WO2007065941A1 - Loud speaker system - Google Patents

Loud speaker system Download PDF

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Publication number
WO2007065941A1
WO2007065941A1 PCT/EP2006/069461 EP2006069461W WO2007065941A1 WO 2007065941 A1 WO2007065941 A1 WO 2007065941A1 EP 2006069461 W EP2006069461 W EP 2006069461W WO 2007065941 A1 WO2007065941 A1 WO 2007065941A1
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WO
WIPO (PCT)
Prior art keywords
speaker
loudspeaker
loudspeakers
transmission element
speaker system
Prior art date
Application number
PCT/EP2006/069461
Other languages
German (de)
French (fr)
Inventor
Hans-Peter Grabsch
Michael Fischer
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2007065941A1 publication Critical patent/WO2007065941A1/en

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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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/02—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/024—Positioning of loudspeaker enclosures for spatial sound reproduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2217/00—Details of magnetostrictive, piezoelectric, or electrostrictive transducers covered by H04R15/00 or H04R17/00 but not provided for in any of their subgroups
    • H04R2217/03—Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves
    • 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
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

  • the invention relates to a loudspeaker system according to the preamble of claim 1.
  • acoustic signals there are relatively many acoustic signals in vehicles.
  • other acoustic signals may also be present. These can, for example, from a
  • Speakers of a telephone hands-free system, a navigation system, or a video player come.
  • Such acoustic signals are heard both by a driver and, for example, by a passenger. For example, if a video is played that is only for one
  • Loudspeaker systems transmit the acoustic signals for all occupants. It would therefore be desirable to reduce or avoid all disturbing and / or distracting influences, in particular for the driver.
  • a telephone conversation made during a trip can also contain information that is intended only for the passenger or passengers and, for example, should or should not be heard by the driver.
  • the invention has for its object to improve a speaker system so that a directional signal transmission is possible, while at the same time less space should be required.
  • acoustic information, reproduction of light music or the like can be aimed at one person. This increases traffic safety because a driver is no longer distracted by acoustic signals that are not necessarily intended for him.
  • the directional film loudspeakers send acoustic signals at a suitable distance from the head or ears of the occupants to be irradiated.
  • the two directional film loudspeakers in particular, with a very sharp bundling send the acoustic signals to the ear of an occupant, so that a dichotic, binaural transmission takes place.
  • Confidential or personal information can also be created using the inventive method
  • the loudspeakers are arranged on a dashboard, a vehicle roof or on a seat. Due to the flat design of the foil speakers, placement in one of the preferred locations is possible. Special cutouts or the like are not required due to the film connection.
  • the transmission element has a carrier frequency between 100 kHz and 200 kHz, in particular 180 kHz. This relatively high carrier frequency enables very short distances to the loudspeaker, which favors a flat design. Such a design is particularly important for flat screens. Different directions can advantageously be operated with a plurality of carrier frequencies.
  • the loudspeakers are expediently designed for stereophonic transmission.
  • the speaker system enables stereophony with high channel separation.
  • a transmission element This is in particular designed as an amplitude-modulated transmission element, which is easy to implement in terms of circuitry.
  • a high carrier frequency of at least 18OkHz allows very short distances from the transmission element i.e. from the film to the ear, which favors a very flat design.
  • a transparent design of the flat loudspeaker is possible and / or high carrier frequencies are possible if, according to a further advantageous embodiment of the invention, the film loudspeakers of the system are designed as so-called electret films. Appropriate process technology enables such high carrier frequencies to be achieved. Such films can be produced transparently and possibly printed.
  • Display device and / or an on-board computer and / or a music playback device, in particular a car radio.
  • a targeted device a targeted
  • Audio playback may be very desirable.
  • a desired volume for example of a car radio, can be individually adjusted from occupant to occupant, this being done in particular according to a further preferred embodiment of the system according to the invention with several pairs of loudspeakers, each one
  • Occupants are assigned.
  • a particular advantage can be seen in the fact that the warnings that may be required in driver aisle systems can be sent to the driver in a targeted and safe manner (ie without interference, even with intensive other sound systems).
  • the figure shows a loudspeaker system according to the invention in a passenger compartment of a car.
  • the loudspeaker system has two film loudspeakers 10, 10 ', 10 ", 10'” and 11, IT, 11 ", 11 '". They are installed on the baffle plate of the steering wheel 12 in front of the driver seat 13.
  • the film loudspeakers 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'” are therefore positioned within the passenger compartment in such a way that there is an acoustic signal bundling directed towards a person 14, the loudspeakers near the head the person 14 are arranged.
  • the foil loudspeakers 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'” are arranged in the vicinity of the head 15 and in the vicinity of the ears 16 of the person 14 and focused on this. It is also possible for the loudspeakers 10 ′, 11 ′, 10 ′′, 11 ′′ to be arranged on a dashboard 17, a headliner or at another location on the seat 13.
  • the arrangement as a transparent film on an instrument cluster, or what is particularly advantageous, as a loudspeaker 10 ′′, 11 ′′ on the front pane 18 is possible.
  • the invention also eliminates the space for additional speakers.
  • This arrangement of the loudspeakers 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'” also ensures good stereophonic transmission.
  • a loudspeaker with different carrier frequencies is also possible for dichotic transmission.
  • the loudspeaker system can be connected to a telephone, a video device, a navigation system, a display device, an on-board computer or a music playback device, in particular a car radio, or another device that sends acoustic signals.
  • Each speaker 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'” is actuated or activated by a transmission element, not shown, by means of a carrier frequency.
  • the transmission element is preferably an amplitude-modulated transmission element with a carrier frequency of preferably at least 180 kHz.
  • the transmission element thus uses a carrier frequency on which the actual audio signal is modulated and used for the directional audio transmission.
  • Electronics are integrated in the transmission element.
  • Each foil speaker 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'” is also an electret
  • Formed film that enables such frequencies and can also be transparent or printed.
  • a film enables short transmission distances to the loudspeaker.
  • the electret film i.e. a film that has been permanently polarized electrically is used using the converter principle.
  • a sound beam can be aligned by interconnecting many small areas of the film surface to form a phased array.
  • the later audible sound is modulated onto the high (carrier) frequency (amplitude).
  • the high-frequency amplitude-modulated sound is converted into audible sound after a certain distance due to a non-linearity effect of the air, similar to a simple demudolator in a medium wave radio.
  • Each headrest can be equipped with such a pair of speakers, so that each occupant has his or her pair of speakers. This allows each occupant to determine how loud they want to listen to light music, regardless of other occupants.

Abstract

The invention relates to a loudspeaker system for a vehicle, comprising at least two film loudspeakers (10, 11, 10', 11', 10', 11', 10''', 11'''), which are positioned inside a passenger compartment of a vehicle such that an acoustic signal bundle is oriented towards a person (14). The loudspeakers (10, 11, 10', 11', 10', 11', 10''', 11''') are arranged in the vicinity of the head of a person (14) preventing other passengers from being disturbed from audio signals.

Description

Beschreibung  description
Titel title
Lautsprechersystem  Speaker system
Technisches Gebiet Technical field
Die Erfindung betrifft ein Lautsprechersystem nach dem Oberbegriff des Anspruches 1. The invention relates to a loudspeaker system according to the preamble of claim 1.
Stand der Technik State of the art
In Fahrzeugen sind relativ viele akustische Signale vorhanden. Neben einer Musikwiedergabe oder einer Verkehrsinformation aus einem Autoradio können noch weitere akustische Signale vorhanden sein. Diese können beispielsweise aus einemThere are relatively many acoustic signals in vehicles. In addition to music playback or traffic information from a car radio, other acoustic signals may also be present. These can, for example, from a
Lautsprecher einer Telefonfreisprecheinrichtung, einem Navigationssystem, oder einem Videoabspielgerät kommen. Speakers of a telephone hands-free system, a navigation system, or a video player come.
Derartige akustische Signale werden sowohl von einem Fahrer als auch beispielsweise von einem Beifahrer gehört. Wird beispielsweise ein Video abgespielt, das nur für einenSuch acoustic signals are heard both by a driver and, for example, by a passenger. For example, if a video is played that is only for one
Beifahrer bestimmt ist, dann kann der Videoton den Fahrer ablenken. HerkömmlichePassenger is determined, then the video sound can distract the driver. Conventional
Lautsprechersysteme übertragen die akustischen Signale nämlich für alle Insassen. Es wäre daher wünschenswert, sämtliche Stör- und/oder Ablenkeinflüsse insbesondere für den Fahrer zu verringern oder zu vermeiden. Auch kann ein während einer Fahrt geführtes Telefongespräch Informationen beinhalten, die nur für den oder die Beifahrer bestimmt sind und zum Beispiel vom Fahrer nicht gehört werden sollen oder müssen. Darstellung der Erfindung, Aufgabe, Lösung, Vorteile Loudspeaker systems transmit the acoustic signals for all occupants. It would therefore be desirable to reduce or avoid all disturbing and / or distracting influences, in particular for the driver. A telephone conversation made during a trip can also contain information that is intended only for the passenger or passengers and, for example, should or should not be heard by the driver. Presentation of the invention, task, solution, advantages
Der Erfindung liegt die Aufgabe zugrunde, ein Lautsprechersystem so zu verbessern, dass eine gerichtete Signalübertragung möglich ist, wobei auch gleichzeitig weniger Bauraum benötigt werden soll. The invention has for its object to improve a speaker system so that a directional signal transmission is possible, while at the same time less space should be required.
Diese Aufgabe wird durch ein Lautsprechersystem mit den Merkmalen des Anspruches 1 gelöst. This object is achieved by a loudspeaker system with the features of claim 1.
Durch das erfindungsgemäße Lautsprechersystem kann eine akustische Information, eine Wiedergabe von Unterhaltungsmusik oder dergleichen zielgerichtet auf eine Person erfolgen. Dadurch wird die Verkehrssicherheit erhöht, denn ein Fahrer wird nicht mehr durch akustische Signale abgelenkt, die nicht unbedingt für ihn bestimmt sind. With the loudspeaker system according to the invention, acoustic information, reproduction of light music or the like can be aimed at one person. This increases traffic safety because a driver is no longer distracted by acoustic signals that are not necessarily intended for him.
Die direktionalen Folienlautsprecher senden akustische Signale in geeigneter Distanz zum Kopf bzw. zu den Ohren der zu beschallenden Insassen. Die insbesondere zwei direktionalen Folienlautsprecher mit einer sehr scharfen Bündelung senden die akustischen Signale jeweils zum Ohr eines Insassens, so dass eine dichotische, binaurale Übertragung erfolgt. The directional film loudspeakers send acoustic signals at a suitable distance from the head or ears of the occupants to be irradiated. The two directional film loudspeakers, in particular, with a very sharp bundling send the acoustic signals to the ear of an occupant, so that a dichotic, binaural transmission takes place.
Störungen anderer Insassen durch Audiosignale werden also vermieden. Auch vertrauliche oder personengebundene Informationen können durch das erfindungsgemäßeInterference from other occupants by audio signals is thus avoided. Confidential or personal information can also be created using the inventive method
System auch während einer Fahrt übertragen werden. System can also be transmitted while driving.
In einer ersten vorteilhaften Variante des erfindungsgemäßen Lautsprechersystems ist vorgesehen, dass die Lautsprecher auf einem Armaturenbrett, einem Fahrzeughimmel oder an einem Sitz angeordnet sind. Durch die flache Bauweise der Folienlautsprecher ist eine Plazierung an einem der bevorzugten Orten möglich. Besondere Aussparungen oder dergleichen sind durch die Folienanbindung nicht erforderlich. In einer bevorzugten Ausführungsform weist das Übertragungselement eine Trägerfrequenz zwischen 100 kHz und 200 kHz, insbesondere 180 kHz auf. Durch diese relativ hohe Trägerfrequenz sind sehr kurze Abstände zum Lautsprecher möglich, was eine flache Bauweise begünstigt. Insbesondere für Flachbildschirme ist eine solche Bauweise wichtig. Mit mehreren Trägerfrequenzen lassen sich vorteilhafterweise unterschiedliche Richtungen bedienen. In a first advantageous variant of the loudspeaker system according to the invention it is provided that the loudspeakers are arranged on a dashboard, a vehicle roof or on a seat. Due to the flat design of the foil speakers, placement in one of the preferred locations is possible. Special cutouts or the like are not required due to the film connection. In a preferred embodiment, the transmission element has a carrier frequency between 100 kHz and 200 kHz, in particular 180 kHz. This relatively high carrier frequency enables very short distances to the loudspeaker, which favors a flat design. Such a design is particularly important for flat screens. Different directions can advantageously be operated with a plurality of carrier frequencies.
Zweckmäßigerweise sind die Lautsprecher für eine Stereophonieübertragung ausgebildet. Das Lautsprechersystem ermöglicht nämlich eine Stereophonie mit hoher Kanaltrennung. The loudspeakers are expediently designed for stereophonic transmission. The speaker system enables stereophony with high channel separation.
Von Vorteil ist es, die akustischen Signale an die jeweilige Folie durch ein Übertragungselement erfolgen. Dieses ist insbesondere als ein amplitudenmoduliertes Übertragungselement ausgebildet, was schaltungstechnisch einfach umzusetzen ist. Eine hohe Trägerfrequenz von mindestens 18OkHz erlaubt sehr kurze Abstände vom Übertragungselement d.h. von der Folie zum Ohr, was eine sehr flache Bauweise begünstigt. It is advantageous for the acoustic signals to be sent to the respective film by means of a transmission element. This is in particular designed as an amplitude-modulated transmission element, which is easy to implement in terms of circuitry. A high carrier frequency of at least 18OkHz allows very short distances from the transmission element i.e. from the film to the ear, which favors a very flat design.
Eine transparente Ausführung des flachen Lautsprechers ist möglich und/oder hohe Trägerfrequenzen sind möglich, wenn nach einer weiteren vorteilhaften Ausführung der Erfindung die Folienlautsprecher des Systems als sogenannte Electret-Folie ausgebildet sind. Durch eine entsprechende Prozesstechnik können solch hohe Trägerfrequenzen realisiert werden. Solche Folien lassen sich transparent herstellen und evtl. bedrucken. A transparent design of the flat loudspeaker is possible and / or high carrier frequencies are possible if, according to a further advantageous embodiment of the invention, the film loudspeakers of the system are designed as so-called electret films. Appropriate process technology enables such high carrier frequencies to be achieved. Such films can be produced transparently and possibly printed.
Besonders günstig ist eine Verbindung des erfindungsgemäßen Lautsprechersystems mit einem Telefon und/oder einem Videogerät, und/oder einem Navigationssystem und/oderA connection of the loudspeaker system according to the invention to a telephone and / or a video device, and / or a navigation system and / or is particularly favorable
Anzeigegerät und/oder einem Bordcomputer und/oder einem Musikwiedergabegerät, insbesondere einem Autoradio. Bei solchen Geräten kann eine zielgerichteteDisplay device and / or an on-board computer and / or a music playback device, in particular a car radio. With such devices, a targeted
Audiowiedergabe sehr gewünscht sein. So kann eine gewünschte Lautstärke beispielsweise eines Autoradios von Insasse zu Insasse individuell eingestellt werden, wobei dies insbesondere nach einer weiteren bevorzugten Ausbildung des erfindungsgemäßen Systems mit mehreren Lautsprecherpaaren erfolgt, die jeweils einemAudio playback may be very desirable. A desired volume, for example of a car radio, can be individually adjusted from occupant to occupant, this being done in particular according to a further preferred embodiment of the system according to the invention with several pairs of loudspeakers, each one
Insassen zugeordnet sind. Ein besonderer Vorteil ist darin zu sehen, dass die eventuell notwendigen Warnungen bei Fahrerassisystensystemen zielgerichtet und sicher (d.h. störungsfrei auch bei intensiver sonstiger Beschallung) dem Fahrer zugeleitet werden können. Occupants are assigned. A particular advantage can be seen in the fact that the warnings that may be required in driver aisle systems can be sent to the driver in a targeted and safe manner (ie without interference, even with intensive other sound systems).
Kurze Beschreibung der Zeichnung Brief description of the drawing
Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnung näher erläutert. Die Figur zeigt in rein schematischer Darstellung ein nach der Erfindung ausgeführtesAn embodiment of the invention is explained in more detail with reference to the drawing. The figure shows a purely schematic representation of one designed according to the invention
Lautsprechersystem für ein Pkw. Speaker system for a car.
Bester Weg zur Ausführung der Erfindung Best way to carry out the invention
Die Figur zeigt ein erfindungsgemäßes Lautsprechersystem in einer Fahrgastzelle eines Pkw. Das Lautsprechersystem weist zwei Folienlautsprecher 10, 10', 10", 10'" und 11, I T, 11", 11'" auf. Sie sind an der Prallplatte des Lenkrades 12 vor dem Fahrersitz 13 installiert. The figure shows a loudspeaker system according to the invention in a passenger compartment of a car. The loudspeaker system has two film loudspeakers 10, 10 ', 10 ", 10'" and 11, IT, 11 ", 11 '". They are installed on the baffle plate of the steering wheel 12 in front of the driver seat 13.
Die Folienlautsprecher 10, 11, 10', 11 ', 10", 11", 10'", 11 '" sind daher innerhalb des Fahrgastraumes so positioniert, dass eine auf eine Person 14 gerichtete akustische Signalbündelung gegeben ist, wobei die Lautsprecher in Kopfnähe der Person 14 angeordnet sind. The film loudspeakers 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'" are therefore positioned within the passenger compartment in such a way that there is an acoustic signal bundling directed towards a person 14, the loudspeakers near the head the person 14 are arranged.
Wie die Figur veranschaulicht, sind die Folienlautsprecher 10, 11, 10', 11 ', 10", 11", 10'", 11 '" in der Nähe des Kopfes 15 bzw. in der Nähe der Ohren 16 der Person 14 angeordnet und auf diese gerichtet. Möglich ist auch, dass die Lautsprecher 10', 11 ', 10", 11" auf einem Armaturenbrett 17, einem Fahrzeughimmel oder an einer anderen Stelle des Sitzes 13 angeordnet sind. Dabei ist die Anordnung als durchsichtige Folie auf einem Kombiinstrument, oder was besonders vorteilhaft ist, als Lautsprecher 10", 11" auf der Frontscheibe 18 möglich. Durch die Erfindung entfällt außerdem ein Bauraum für zusätzliche Lautsprecher. As the figure illustrates, the foil loudspeakers 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'" are arranged in the vicinity of the head 15 and in the vicinity of the ears 16 of the person 14 and focused on this. It is also possible for the loudspeakers 10 ′, 11 ′, 10 ″, 11 ″ to be arranged on a dashboard 17, a headliner or at another location on the seat 13. The arrangement as a transparent film on an instrument cluster, or what is particularly advantageous, as a loudspeaker 10 ″, 11 ″ on the front pane 18 is possible. The invention also eliminates the space for additional speakers.
Durch diese Anordnung der Lautsprecher 10, 11, 10', 11 ', 10", 11", 10'", 11'" ist zudem eine gute Stereophonieübertragung gegeben. Hierzu ist auch für dichotische Übertragung ein Lautsprecher mit unterschiedlichen Trägerfrequenzen möglich. This arrangement of the loudspeakers 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'" also ensures good stereophonic transmission. A loudspeaker with different carrier frequencies is also possible for dichotic transmission.
Das Lautsprechersystem kann mit einem Telefon, einem Videogerät, einem Navigationssystem, einem Anzeigegerät, einem Bordcomputer oder einem Musikwiedergabegerät, insbesondere einem Autoradio, oder einem anderen akustische Signale sendenden Gerät verbunden sein. The loudspeaker system can be connected to a telephone, a video device, a navigation system, a display device, an on-board computer or a music playback device, in particular a car radio, or another device that sends acoustic signals.
Jeder Lautsprecher 10, 11, 10', 11', 10", 11", 10'", 11 '" wird durch ein nicht dargestelltes Übertragungselement mittels einer Trägerfrequenz betätigt bzw. aktiviert. Das Übertragungselement ist bevorzugterweise ein amplitudenmoduliertes Übertragungselement mit einer Trägerfrequenz von vorzugsweise mindestens 180 kHz.Each speaker 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'" is actuated or activated by a transmission element, not shown, by means of a carrier frequency. The transmission element is preferably an amplitude-modulated transmission element with a carrier frequency of preferably at least 180 kHz.
Das Übertragungselement benutzt also eine Trägerfrequenz auf der das eigentliche Audiosignal moduliert und für die gerichtete Audioübertragung verwendet wird. Eine Elektronik ist im Übertragungselement integriert. Jeder Folienlautsprecher 10, 11, 10', 11 ', 10", 11", 10'", 11 '" ist außerdem als Electret-The transmission element thus uses a carrier frequency on which the actual audio signal is modulated and used for the directional audio transmission. Electronics are integrated in the transmission element. Each foil speaker 10, 11, 10 ', 11', 10 ", 11", 10 '", 11'" is also an electret
Folie ausgebildet, die solche Frequenzen ermöglicht und außerdem transparent oder bedruckt ausgebildet sein kann. Außerdem sind durch eine derartige Folie kurze Übertragungsabstände zum Lautsprecher möglich. Die Electret-Folie, d.h. eine Folie, die permanent elektrisch polarisiert wurde, wird dabei unter Nutzung des Wandler-Prinzps verwendet. Formed film that enables such frequencies and can also be transparent or printed. In addition, such a film enables short transmission distances to the loudspeaker. The electret film, i.e. a film that has been permanently polarized electrically is used using the converter principle.
Durch Anlegen von Wechselspannung an die Electret-Folie wird die Folienoberfläche in Normalen-Richtung bewegt. Diese Bewegungen führen zu einer Schallabstrahlung. Dies funktioniert für hohe Frequenzen besser, da hier nur kleine Auslenkungen derBy applying AC voltage to the electret film, the film surface is moved in the normal direction. These movements lead to sound radiation. This works better for high frequencies because there are only small deflections of the
Folienoberfläche benötigt werden. Durch Zusammenschaltung vieler kleiner Bereiche der Folienoberfläche zu einem Phased Array, lässt sich ein Schallstrahl ausrichten. Der später hörbare Schall wird auf die hohe (Träger-) Frequenz aufmoduliert (Amplitude). Die Umsetzung des hochfrequenten amplitudenmodulierten Schalls in hörbaren Schall erfolgt nach einer gewissen Wegstrecke durch einen Nichtlinearitätseffekt der Luft, ähnlich einem einfachen Demudolator in einem Mittelwellenradio. Foil surface are needed. A sound beam can be aligned by interconnecting many small areas of the film surface to form a phased array. The later audible sound is modulated onto the high (carrier) frequency (amplitude). The high-frequency amplitude-modulated sound is converted into audible sound after a certain distance due to a non-linearity effect of the air, similar to a simple demudolator in a medium wave radio.
Jede Kopfstütze kann mit einem solchen Lautsprecherpaar ausgestattet sein, so dass jeder Insasse sein Lautsprecherpaar hat. Dadurch kann jeder Insasse unabhängig von anderen Insassen bestimmen, wie laut er beispielsweise Unterhaltungsmusik hören will. Each headrest can be equipped with such a pair of speakers, so that each occupant has his or her pair of speakers. This allows each occupant to determine how loud they want to listen to light music, regardless of other occupants.
Eine Anordnung in einem anderen Fahrzeug, wie Lkw, oder einem anderen Verkehrsmittel, wie Flugzeug oder Reisezug, ist auch denkbar. An arrangement in another vehicle, such as a truck, or another means of transport, such as an airplane or a train, is also conceivable.

Claims

Ansprüche Expectations
1. Lautsprechersystem für ein Fahrzeug, mit mindestens zwei Folienlautsprechern (10, 11, 10', 11', 10", 11", 10'", 11 '"), und/oder mit einem Folienlautsprecher, der durch geeignete Ansteuerung mindestens zwei gerichtete Schallstrahlen sendet, die bzw. der innerhalb eines Fahrgastraumes so positioniert sind bzw. ist, dass eine auf eine Person1. Loudspeaker system for a vehicle, with at least two foil speakers (10, 11, 10 ', 11', 10 ", 11", 10 '", 11'"), and / or with a foil speaker, which can be controlled by at least two sends directional sound beams that are positioned within a passenger compartment in such a way that one onto a person
(14) gerichtete akustische Signalbündelung gegeben ist, wobei der oder die Lautsprecher (10, 11, 10', 11 ', 10", 11", 10'", 11 '") in Kopfnähe der Person (14) angeordnet sind. (14) directional acoustic signal bundling is given, the loudspeaker or loudspeakers (10, 11, 10 ', 11', 10 ", 11", 10 '", 11'") being arranged close to the head of the person (14).
2. Lautsprechersystem nach Anspruch 1, dadurch gekennzeichnet, dass die Lautsprecher (10, 11, 10', 11 ', 10", 11", 10'", 11 '") auf einem Armaturenbrett (17), einem Fahrzeughimmel oder an einem Sitz (13), auf einem Lenkrad (12) oder auf einer Scheibe, insbesondere auf der Frontscheibe (18), angeordnet sind. 2. Loudspeaker system according to claim 1, characterized in that the loudspeakers (10, 11, 10 ', 11', 10 ", 11", 10 '", 11'") on a dashboard (17), a headliner or on one Seat (13), on a steering wheel (12) or on a disc, in particular on the windscreen (18), are arranged.
3. Lautsprechersystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Lautsprecher (10, 11, 10', 11 ', 10", 11", 10'", 11 '") für eine Stereophonieübertragung ausgebildet sind. 3. Loudspeaker system according to claim 1 or 2, characterized in that the loudspeakers (10, 11, 10 ', 11', 10 ", 11", 10 '", 11'") are designed for stereophonic transmission.
4. Lautsprechersystem nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine Verbindung mit einem Telefon und/oder einem Videogerät, und/oder einem Navigationssystem und/oder Anzeigegerät und/oder einem Bordcomputer und/oder einem4. Speaker system according to one of the preceding claims, characterized by a connection to a telephone and / or a video device, and / or a navigation system and / or display device and / or an on-board computer and / or one
Musikwiedergabegerät, insbesondere einem Autoradio, und/oder einem Fahrzeugassistenzsystem wie z.B. Blindspotdetection und/oder einem Fahrerinformationssystem wie z.B. eine Einparkhilfe. 5. Lautsprechersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder Lautsprecher (10, 11, 10', 11 ', 10", 11", 10'", 11 '") durch ein Übertragungselement mit mindestens einer Trägerfrequenz betätigbar ausgeführt ist. Music playback device, in particular a car radio, and / or a vehicle assistance system such as blind spot detection and / or a driver information system such as a parking aid. 5. Speaker system according to one of the preceding claims, characterized in that each speaker (10, 11, 10 ', 11', 10 ", 11", 10 '", 11'") is designed to be actuated by a transmission element with at least one carrier frequency .
6. Lautsprechersystem nach Anspruch 5, dadurch gekennzeichnet, dass das Übertragungselement ein amplitudenmoduliertes Übertragungselement ist. 6. Speaker system according to claim 5, characterized in that the transmission element is an amplitude-modulated transmission element.
7. Lautsprechersystem nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass das Übertragungselement mindestens eine Trägerfrequenz zwischen 100 kHz und 200 kHz, insbesondere von 180 kHz aufweist. 7. Speaker system according to claim 5 or 6, characterized in that the transmission element has at least one carrier frequency between 100 kHz and 200 kHz, in particular of 180 kHz.
8. Lautsprechersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder Folienlautsprecher (10, 11, 10', 11 ', 10", 11", 10'", 11 '") als Electret-Folie ausgebildet ist. 8. Speaker system according to one of the preceding claims, characterized in that each film speaker (10, 11, 10 ', 11', 10 ", 11", 10 '", 11'") is designed as an electret film.
9. Lautsprechersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mehrere Lautsprecherpaaren vorhanden sind. 10. Verwendung eines Lautsprechersystems nach einem der vorhergehenden Ansprüche in einem Fahrzeug. 9. Speaker system according to one of the preceding claims, characterized in that a plurality of pairs of speakers are present. 10. Use of a loudspeaker system according to one of the preceding claims in a vehicle.
PCT/EP2006/069461 2005-12-09 2006-12-08 Loud speaker system WO2007065941A1 (en)

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