EP2817175A1 - Loudspeaker system for a motor vehicle - Google Patents

Loudspeaker system for a motor vehicle

Info

Publication number
EP2817175A1
EP2817175A1 EP13706433.3A EP13706433A EP2817175A1 EP 2817175 A1 EP2817175 A1 EP 2817175A1 EP 13706433 A EP13706433 A EP 13706433A EP 2817175 A1 EP2817175 A1 EP 2817175A1
Authority
EP
European Patent Office
Prior art keywords
sound
damping device
speaker
loudspeaker
pipe
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
EP13706433.3A
Other languages
German (de)
French (fr)
Other versions
EP2817175B1 (en
Inventor
Adam Sulowski
Christian RÜCKERT
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP2817175A1 publication Critical patent/EP2817175A1/en
Application granted granted Critical
Publication of EP2817175B1 publication Critical patent/EP2817175B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes
    • 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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2803—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means for loudspeaker transducers
    • 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
    • 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 speaker system for a motor vehicle with at least one speaker according to the closer defined in the preamble of claim 1.
  • Such speaker systems are known from the general state of the art. Due to the limited installation space conditions while the speaker is placed outside the interior or passenger compartment of the vehicle and the generated sound waves are introduced via a pipe into the passenger compartment. The problem with this is, however, that in the states in which the speaker system is not operated, unwanted noise, for example, from the engine compartment, can penetrate into the passenger compartment of the motor vehicle, since the speaker membrane is not able to provide sufficient sound insulation.
  • the inventive sound damping device which is connected to the pipeline, the sound transmission of the pipeline can be reduced, thereby preventing that additional, unwanted noise can pass through the pipe into the passenger compartment.
  • the loudspeaker system according to the invention thus represents a very easy to implement solution for preventing noise problems for cases in which it is necessary, for example, for space reasons to arrange a speaker outside the passenger compartment of the motor vehicle and connect by means of a pipe to the passenger compartment.
  • a particularly good sound attenuation is achieved when the at least one Sound damping device is arranged directly in at least one of the pipes.
  • Such an arrangement of the sound damping device within a pipeline is also structurally particularly easy to implement.
  • the at least one sound damping device is connected via at least one connecting line with at least one of the pipes. This makes it possible to arrange the sound damping device at a location independent of the pipeline within the motor vehicle, which can represent a considerable advantage, especially in tight space conditions.
  • the at least one connecting line with at least one shut-off device can be closed. In this way, the effect of the sound damping device can be switched off by the shut-off device disconnects the same.
  • FIG. 1 shows a first embodiment of the loudspeaker system according to the invention
  • FIG. 2 shows a second embodiment of the loudspeaker system according to the invention
  • FIG. 3 shows a first embodiment of the plate damping device for the loudspeaker system according to the invention
  • 4 shows a second embodiment of the plate damping device for the loudspeaker system according to the invention
  • 5 shows a third embodiment of the sound damping device for the loudspeaker system according to the invention.
  • FIG. 6 shows a fourth embodiment of the sound damping device for the loudspeaker system according to the invention.
  • Fig. 1 shows a speaker system 1 for a motor vehicle, not shown in its entirety. From the motor vehicle, an engine compartment 2, ie the space in which the internal combustion engine, not shown, of the motor vehicle is arranged, a passenger compartment 3 and an end wall 4 separating the passenger compartment 3 from the engine compartment 2 are shown.
  • a loudspeaker 5 is shown in the present case, which is arranged outside of the passenger compartment 3 in a so-called water box 6 of the motor vehicle, which is separated from the engine compartment 2 by a wall 7.
  • the loudspeaker 5 is connected to the passenger compartment 3 by means of a pipeline 8, of which part 8a runs through the end wall 4.
  • a portion 8b of the pipe 8 also extends from the speaker 5, starting in the opposite direction and extends through the wall 7 in the engine compartment 2, whereby the volume available to the speaker 5 is increased because the speaker 5 via this part 8b of Pipe 8 and the volume of the engine compartment 2 is available. It is therefore an open speaker system.
  • loudspeakers 5 designed as subwoofers outside the passenger compartment 3 and to connect them via the pipeline 8 to the passenger compartment 3 and the engine compartment 2.
  • the term "pipe” stands for all structures that are able to connect the speaker 5 acoustically with a room in which the speaker 5 itself is not arranged.
  • the speaker system 1 may have more than the one speaker 5, which may be arranged at any location, not shown, in the motor vehicle. These other speakers do not necessarily have one have open construction.
  • the loudspeaker 5 can also be arranged at a completely different location of the motor vehicle, for example in the region of a boot. In principle, arrangements or arrangements in the wheel arch, in the bumper, in the boot or at other suitable locations are also possible for the loudspeaker system 1 described herein with its components as an alternative or in addition to the illustrated arrangement.
  • the transmission becomes of the sound generated by the speaker 5 in the passenger compartment 3 through the part 8a of the pipe 8, which leads from the speaker 5 to the passenger compartment 3, not disturbed.
  • FIG. 2 shows an alternative embodiment of the loudspeaker system 1.
  • the pipeline 8 is provided which, as in the embodiment of FIG. 1, acoustically connects the loudspeaker 5 arranged outside the passenger compartment 3 with the passenger compartment 3.
  • the sound damping device 9 is not arranged directly in the pipe 8, but connected via a connecting line 10 with the pipe 8.
  • the connecting line 10 in this exemplary embodiment can be closed with a shut-off device 11, which in the present case is designed as a flap rotatable about a rotation axis 12.
  • the shut-off device 11 could instead of being designed as pivotable about the axis of rotation 12 flap in other suitable manner.
  • the shut-off device 11 closes the connecting line 10 and thus disconnects the sound damping device 9 from the loudspeaker 5.
  • the pipe 8 is opened, so that the sound generated by the speaker 5 can pass through the pipe 8 into the passenger compartment 3.
  • the shut-off device 11 is brought into its position shown by the dashed line, the pipe 8 is closed and the connecting line 10 is opened, whereby the sound damping device 9 is connected to the speaker 5, so that is prevented with the same from the engine compartment. 2 or the water box 6 sound can enter the passenger compartment 3.
  • the shut-off device 11 can be controlled via a control device, not shown, so that it can be brought into the respective desired position in which it closes or releases either the pipe 8 or the connecting line 10 to the sound damping device 9.
  • a control device may, for example, be connected to or integrated with an amplifier or the like connected to the speaker system 1 to switch the shut-off device 11 depending on whether sound is generated with the speaker system 1 or not.
  • the shut-off device 11 can be adjusted for example by means of an electric motor, of course, there are other options for switching the same. In the case in which sound is generated with the speaker system 1, the shut-off device 11 is brought into the open position to direct the sound via the pipe 8 into the passenger compartment 3. In this case, any noise from the engine compartment
  • the shut-off device 11 can be brought into its position closing the pipe 8, in order to guide possible noise in the sound damping device 9. That in this case the pipe 8 is closed, is unproblematic in terms of sound transmission, since the speaker 5 generates no sound yes. By the shut-off device 11 is thus ensured that the sound generated by the speaker 5 is not damped in an undesirable manner by the sound damping device 9.
  • the sound damping device 9 has a housing 13 in which a sound absorbing material 14, such as glass wool, rock wool or other porous or open-pored material, is located.
  • the sound absorption material 14 ensures a suitable damping of the sound entering from the pipe 8 or the connecting line 10 in the sound damping device 9 sound.
  • the sound absorbing material 14 is located inside the housing 3 and outside of the openings provided in this case, d. H. sound-permeable pipeline 8.
  • FIG. 4 An alternative embodiment of the sound damping device 9 is shown in Fig. 4.
  • a plurality of walls 15 are provided within the housing 13 of the sound damping device 9, wherein basically only one of the walls 15 could be provided.
  • Through the walls 15 runtime differences of the entering into the sound attenuation device 9 sound generated and deleted certain frequencies or greatly reduced.
  • the sound damping device 9 shown in Fig. 5 the same is designed as a Helmholtz resonator, which is not arranged directly in the pipe 8, but is connected via the connecting line 10 with the pipe 8.
  • the sound absorption material 14 is arranged within the case 13 provided here of the sound damping device 9, in turn.
  • the embodiment of the sound damping device 9 shown in FIG. 6 is a Combination of the two embodiments of Figures 3 and 5.
  • the sound damping device 9 in turn, the housing 13 with the sound absorbing material 14 disposed therein.
  • a further housing 13 is provided with disposed therein sound absorbing material 14, which acts as a Helmholtz resonator.
  • shut-off device 11 could be arranged in the connecting line 0 leading to the sound damping device designed as a Helmholtz resonator.
  • Both with the sound absorption material 14 and with the walls 15 can be achieved in particular frequency selective a desired reduction of the transmission through the pipe 8.
  • a frequency-selective design of the sound attenuation device 9 can be designed in the range between 300 Hz and 1.5 kHz, since engine noise in this frequency range has a peak.
  • the sound damping device 9 can be designed such that the frequency range in which the loudspeaker 5 operates is omitted, so that its sound generation and transmission is not disturbed.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (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

A loudspeaker system (1) for a motor vehicle has at least one loudspeaker (5) which is arranged outside the passenger space (3) of the motor vehicle and is acoustically connected to the passenger space (3) by means of at least one pipeline (8). At least one sound damping device (9) is connected to the at least one pipeline (8) which leads from the at least one loudspeaker (5) to the passenger space (3), and/or to another pipeline (8) which is connected to the at least one loudspeaker (5).

Description

Lautsprechersystem für ein Kraftfahrzeug  Speaker system for a motor vehicle
Die Erfindung betrifft ein Lautsprechersystem für ein Kraftfahrzeug mit wenigstens einem Lautsprecher nach der im Oberbegriff von Anspruch 1 näher definierten Art. The invention relates to a speaker system for a motor vehicle with at least one speaker according to the closer defined in the preamble of claim 1.
Derartige Lautsprechersysteme sind aus dem allgemeinen Stand der Technik bekannt. Aufgrund der begrenzten Bauraumverhältnisse wird dabei der Lautsprecher außerhalb des Innen- bzw. Passagierraums des Kraftfahrzeugs platziert und die erzeugten Schallwellen werden über eine Rohrleitung in den Passagierraum eingeleitet. Problematisch dabei ist jedoch, dass in den Zuständen, in denen das Lautsprechersystem nicht betrieben wird, unerwünschte Geräusche, beispielsweise aus dem Motorraum, in den Passagierraum des Kraftfahrzeugs eindringen können, da die Lautsprechermembran nicht in der Lage ist, für eine ausreichende Schalldämmung zu sorgen. Such speaker systems are known from the general state of the art. Due to the limited installation space conditions while the speaker is placed outside the interior or passenger compartment of the vehicle and the generated sound waves are introduced via a pipe into the passenger compartment. The problem with this is, however, that in the states in which the speaker system is not operated, unwanted noise, for example, from the engine compartment, can penetrate into the passenger compartment of the motor vehicle, since the speaker membrane is not able to provide sufficient sound insulation.
Es ist daher Aufgabe der vorliegenden Erfindung, ein Lautsprechersystem für ein Kraftfahrzeug zu schaffen, welches eine bessere Ausnutzung des vorhandenen Bauraums ermöglicht und dabei akustische Probleme vermeidet. It is therefore an object of the present invention to provide a loudspeaker system for a motor vehicle, which allows a better utilization of the existing space and thereby avoids acoustic problems.
Erfindungsgemäß wird diese Aufgabe durch die in Anspruch 1 genannten Merkmale gelöst. According to the invention, this object is achieved by the features mentioned in claim 1.
Durch die erfindungsgemäße Schalldämpfungseinrichtung, die mit der Rohrleitung verbunden ist, kann die Durchschallung der Rohrleitung reduziert werden, wodurch verhindert wird, dass zusätzliche, unerwünschte Störgeräusche durch die Rohrleitung in den Passagierraum gelangen können. Das erfindungsgemäße Lautsprechersystem stellt damit eine sehr einfach zu realisierende Lösung zur Verhinderung von Geräuschproblemen für Fälle dar, in denen es beispielsweise aus Bauraumgründen erforderlich ist, einen Lautsprecher außerhalb des Passagierraums des Kraftfahrzeugs anzuordnen und mittels einer Rohrleitung mit dem Passagierraum zu verbinden. The inventive sound damping device which is connected to the pipeline, the sound transmission of the pipeline can be reduced, thereby preventing that additional, unwanted noise can pass through the pipe into the passenger compartment. The loudspeaker system according to the invention thus represents a very easy to implement solution for preventing noise problems for cases in which it is necessary, for example, for space reasons to arrange a speaker outside the passenger compartment of the motor vehicle and connect by means of a pipe to the passenger compartment.
Eine besonders gute Schalldämpfung wird erreicht, wenn die wenigstens eine Schalldämpfungseinrichtung unmittelbar in wenigstens einer der Rohrleitungen angeordnet ist. Eine solche Anordnung der Schalldämpfungseinrichtung innerhalb einer Rohrleitung ist darüber hinaus konstruktiv besonders einfach zu realisieren. A particularly good sound attenuation is achieved when the at least one Sound damping device is arranged directly in at least one of the pipes. Such an arrangement of the sound damping device within a pipeline is also structurally particularly easy to implement.
Alternativ dazu kann vorgesehen sein, dass die wenigstens eine Schalldämpfungseinrichtung über wenigstens eine Verbindungsleitung mit wenigstens einer der Rohrleitungen verbunden ist. Dadurch ist es möglich, die Schalldämpfungseinrichtung an einem von der Rohrleitung unabhängigen Ort innerhalb des Kraftfahrzeugs anzuordnen, was insbesondere bei knappen Bauraumverhältnissen einen erheblichen Vorteil darstellen kann. Alternatively, it can be provided that the at least one sound damping device is connected via at least one connecting line with at least one of the pipes. This makes it possible to arrange the sound damping device at a location independent of the pipeline within the motor vehicle, which can represent a considerable advantage, especially in tight space conditions.
Dabei kann vorgesehen sein, dass die wenigstens eine Verbindungsleitung mit wenigstens einer Absperreinrichtung verschließbar ist. Auf diese Weise kann die Wirkung der Schalldämpfungseinrichtung abgeschaltet werden, indem die Absperreinrichtung die Verbindung zu derselben trennt. It can be provided that the at least one connecting line with at least one shut-off device can be closed. In this way, the effect of the sound damping device can be switched off by the shut-off device disconnects the same.
Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den restlichen Unteransprüchen. Nachfolgend sind Ausführungsbeispiele der Erfindung anhand der Zeichnung prinzipmäßig dargestellt. Further advantageous embodiments and modifications of the invention will become apparent from the remaining dependent claims. Embodiments of the invention are shown in principle with reference to the drawings.
Es zeigt: It shows:
Fig. 1 eine erste Ausführungsform des erfindungsgemäßen Lautsprechersystems; 1 shows a first embodiment of the loudspeaker system according to the invention;
Fig. 2 eine zweite Ausführungsform des erfindungsgemäßen Lautsprechersystems; 2 shows a second embodiment of the loudspeaker system according to the invention;
Fig. 3 eine erste Ausführungsform der Schaildämpfungseinrichtung für das erfindungsgemäße Lautsprechersystem; 3 shows a first embodiment of the plate damping device for the loudspeaker system according to the invention;
Fig. 4 eine zweite Ausführungsform der Schaildämpfungseinrichtung für das erfindungsgemäße Lautsprechersystem; Fig. 5 eine dritte Ausführungsform der Schalldämpfungseinrichtung für das erfindungsgemäße Lautsprechersystem; und 4 shows a second embodiment of the plate damping device for the loudspeaker system according to the invention; 5 shows a third embodiment of the sound damping device for the loudspeaker system according to the invention; and
Fig. 6 eine vierte Ausführungsform der Schalldämpfungseinrichtung für das erfindungsgemäße Lautsprechersystem. 6 shows a fourth embodiment of the sound damping device for the loudspeaker system according to the invention.
Fig. 1 zeigt ein Lautsprechersystem 1 für ein in seiner Gesamtheit nicht dargestelltes Kraftfahrzeug. Von dem Kraftfahrzeug sind ein Motorraum 2, also der Raum, in dem der nicht dargestellte Verbrennungsmotor des Kraftfahrzeugs angeordnet ist, ein Passagierraum 3 und eine den Passagierraum 3 von dem Motorraum 2 abtrennende Stirnwand 4 dargestellt. Von dem Lautsprechersystem 1 ist im vorliegenden Fall ein Lautsprecher 5 dargestellt, der außerhalb des Passagierraums 3 in einem sogenannten Wasserkasten 6 des Kraftfahrzeugs angeordnet ist, der von dem Motorraum 2 durch eine Wandung 7 abgetrennt ist. Der Lautsprecher 5 ist mittels einer Rohrleitung 8, von der ein Teil 8a durch die Stirnwand 4 verläuft, mit dem Passagierraum 3 verbunden. Auf diese Weise wird der von dem Lautsprecher 5 erzeugte Schall in den Passagierraum 3 eingeleitet, so dass der Schall die sich in dem Passagierraum 3 befindlichen Passagiere erreichen kann. Ein Teil 8b der Rohrleitung 8 verläuft außerdem von dem Lautsprecher 5 ausgehend in die entgegengesetzte Richtung und erstreckt sich durch die Wandung 7 in den Motorraum 2, wodurch das dem Lautsprecher 5 zur Verfügung stehende Volumen vergrößert wird, da dem Lautsprecher 5 über diesen Teil 8b der Rohrleitung 8 auch das Volumen des Motorraums 2 zur Verfügung steht. Es handelt sich also um ein offenes Lautsprechersystem 1. Fig. 1 shows a speaker system 1 for a motor vehicle, not shown in its entirety. From the motor vehicle, an engine compartment 2, ie the space in which the internal combustion engine, not shown, of the motor vehicle is arranged, a passenger compartment 3 and an end wall 4 separating the passenger compartment 3 from the engine compartment 2 are shown. Of the speaker system 1, a loudspeaker 5 is shown in the present case, which is arranged outside of the passenger compartment 3 in a so-called water box 6 of the motor vehicle, which is separated from the engine compartment 2 by a wall 7. The loudspeaker 5 is connected to the passenger compartment 3 by means of a pipeline 8, of which part 8a runs through the end wall 4. In this way, the sound generated by the speaker 5 is introduced into the passenger compartment 3, so that the sound can reach the passengers located in the passenger compartment 3. A portion 8b of the pipe 8 also extends from the speaker 5, starting in the opposite direction and extends through the wall 7 in the engine compartment 2, whereby the volume available to the speaker 5 is increased because the speaker 5 via this part 8b of Pipe 8 and the volume of the engine compartment 2 is available. It is therefore an open speaker system. 1
Insbesondere bietet es sich an, als Subwoofer ausgebildete Lautsprecher 5 außerhalb des Passagierraums 3 anzuordnen und über die Rohrleitung 8 mit dem Passagierraum 3 und dem Motorraum 2 zu verbinden. Die Bezeichnung "Rohrleitung" steht dabei für sämtliche Gebilde, die in der Lage sind, den Lautsprecher 5 akustisch mit einem Raum zu verbinden, in dem der Lautsprecher 5 selber nicht angeordnet ist. Selbstverständlich kann das Lautsprechersystem 1 mehr als den einen Lautsprecher 5 aufweisen, die an beliebigen, nicht dargestellten Orten in dem Kraftfahrzeug angeordnet sein können. Diese weiteren Lautsprecher müssen dabei nicht unbedingt eine offene Bauweise aufweisen. Auch der Lautsprecher 5 kann an einer vollkommen anderen Stelle des Kraftfahrzeugs angeordnet sein, beispielsweise im Bereich eines Kofferraums. Grundsätzlich kommen für das hierin beschriebene Lautsprechersystem 1 mit seinen Komponenten alternativ oder zusätzlich zu der dargestellten Anordnung auch Anordnungen im Radkasten, im Stoßfänger, im Kofferraum oder an anderen geeigneten Orten in Frage. In particular, it makes sense to arrange loudspeakers 5 designed as subwoofers outside the passenger compartment 3 and to connect them via the pipeline 8 to the passenger compartment 3 and the engine compartment 2. The term "pipe" stands for all structures that are able to connect the speaker 5 acoustically with a room in which the speaker 5 itself is not arranged. Of course, the speaker system 1 may have more than the one speaker 5, which may be arranged at any location, not shown, in the motor vehicle. These other speakers do not necessarily have one have open construction. The loudspeaker 5 can also be arranged at a completely different location of the motor vehicle, for example in the region of a boot. In principle, arrangements or arrangements in the wheel arch, in the bumper, in the boot or at other suitable locations are also possible for the loudspeaker system 1 described herein with its components as an alternative or in addition to the illustrated arrangement.
Um zu verhindern, dass aus dem Motorraum 2 bzw. in dem Fall, in dem die Rohrleitung 8 nicht bis in den Motorraum 2 verläuft, aus dem Wasserkasten 6 Geräusche durch die Rohrleitung 8 in den Passagierraum 3 gelangen können, ist mit der von dem Lautsprecher 5 zu dem Passagierraum 3 führenden Rohrleitung 8 wenigstens eine Schalldämpfungseinrichtung 9 verbunden, die so ausgebildet ist, dass sie dem Schall die Schallenergie entzieht bzw. die Schallenergie aus dem Schall aufnimmt. Im dargestellten Ausführungsbeispiel weist das Lautsprechersystem 1 zwei Schalldämpfungseinrichtungen 9 auf, von denen die eine am Ende der Rohrleitung 8 und innerhalb des Passagierraums 3 angeordnet ist und von denen die andere sich in dem von dem Lautsprecher 5 in die entgegengesetzte Richtung des Passagierraums 3 verlaufenden Teil der Rohrleitung 8 in dem Motorraum 2 befindet. Selbstverständlich könnte jedoch auf eine der beiden Schalldämpfungseinrichtungen 9, die in diesem Ausführungsbeispiel also unmittelbar innerhalb der Rohrleitung 8 angeordnet sind, verzichtet werden. To prevent that from the engine compartment 2 or in the case in which the pipe 8 does not extend into the engine compartment 2, 6 noise can pass through the pipe 8 in the passenger compartment 3 from the water tank, is with that of the speaker 5 leading to the passenger compartment 3 pipe 8 at least one sound damping device 9, which is designed so that it extracts the sound energy from the sound or absorbs the sound energy from the sound. In the illustrated embodiment, the speaker system 1, two sound attenuation devices 9, one of which is located at the end of the pipe 8 and within the passenger compartment 3 and of which the other in the running of the speaker 5 in the opposite direction of the passenger compartment 3 part of Pipeline 8 is located in the engine compartment 2. Of course, it would be possible to dispense with one of the two sound damping devices 9, which are thus arranged directly inside the pipeline 8 in this exemplary embodiment.
In den Fällen, in denen die Schalldämpfungseinrichtung 9 in dem Bereich der Rohrleitung 8 zwischen dem Lautsprecher 5 und dem Wasserkasten 6 bzw. dem Motorraum 2 oder an dem in den Motorraum 2 oder den Wasserkasten 6 ragenden Ende der Rohrleitung 8 angeordnet ist, wird die Übertragung des von dem Lautsprecher 5 erzeugten Schalls in den Passagierraum 3 durch den Teil 8a der Rohrleitung 8, der von dem Lautsprecher 5 zu dem Passagierraum 3 führt, nicht gestört. In cases where the sound attenuator 9 is disposed in the region of the pipeline 8 between the loudspeaker 5 and the water box 6 or the engine compartment 2 or at the end of the pipeline 8 projecting into the engine compartment 2 or the water box 6, the transmission becomes of the sound generated by the speaker 5 in the passenger compartment 3 through the part 8a of the pipe 8, which leads from the speaker 5 to the passenger compartment 3, not disturbed.
Fig. 2 zeigt eine alternative Ausführungsform des Lautsprechersystems 1. Hierbei ist wiederum die Rohrleitung 8 vorgesehen, welche wie bei der Ausführungsform von Fig. 1 den außerhalb des Passagierraums 3 angeordneten Lautsprecher 5 akustisch mit dem Passagierraum 3 verbindet. Im Gegensatz zu der Ausführungsform von Fig. 1 ist die Schalldämpfungseinrichtung 9 jedoch nicht unmittelbar in der Rohrleitung 8 angeordnet, sondern über eine Verbindungsleitung 10 mit der Rohrleitung 8 verbunden. Des Weiteren ist die Verbindungsleitung 10 in diesem Ausführungsbeispiel mit einer Absperreinrichtung 11 , die im vorliegenden Fall als um eine Drehachse 12 drehbare Klappe ausgebildet ist, verschließbar. Die Absperreinrichtung 11 könnte statt als um die Drehachse 12 schwenkbare Klappe auch auf andere, geeignete Weise ausgestaltet sein. FIG. 2 shows an alternative embodiment of the loudspeaker system 1. In this case, in turn, the pipeline 8 is provided which, as in the embodiment of FIG. 1, acoustically connects the loudspeaker 5 arranged outside the passenger compartment 3 with the passenger compartment 3. In contrast to the embodiment of FIG. 1, the sound damping device 9 is not arranged directly in the pipe 8, but connected via a connecting line 10 with the pipe 8. Furthermore, the connecting line 10 in this exemplary embodiment can be closed with a shut-off device 11, which in the present case is designed as a flap rotatable about a rotation axis 12. The shut-off device 11 could instead of being designed as pivotable about the axis of rotation 12 flap in other suitable manner.
Im dargestellten Zustand verschließt die Absperreinrichtung 11 die Verbindungsleitung 10 und koppelt somit die Schalldämpfungseinrichtung 9 von dem Lautsprecher 5 ab. Dagegen ist die Rohrleitung 8 geöffnet, so dass der von dem Lautsprecher 5 erzeugte Schall durch die Rohrleitung 8 in den Passagierraum 3 gelangen kann. Wenn die Absperreinrichtung 11 in ihre mit der gestrichelten Linie dargestellte Position gebracht wird, so ist die Rohrleitung 8 verschlossen und die Verbindungsleitung 10 geöffnet, wodurch die Schalldämpfungseinrichtung 9 mit dem Lautsprecher 5 verbunden ist, so dass mit derselben verhindert wird, dass aus dem Motorraum 2 oder dem Wasserkasten 6 Schall in den Passagierraum 3 gelangen kann. In the illustrated state, the shut-off device 11 closes the connecting line 10 and thus disconnects the sound damping device 9 from the loudspeaker 5. In contrast, the pipe 8 is opened, so that the sound generated by the speaker 5 can pass through the pipe 8 into the passenger compartment 3. When the shut-off device 11 is brought into its position shown by the dashed line, the pipe 8 is closed and the connecting line 10 is opened, whereby the sound damping device 9 is connected to the speaker 5, so that is prevented with the same from the engine compartment. 2 or the water box 6 sound can enter the passenger compartment 3.
Die Absperreinrichtung 11 kann über eine nicht dargestellte Steuereinrichtung so angesteuert werden, dass sie in die jeweils gewünschte Position gebracht werden kann, in der sie entweder die Rohrleitung 8 oder die Verbindungsleitung 10 zu der Schalldämpfungseinrichtung 9 verschließt bzw. freigibt. Eine solche Steuereinrichtung kann zum Beispiel an einen mit dem Lautsprechersystem 1 verbundenen Verstärker oder ähnliches angeschlossen oder in denselben integriert werden, um die Absperreinrichtung 11 in Abhängigkeit davon zu schalten, ob mit dem Lautsprechersystem 1 Schall erzeugt wird oder nicht. Die Absperreinrichtung 11 kann beispielsweise mittels eines Elektromotors verstellt werden, wobei selbstverständlich auch andere Möglichkeiten zum Schalten derselben bestehen. In dem Fall, in dem mit dem Lautsprechersystem 1 Schall erzeugt wird, wird die Absperreinrichtung 11 in die geöffnete Stellung gebracht, um den Schall über die Rohrleitung 8 in den Passagierraum 3 zu leiten. In diesem Fall sind eventuelle Störgeräusche aus dem MotorraumThe shut-off device 11 can be controlled via a control device, not shown, so that it can be brought into the respective desired position in which it closes or releases either the pipe 8 or the connecting line 10 to the sound damping device 9. Such a controller may, for example, be connected to or integrated with an amplifier or the like connected to the speaker system 1 to switch the shut-off device 11 depending on whether sound is generated with the speaker system 1 or not. The shut-off device 11 can be adjusted for example by means of an electric motor, of course, there are other options for switching the same. In the case in which sound is generated with the speaker system 1, the shut-off device 11 is brought into the open position to direct the sound via the pipe 8 into the passenger compartment 3. In this case, any noise from the engine compartment
2 bzw. dem Wasserkasten 6 nebensächlich, da der von dem Lautsprecher 5 erzeugte Schall üblicherweise lauter ist als sonstige Geräusche, so dass diese im Passa- gierraum 3 nicht hörbar sind. In dem Fall, in dem von dem Lautsprechersystem 1 kein Schall erzeugt wird, kann die Absperreinrichtung 11 in ihre die Rohrleitung 8 verschließende Position gebracht werden, um eventuelle Störgeräusche in die Schalldämpfungseinrichtung 9 zu leiten. Dass in diesem Fall die Rohrleitung 8 geschlossen ist, ist hinsichtlich der Schallübertragung unproblematisch, da der Lautsprecher 5 ja keinen Schall erzeugt. Durch die Absperreinrichtung 11 ist also sichergestellt, dass der von dem Lautsprecher 5 erzeugte Schall nicht in unerwünschter Weise durch die Schalldämpfungseinrichtung 9 gedämpft wird. 2 or the water box 6 incidentally, since the sound generated by the speaker 5 is usually louder than other noises, so that these in Passover 3 are not audible. In the case in which no sound is generated by the speaker system 1, the shut-off device 11 can be brought into its position closing the pipe 8, in order to guide possible noise in the sound damping device 9. That in this case the pipe 8 is closed, is unproblematic in terms of sound transmission, since the speaker 5 generates no sound yes. By the shut-off device 11 is thus ensured that the sound generated by the speaker 5 is not damped in an undesirable manner by the sound damping device 9.
In den Figuren 3 bis 6 sind mehrere Ausführungsbeispiele der Schalldämpfungseinrichtung 9 dargestellt. In Fig. 3 ist erkennbar, dass die Schalldämpfungseinrichtung 9 ein Gehäuse 13 aufweist, in dem sich ein Schallabsorptionsmaterial 14, wie zum Beispiel Glaswolle, Steinwolle oder ein anderes poröses bzw. offenporiges Material, befindet. Das Schallabsorptionsmaterial 14 sorgt für eine geeignete Dämpfung des aus der Rohrleitung 8 oder der Verbindungsleitung 10 in die Schalldämpfungseinrichtung 9 eintretenden Schalls. Das Schallabsorptionsmaterial 14 befindet sich dabei innerhalb des Gehäuses 3 und außerhalb der in diesem Fall mit Öffnungen versehenen, d. h. schalldurchlässigen Rohrleitung 8. In the figures 3 to 6 several embodiments of the sound damping device 9 are shown. In Fig. 3 it can be seen that the sound damping device 9 has a housing 13 in which a sound absorbing material 14, such as glass wool, rock wool or other porous or open-pored material, is located. The sound absorption material 14 ensures a suitable damping of the sound entering from the pipe 8 or the connecting line 10 in the sound damping device 9 sound. The sound absorbing material 14 is located inside the housing 3 and outside of the openings provided in this case, d. H. sound-permeable pipeline 8.
Eine alternative Ausführungsform der Schalldämpfungseinrichtung 9 ist in Fig. 4 dargestellt. Hierbei sind innerhalb des Gehäuses 13 der Schalldämpfungseinrichtung 9 mehrere Wandungen 15 vorgesehen, wobei grundsätzlich auch lediglich eine der Wandungen 15 vorgesehen sein könnte. Durch die Wandungen 15 werden Laufzeitunterschiede des in die Schalldämpfungseinrichtung 9 eintretenden Schalls erzeugt und bestimmte Frequenzen gelöscht bzw. stark abgemindert. An alternative embodiment of the sound damping device 9 is shown in Fig. 4. Here, a plurality of walls 15 are provided within the housing 13 of the sound damping device 9, wherein basically only one of the walls 15 could be provided. Through the walls 15 runtime differences of the entering into the sound attenuation device 9 sound generated and deleted certain frequencies or greatly reduced.
Bei der in Fig. 5 dargestellten Ausführungsform der Schalldämpfungseinrichtung 9 ist dieselbe als Helmholtz-Resonator ausgeführt, der nicht unmittelbar in der Rohrleitung 8 angeordnet, sondern über die Verbindungsleitung 10 mit der Rohrleitung 8 verbunden ist. Innerhalb des auch hier vorgesehenen Gehäuses 13 der Schalldämpfungseinrichtung 9 ist wiederum das Schallabsorptionsmaterial 14 angeordnet. In the embodiment of the sound damping device 9 shown in Fig. 5, the same is designed as a Helmholtz resonator, which is not arranged directly in the pipe 8, but is connected via the connecting line 10 with the pipe 8. Within the case 13 provided here of the sound damping device 9, in turn, the sound absorption material 14 is arranged.
Die in Fig. 6 dargestellte Ausführungsform der Schalldämpfungseinrichtung 9 ist eine Kombination der beiden Ausführungsformen der Figuren 3 und 5. Hierbei weist die Schalldämpfungseinrichtung 9 wiederum das Gehäuse 13 mit dem darin angeordneten Schallabsorptionsmaterial 14 auf. Zusätzlich ist über die Verbindungsleitung 10 ein weiteres Gehäuse 13 mit darin angeordnetem Schallabsorptionsmaterial 14 vorgesehen, das als Helmholtz-Resonator fungiert. The embodiment of the sound damping device 9 shown in FIG. 6 is a Combination of the two embodiments of Figures 3 and 5. Here, the sound damping device 9, in turn, the housing 13 with the sound absorbing material 14 disposed therein. In addition, via the connecting line 10, a further housing 13 is provided with disposed therein sound absorbing material 14, which acts as a Helmholtz resonator.
Im Falle der Ausführungsform der Figuren 5 oder 6 könnte in der zu der als Helmholtz-Resonator ausgebildeten Schalldämpfungseinrichtung führenden Verbindungsleitung 0 die Absperreinrichtung 11 angeordnet sein. In the case of the embodiment of FIGS. 5 or 6, the shut-off device 11 could be arranged in the connecting line 0 leading to the sound damping device designed as a Helmholtz resonator.
Sowohl mit dem Schallabsorptionsmaterial 14 als auch mit den Wandungen 15 lässt sich insbesondere frequenzselektiv eine gewünschte Reduzierung der Durchschallung durch die Rohrleitung 8 erreichen. Mit anderen Worten, es lässt sich eine frequenzselektive Abstimmung der Schalldämpfungseinrichtung 9 erreichen. Beispielsweise kann eine frequenzselektive Auslegung der Schalldämpfungseinrichtung 9 auf den Bereich zwischen 300 Hz und 1 ,5 kHz ausgelegt werden, da Motorgeräusche in diesem Frequenzbereich einen Peak aufweisen. Des Weiteren kann die Schalldämpfungseinrichtung 9 so ausgelegt werden, dass der Frequenzbereich, in dem der Lautsprecher 5 arbeitet, ausgespart wird, so dass dessen Schallerzeugung und - Übertragung nicht gestört wird. Both with the sound absorption material 14 and with the walls 15 can be achieved in particular frequency selective a desired reduction of the transmission through the pipe 8. In other words, it is possible to achieve a frequency-selective tuning of the sound damping device 9. For example, a frequency-selective design of the sound attenuation device 9 can be designed in the range between 300 Hz and 1.5 kHz, since engine noise in this frequency range has a peak. Furthermore, the sound damping device 9 can be designed such that the frequency range in which the loudspeaker 5 operates is omitted, so that its sound generation and transmission is not disturbed.
Sämtliche der hierin beschriebenen Ausführungsformen der Schalldämpfungseinrichtung 9 können miteinander kombiniert werden, wenn nicht offensichtliche Gründe dagegen sprechen. Grundsätzlich ist dabei eine parallele und/oder kaskadierende Anordnung der Schalldämpfungseinrichtungen 9 vorgesehen. All of the embodiments of the sound attenuator 9 described herein may be combined with each other, unless obvious reasons militate against it. In principle, a parallel and / or cascading arrangement of the sound damping devices 9 is provided.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Lautsprechersystem für ein Kraftfahrzeug mit wenigstens einem Lautsprecher, der außerhalb des Passagierraums des Kraftfahrzeugs angeordnet und mittels wenigstens einer Rohrleitung akustisch mit dem Passagierraum verbunden ist, dadurch gekennzeichnet, dass 1. speaker system for a motor vehicle with at least one speaker, which is arranged outside the passenger compartment of the motor vehicle and connected by means of at least one pipe acoustically with the passenger compartment, characterized in that
mit der wenigstens einen von dem wenigstens einen Lautsprecher (5) zu dem Passagierraum (3) führenden Rohrleitung (8) und/oder mit einer anderen, mit dem wenigstens einen Lautsprecher (5) verbundenen Rohrleitung (8) wenigstens eine Schalldämpfungseinrichtung (9) verbunden ist.  with the at least one pipe (8) leading from the at least one loudspeaker (5) to the passenger compartment (3) and / or with another pipe (8) connected to the at least one loudspeaker (5), at least one sound damping device (9) is.
2. Lautsprechersystem nach Anspruch 1, 2. Loudspeaker system according to claim 1,
dadurch gekennzeichnet, dass  characterized in that
die wenigstens eine Schalldämpfungseinrichtung (9) unmittelbar in wenigstens einer der Rohrleitungen (8) angeordnet ist.  the at least one sound damping device (9) is arranged directly in at least one of the pipes (8).
3. Vorrichtung nach Anspruch 1 , 3. Apparatus according to claim 1,
dadurch gekennzeichnet, dass  characterized in that
die wenigstens eine Schalldämpfungseinrichtung (9) über wenigstens eine Verbindungsleitung (10) mit wenigstens einer der Rohrleitungen (8) verbunden ist.  the at least one sound damping device (9) is connected to at least one of the pipelines (8) via at least one connecting line (10).
4. Lautsprechersystem nach Anspruch 3, 4. Loudspeaker system according to claim 3,
dadurch gekennzeichnet, dass  characterized in that
die wenigstens eine Verbindungsleitung (10) mit wenigstens einer Absperreinrichtung (11) verschließbar ist.  the at least one connecting line (10) with at least one shut-off device (11) is closable.
5. Lautsprechersystem nach einem der Ansprüche 1 bis 4, 5. loudspeaker system according to one of claims 1 to 4,
dadurch gekennzeichnet, dass  characterized in that
die Schalldämpfungseinrichtung (9) ein Schallabsorptionsmaterial (14) aufweist.  the sound damping device (9) comprises a sound absorption material (14).
6. Lautsprechersystem nach einem der Ansprüche 1 bis 5, 6. loudspeaker system according to one of claims 1 to 5,
dadurch gekennzeichnet, dass  characterized in that
die Schalldämpfungseinrichtung (9) ein Gehäuse (13) mit wenigstens einer in- neren Wandung (15) aufweist. the sound damping device (9) has a housing (13) with at least one housing neren wall (15).
7. Lautsprechersystem nach einem der Ansprüche 1 bis 6, 7. Loudspeaker system according to one of claims 1 to 6,
dadurch gekennzeichnet, dass  characterized in that
die Schalldämpfungseinrichtung (9) als Helmholtz-Resonator ausgebildet ist.  the sound damping device (9) is designed as a Helmholtz resonator.
EP13706433.3A 2012-02-24 2013-02-23 Loudspeaker system for a motor vehicle Active EP2817175B1 (en)

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DE102012003769B3 (en) 2013-07-04
US9681218B2 (en) 2017-06-13
WO2013124075A1 (en) 2013-08-29
US20150036840A1 (en) 2015-02-05

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