, wird die Aufgabe der Vermeidung solcher Ringe, beispielsweise auf Flächenlautsprechern als Werbefläche, gelöst.

Figure imgaf001
The invention relates to a flat loudspeaker (1) having a planar rigid element (2) and having at least one voice coil (3) electrically excited by audio signals of a signal source (4) to vibrate these oscillations on the rigid element (2) to form transversal oscillations Bending vibration of the rigid element (2) and thus transmits to the sound output, wherein the voice coil (3) has a magnetic field with a first intensity (I1) at the location of the voice coil (3) and on the voice coil (3) opposite surface of the rigid element (2 ) causes a stray field with a second intensity (I2). When using such an arrangement in an environment contaminated with metal dust, for example, circular black rings are visible on the surface of the area loudspeaker (1). By a reduction means by which the second intensity (I1) is attenuated to at least half of the first intensity (I2), the object of avoiding such rings, for example on surface loudspeakers as advertising space, is achieved.
Figure imgaf001
EP07113001A 2006-07-28 2007-07-24 Panel loudspeaker with a voice coil Withdrawn EP1883270A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610035010 DE102006035010A1 (en) 2006-07-28 2006-07-28 Flat speaker with a voice coil

Publications (2)

Publication Number Publication Date
EP1883270A2 EP1883270A2 (en) 2008-01-30
EP1883270A3 true EP1883270A3 (en) 2011-06-22

Family

ID=38659404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07113001A Withdrawn EP1883270A3 (en) 2006-07-28 2007-07-24 Panel loudspeaker with a voice coil

Country Status (2)

Country Link
EP (1) EP1883270A3 (en)
DE (1) DE102006035010A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6003766A (en) * 1995-09-02 1999-12-21 New Transducers Limited Vending machine
WO2006078247A1 (en) * 2005-01-21 2006-07-27 Brookstone Purchasing, Inc. Speaker having a transparent panel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707741A1 (en) * 1987-03-11 1988-09-22 Blaupunkt Werke Gmbh SPEAKER

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6003766A (en) * 1995-09-02 1999-12-21 New Transducers Limited Vending machine
WO2006078247A1 (en) * 2005-01-21 2006-07-27 Brookstone Purchasing, Inc. Speaker having a transparent panel

Also Published As

Publication number Publication date
DE102006035010A1 (en) 2008-02-07
EP1883270A2 (en) 2008-01-30

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