EP1800513A1 - Systeme de haut-parleurs dans un vehicule - Google Patents

Systeme de haut-parleurs dans un vehicule

Info

Publication number
EP1800513A1
EP1800513A1 EP05790085A EP05790085A EP1800513A1 EP 1800513 A1 EP1800513 A1 EP 1800513A1 EP 05790085 A EP05790085 A EP 05790085A EP 05790085 A EP05790085 A EP 05790085A EP 1800513 A1 EP1800513 A1 EP 1800513A1
Authority
EP
European Patent Office
Prior art keywords
loudspeaker
arrangement according
loudspeaker arrangement
speakers
loudspeakers
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.)
Ceased
Application number
EP05790085A
Other languages
German (de)
English (en)
Inventor
Holger Opfer
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP1800513A1 publication Critical patent/EP1800513A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

  • the invention relates to a loudspeaker arrangement in a motor vehicle.
  • Speaker arrangements in a motor vehicle have been known for a long time and serve primarily for the emission of audio signals.
  • the audio sources are, for example, radios, CD, MP3 or DVD players.
  • the speakers are increasingly used for emitting acoustic information, for example, a navigation system and / or a parking assistance system.
  • Conventional loudspeakers in a motor vehicle are constructed as electrodynamic loudspeakers with permanent magnets. These are relatively bulky and heavy, which often leads to compromises between installation location and radiation characteristics due to the limited space in a motor vehicle.
  • a method for improving the communication in a vehicle wherein the voice signals of the occupants of a vehicle are recorded individually for each occupant via a microphone assigned to him within the framework of his seat, wherein the recorded voice signals are separated for each occupant amplified in an input stage and filtered for start level minimization and frequency adjustment, wherein the amplified and filtered voice signals of each occupant for splitting on the output channels and thus to the distribution on the individual components of a speaker consisting of speech output device, depending on the local assignment of the microphone in the vehicle, via which the speech signal was recorded and in dependence on the local assignment of each individual speaker of the speech output device in the vehicle, via which the speech signal is to be output, via a summation and distribution stage an individual for each output channel signal processing in the form of a time correction and a level differentiation is subjected and the assignment of the individually processed for each output channel speech signal to the individual output channels and thus to the individual speakers of the speech output device takes place via a matching stage in which via a
  • the microphones can be designed as directional microphones. Furthermore, a use as a telephone device with free allocation of participants within the vehicle is proposed. When used in the context of telephone processes, a conversation can be assigned, for example, to every seat and thus to every occupant due to the structure of the device. The playback can be controlled via selected speakers, so that even selected occupants of the vehicle can be involved in the telephone conversation. At the same time, listening in certain places can be restricted. This happens because the incoming signal is switched to appropriately selected speakers and treated as a fictional or virtual voice source. The outgoing signal or signals are subjected to the same process as the signal used for internal communication. A spin-off of certain places or areas from both the recording and the playback side can also be set via the operating units of the control unit.
  • an acoustic element comprising at least two porous layers which are electrically conductive or metallized on one side.
  • an insulated plastic layer is arranged, which is preferably formed in two layers, wherein between the two layers is a metallic coating over which the plastic layer is rechargeable to a certain electrical potential.
  • the plastic layer is connected to the porous layers. Between two such interfaces is an air gap between the porous layers and the plastic layer.
  • the invention is based on the technical problem of creating a loudspeaker arrangement in a motor vehicle, which is better adapted to the structural conditions in a motor vehicle.
  • the at least one speaker is designed as an electrostatic surface speaker.
  • This has the advantage over conventional electrodynamic loudspeakers that it is extremely flat and therefore, and due to the materials used, it is easy to bend, which simplifies integration into motor vehicle moldings.
  • Another advantage is that the non-actively controlled surface loudspeaker for high frequencies of, for example, greater than IkHz automatically acts as a damper and thus dampens disturbing noises.
  • the loudspeaker arrangement is formed from at least two adjacent surface loudspeakers, which can be controlled by means of different complex transmission functions for setting a radiation characteristic.
  • the emission characteristic can be significantly improved, especially at low frequencies, since otherwise it comes at low frequencies to sidelobes, which lead to a crosstalk to adjacent vehicle seats.
  • a directional loudspeaker can be set over the entire audio frequency by means of the complex transmission functions. This is particularly advantageous if intentionally only information for a person to be radiated, for example, acoustic directions of a navigation system.
  • the complex transfer functions can be permanently set or changed adaptively in order to set a radiation characteristic which is adapted to the respective conditions with regard to the opening angle and / or direction.
  • a directional loudspeaker is understood to mean an acoustic source which radiates differently in different spatial directions, the orientation with the strongest radiation (main lobe) being designated by an angle of 0 °.
  • the quality of a directional or directional loudspeaker is generally determined by the areal extent of the radiator in comparison to the wavelength of the considered frequency.
  • a possible definition of the directional loudspeaker according to the invention is that for frequencies whose wavelength is smaller than the extension of the radiator vertical to the alignment of the radiator, all sidelobes of the directional characteristic above 45 ° are deviating from the orientation of the radiator by at least -10 dB smaller.
  • the various area loudspeakers are arranged concentrically around one another, so that a radiation characteristic symmetrical about the emission direction is adjustable, which can have a very small opening angle.
  • the surface speakers are either formed as rings or as rectangles or squares, which are arranged around each other.
  • the area loudspeakers can be arranged in strips next to each other, so that at least one lateral crosstalk is prevented. The advantage of this arrangement is the simple structure.
  • At least two adjacently arranged area loudspeakers can optionally be operated as stereo loudspeakers or as directional loudspeakers.
  • the user can select whether he would like to have a stereo sound, for example, in music playback or a good directional characteristics, so as not to disturb the other vehicle occupants.
  • the loudspeaker arrangement comprises at least one second loudspeaker, wherein a crosstalk from the first loudspeaker to the second loudspeaker can be determined and / or detected, wherein the second loudspeaker can be controlled with a signal in phase opposition to crosstalk.
  • the first loudspeaker is associated, for example, with the driver and the second loudspeaker, for example, with the front passenger, wherein the first and / or second loudspeaker can each be formed by a plurality of surface loudspeakers, so that in particular the improvement of the emission characteristic can be combined with the ANC.
  • Crosstalk can be determined in advance. If the emission characteristic or transfer function is known, the crosstalk to the second loudspeaker can be calculated from the transmitted signal of the first loudspeaker. In a preferred embodiment, however, the crosstalk is detected. At least one microphone is used for this purpose. In this case, a further advantageous property of the electrostatic loudspeaker can be further exploited, namely that they can be operated relatively easily as a microphone. If no signal voltage is actively applied to the porous layers, then a sound wave leads to a deflection of the plastic layer, which results in a voltage change at the electrodes of the porous layers, which can be tapped off as signal voltage. Therefore, it is possible to operate the speakers alternately as microphones.
  • the surface speakers are integrated in the headliner, since there is relatively much space for the flat speakers.
  • the directional microphones and / or directional loudspeakers are integrated in the headliner by means of a removable frame, wherein the two panel sides of a directional loudspeaker and / or directional microphone may possibly have different motifs. It is exploited that the electrostatic panels are symmetrical. By means of the different motifs, for example, one motif can be adapted to the headliner, whereas the other motif has a child's decor.
  • the headliner itself is formed from the panel material of the surface speakers. By appropriate structuring areas of the panel can then be defined as speakers, microphones or leads. As a result, the headliner is a multi-functional element.
  • the porous layer is then formed as an insulator, which is metallized on the plastic layer side facing. As a result, there is no voltage at the passenger compartment side facing the headliner.
  • At least one bending wave loudspeaker is integrated in the headliner, which can preferably be switched on or off as needed.
  • the user can, for example, select the bending wave loudspeakers for playing music, while exploiting the directional characteristics of the surface loudspeakers when supporting a verbal communication.
  • the surface loudspeakers are associated with a crossover, the frequency components less than 250 Hz, preferably less than 200 Hz, are output in phase to all surface speakers, more preferably, the crossover is switched on or off.
  • the crossover is switched on or off.
  • switched crossover then the sound pressure for low frequencies can be increased, which may be desirable for music playback.
  • switched off crossover however, as described above, the directional characteristics of the speakers can be adjusted, for example, by choosing different complex transfer functions.
  • FIG. 1 is a schematic representation of a plurality of strip-shaped surface-mounted speakers
  • Fig. 2 is a schematic representation of two surface speakers for a
  • ANC and Fig. 3 is a schematic representation of an integration in the headliner.
  • a loudspeaker arrangement 1 is shown schematically in a motor vehicle.
  • the loudspeaker arrangement 1 comprises a plurality of strip-side electrostatic area loudspeakers LS 1.1-LS 1.6, which are arranged adjacent to one another and are associated with a region of the motor vehicle, for example the driver's seat.
  • the surface loudspeakers LS 1.1 - LS 1.6 are each preceded by a filter function H1 (f) - H6 (f), which are supplied with the same signal s.
  • a filter function H1 (f) - H6 (f) By suitable choice of the complex filter functions H1 (f) - H6 (f), a beamforming can be achieved by means of which one can suppress side lobes in one direction. In the example shown, the right side lobe is suppressed to the passenger seat.
  • the complex filter functions H1 (f) - H6 (f) can be pivoted, the main lobe, so that thereby an alignable directional speaker is realized.
  • the arrangement comprises a first area loudspeaker 1, which is associated, for example, with the driver's seat, and a second area loudspeaker 2, which is associated, for example, with the passenger seat. It is assumed that the surface speaker 1 emits a useful signal, which leads to a crosstalk in the passenger seat. This crosstalk is symbolized by the sinusoidal solid wave.
  • a processor 3 calculates, based on a known transfer function H FB from the driver to the passenger seat and the radiated useful signal, what the crosstalk looks like and controls the second surface speaker with the anti-phase crosstalk signal (shown in phantom), so that it comes to extinction in the ideal case.
  • FIG. 3 shows schematically how the electrostatic loudspeakers L and microphones M are integrated in a headliner 4.
  • the headliner 4 itself consists of the panel material, wherein the outer surface 5 of a porous layer forms the visible part of the headliner 4.
  • the electrical leads are defined so that areas are defined that work as speakers or as a microphone. It should be noted that, if below the motor vehicle was mentioned, this includes in addition to automobiles of all types and sizes and aircraft, trains and the like.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention concerne un système de haut-parleurs dans un véhicule comportant au moins un haut-parleur pouvant être commandé par un processeur audio, le haut-parleur étant conçu en tant qu'au moins un haut-parleur plat électrostatique (LS1.1 - LS1.6; 1; 2).
EP05790085A 2004-10-04 2005-09-28 Systeme de haut-parleurs dans un vehicule Ceased EP1800513A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410048990 DE102004048990A1 (de) 2004-10-04 2004-10-04 Lautsprecheranordnung in einem Kraftfahrzeug
PCT/EP2005/010631 WO2006037586A1 (fr) 2004-10-04 2005-09-28 Systeme de haut-parleurs dans un vehicule

Publications (1)

Publication Number Publication Date
EP1800513A1 true EP1800513A1 (fr) 2007-06-27

Family

ID=35427700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05790085A Ceased EP1800513A1 (fr) 2004-10-04 2005-09-28 Systeme de haut-parleurs dans un vehicule

Country Status (5)

Country Link
US (1) US8848938B2 (fr)
EP (1) EP1800513A1 (fr)
CN (1) CN101036415B (fr)
DE (1) DE102004048990A1 (fr)
WO (1) WO2006037586A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004048990A1 (de) * 2004-10-04 2006-04-06 Volkswagen Ag Lautsprecheranordnung in einem Kraftfahrzeug
DE102005058175A1 (de) * 2005-12-05 2007-06-06 Volkswagen Ag Lautsprecheranordnung zur Beschallung in einem Kraftfahrzeug
DE102006045385B4 (de) * 2006-03-01 2020-09-24 Volkswagen Ag Lautsprecheranordnung in einem Kraftfahrzeug sowie ein Verfahren zur Ansteuerung des mindestens einen Lautsprechers
DE102006049543A1 (de) * 2006-06-13 2007-12-20 Volkswagen Ag Lautsprecheranordnung zur gerichteten Beschallung eines Kraftfahrzeugsitzes
DE102007004591A1 (de) * 2007-01-30 2008-07-31 Siemens Ag Vorrichtung zur Schallerzeugung in einem Fahrzeug
DE102007028476A1 (de) 2007-06-18 2008-12-24 Volkswagen Ag Verfahren und Vorrichtung zur Kommunikation in einem Kraftfahrzeug
US9268522B2 (en) 2012-06-27 2016-02-23 Volkswagen Ag Devices and methods for conveying audio information in vehicles
US9294839B2 (en) 2013-03-01 2016-03-22 Clearone, Inc. Augmentation of a beamforming microphone array with non-beamforming microphones
EP2806663B1 (fr) 2013-05-24 2020-04-15 Harman Becker Automotive Systems GmbH Génération de zones sonores individuelles dans une salle d'écoute
EP3051838A1 (fr) * 2015-01-30 2016-08-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Positionnement de réseau de haut-parleurs embarqué dans un véhicule
US9725047B2 (en) * 2015-06-22 2017-08-08 Ford Global Technologies, Llc Loudspeaker arrangement in a vehicle
US9723409B2 (en) 2015-07-09 2017-08-01 Honda Motor Co., Ltd. Vehicle audio system
EP3133831A1 (fr) * 2015-08-20 2017-02-22 Harman Becker Automotive Systems GmbH Système et méthode pour communication embarquée
US10250983B1 (en) 2017-09-15 2019-04-02 NIO USA Inc. Distributed and upgradable audio system

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WO1998013942A1 (fr) * 1996-09-25 1998-04-02 Nct Group, Inc. Systeme de haut-parleur pour vehicules
US20020110256A1 (en) * 2001-02-14 2002-08-15 Watson Alan R. Vehicle accessory microphone

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WO1998013942A1 (fr) * 1996-09-25 1998-04-02 Nct Group, Inc. Systeme de haut-parleur pour vehicules
US20020110256A1 (en) * 2001-02-14 2002-08-15 Watson Alan R. Vehicle accessory microphone

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Also Published As

Publication number Publication date
US8848938B2 (en) 2014-09-30
CN101036415B (zh) 2013-02-06
DE102004048990A1 (de) 2006-04-06
WO2006037586A1 (fr) 2006-04-13
US20080192953A1 (en) 2008-08-14
CN101036415A (zh) 2007-09-12

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