WO2017182377A1

WO2017182377A1 - Motor vehicle with audio system

Info

Publication number: WO2017182377A1
Application number: PCT/EP2017/058870
Authority: WO
Inventors: Dimitrios Patsouras; Thomas Gallner; Robert Joest; Johannes Kerkmann; Frank Steinmeier
Original assignee: Continental Automotive Gmbh
Priority date: 2016-04-19
Filing date: 2017-04-12
Publication date: 2017-10-26
Also published as: DE102016206599A1

Abstract

The invention relates to a motor vehicle (10) with an audio system. Said motor vehicle comprises at least one vehicle component in-coupling surface (3, 4, 5, 6), an inner chamber cover of the vehicle component or a front panel. Said audio system comprises at least one structure-borne noise converter (1, 1', 1'') which is mounted on the at least one in-coupling surface.

Description

description

Motor vehicle with audio system background of the invention

It is known for For vehicles with an audio system ^¬ equip. For this purpose, electrodynamic ^loudspeakers are usually used. Electrodynamic loudspeakers include a magnet, a plunger coil and a diaphragm. The membrane is necessary to convert the movement of the plunger into airborne sound, so as to deliver this airborne sound to the interior of the vehicle. For efficient conversion into airborne sound it is necessary for the membrane to have a certain area, since with small areas the moving air mass is too low to ensure efficient airborne sound generation.

With the use of electrodynamic loudspeakers, the need is associated to provide a relatively large amount of space for the speakers.

It is an object of the invention to provide a way to reduce the space requirement of audio systems.

This object is achieved by the subject matter of claim 1. Further features, features and advantages will become apparent with the dependent claims and the following description and the figure.

It is proposed to stimulate planar elements such as trim parts of the vehicle interior or vehicle components themselves via structure-borne sound actuators in order to realize an audio reproduction in the vehicle by the parts thus vibrated. In contrast to loudspeakers, structure-borne sound actuators come without parts such as diaphragm, bead, centering spider and loudspeaker basket, making them much smaller and lighter. Due to their smaller size (lack of membrane, etc.) structure-borne sound transducers require little space and can be positioned more flexibly in the vehicle. By a suitable positioning of body sound transducers to the action of force, efficiency, frequency bandwidth, Ab ^¬ beam characteristic and / or sound characteristics can Stalten suitable excluded. Become several different in a vehicle

Areas vibrated by structure-borne sound transducers, can be represented by a suitable selection and combination of surfaces and structure-borne sound transducers the entire audio spectrum with sufficient accuracy.

An advantage of the use of trim parts or other, already in the vehicle existing (preferably flat) components is the emission characteristics. Due to the larger, partially planar geometry creates a surface radiator or a bending wave oscillator. Such a switching source is characterized by a broad and diffuse sound radiation, which has advantages over conventionally directed and punctiform radiation of loudspeakers. Furthermore, a positive property of a surface radiator, which can be realized as described herein, is the reduced localizability of the sound source. It can reach from the broad emission characteristics better coverage of the vehicle interior even with a low number of structure-borne sound transducers. Due to the small size and reduced weight of the structure-borne sound transducer can be used and locations that would not be suitable for use in front of speakers. As a result, the arrangement of the structure-borne sound transducer is more flexible with respect to the arrangement of loudspeakers. The vehicle has a large number of stimulable surfaces. The coupling of the structure-borne sound transducer can be realized by a screw ^¬ connection, a bond, snap-in connections or by curing filler. Again, no complex installation mechanics is required, as would be required for speakers.

The introduction of force can be optimized in structure-borne sound transducers by an intermediate piece, wherein material properties and / or geometry can be configured such that it a desired radiation characteristic or a spectral bandwidth results. Such an intermediate piece can be made of Plexiglas, aluminum, thermoplastic or thermosetting plastics with or without fiber reinforcement, resin-bonded materials such as ureum or rubber.

To adapt the structure or surface quality of trim parts or other components to which a structure-borne sound transducer is attached, these can be provided with reinforcing elements. Further, relatively movable surfaces, such as a flap and a fixed Kom ^¬ component of the motor vehicle can in the closed state of

Vehicles are pressed together (i.e., come in positive or non-positive connection), for example, by an intermediate part is inserted, which is the sound-transmitting

Connects between the two components when the vehicle or the movable surface or flap is closed.

A motor vehicle with an audio system is described which comprises at least one coupling surface of a vehicle component, an interior trim of the vehicle component or an end wall. The audio system comprises at least one structure-borne sound transducer, which is attached to the coupling surface. The coupling surface, the interior lining or the end wall are usually part of the motor vehicle, but this part of the vehicle acts as part of the audio system by the attachment of a structure-borne sound transducer. Therefore, the coupling surface, the vehicle component, the interior trim and / or the end wall can be seen as part of the motor vehicle in general or as part of the audio system ^¬ .

The audio system includes, for example, several structure-borne sound ^{¬ converter} . These can be introduced at different points of the coupling surface. The structure-borne sound transducers are connected to outputs of an audio amplifier. The outputs of the audio amplifier have different Audi ^¬ o spatial orientations. Different Audi ^¬ o spatial orientations are about left / right, up / down, front / rear or other positions within the vehicle that are provided at different positions of the vehicle.

At least one structure-borne sound transducer is arranged on a coupling surface, which is formed by an inner lining of a door or flap. Alternatively or in combination with this, at least one structure-borne sound transducer can be arranged on a coupling surface which is formed by a lining of a pillar of the vehicle. In this case, the A-, B-, or C-pillars come into consideration, whereby D-pillars are also suitable, provided that the column in question is provided in the vehicle. Alternatively or in combination therewith, at least one body sound transducer may be disposed on a coupling surface, of an inner panel of a center console, a headliner, an instrument panel, a fitting ^¬ board, a fund, a trunk, a rear parcel shelf, a loading floor (a trunk) and / or an inside of the trunk is formed. This arrangement ^options be ^¬ meet panels, which in particular directly adjacent to the free interior of the motor vehicle.

Furthermore, structure-borne sound transducers can alternatively or in combination with the aforementioned attachment locations on claddings also be fastened directly to vehicle components. This relates to vehicle components that are provided with a fairing, and vehicle components whose surface is directly adjacent to the free vehicle interior or in the trunk. At least one structure-borne sound transducer may be arranged on a coupling surface, which may be from a door inner side, a pillar of the vehicle (A, B, C and / or D pillar), from a center console, from a headliner, from an instrument panel, from a vehicle Dashboard, is formed by walls of the fund or the trunk, from the rear shelf and / or from the loading floor of the trunk. Here, the at least one structure-borne sound converter is not attached to a cover of a component of the vehicle, but to the component itself.

The term "arrangement of a structure-borne sound transducer at a coupling surface" means that this is fixed there, especially sound transmitting. The attachment forms a mechanical connection via which structure-borne noise from the structure-borne sound transducer to the relevant component (ie

Component of the vehicle itself or its fairing). The mechanical connection is a material ^¬ positive, non-positive or positive connection.

At least one structure-borne sound transducer may further be arranged on a coupling surface which is formed by a sun visor, an inner lining, a glove box flap, a mirror or a display panel. As an inner lining of the glove compartment door that is referred to, which is adjacent to the free interior space of the motor vehicle at ^¬. Thus, it is also possible to provide components within the vehicle with a structure-borne sound converter which do not form the envelope of the interior or of the trunk but which protrude into the interior, such as interior mirrors or sun visors. The coupling surface may be provided with stiffeners configured to influence the coupling acoustic properties of the coupling surface. Here Ver ^¬ clothing parts can be provided with additional reinforcements that transmit at least a portion of the structure-borne noise that is emitted by the relevant structure-borne sound transducer. Furthermore, the stiffeners are used to change the transmission of bending waves or structure-borne sound waves within the relevant component or cover acoustically effective (compared to panels or components without stiffeners). As acoustic coupling properties, on the one hand, the properties that are relevant for the transmission of structure-borne noise within the component or the cladding, and it is also referred to properties that are relevant for the conversion of structure-borne noise within the stiffening or the component in airborne sound.

Furthermore, it can be provided that the component (ie panel or part of the vehicle) which forms the coupling surface is acoustically separated from adjacent components. is ordered. For this purpose, acoustic separating elements may be used, for example foam, or it may be designed to dampen the mounting or mounting of the component in question.

The audio system is preferably set up to deliver an audio signal to at least one sound transducer that extends over the entire audible range. The audio system therefore preferably not only reproduces part of the spectrum to the body sound transducers so that the structure-borne sound transducers cover the entire audible spectrum. Alternatively, it can be provided that the sound transducers receive only depths or only center frequencies or only heights from the audio system, wherein preferably several sound transducers together can image the entire spectrum and correspondingly different with audio signals

Spectral ranges are controlled. For example, one of a plurality of sound transducers may be supplied with an audio signal that contains only low or only highs of a signal of an audio source.

The audible spectrum is defined as audio signals with a lower limit frequency of at least 10, 16 or 20 Hz. The upper limit can be 10, 12, 16, 20 or 24 kHz. The heights may be audio signals above a frequency of at least 1, 2, 5 or 8 kHz. Bass can be defined as audio signals with a maximum frequency of not more than 50, 80 or 120 Hz.

The audio system can be equipped with at least one audio source that is set up to issue warnings, assistance ^notes , functional hints of vehicle components, acoustic marking signals or hi-fi audio signals. As warnings come in particular (possibly synthetic) sounds of a hazard warning lights or a spacer system in question. As an assistant notes are particularly evidence of a driver's assistant ^¬ system in question, or a navigation system. Functional indications are in particular (possibly synthetic) noises of a direction indicator. Acoustic marker signals are signals that change the sound used by a vehicle component, such as brakes, doors or the like. The acoustic cue signals are set to change the acoustically ^¬-Nazi overall impression. Hifi audio signals are signals from an entertainment system, an infotainment system, a car radio or an audio player.

Furthermore, glass surfaces or small parts, technical equipment and accessories for audio reproduction can be used, for example, seats or the floor (ie Bo ^¬ denabdeckungen or the vehicle floor itself). These can also be provided with at least one structure-borne sound transducer.

A structure-borne sound transducer may comprise a mass element, an acoustic coupling element and a longitudinal actuator, which is arranged between these elements. The longitudinal actuator is usually an electrodynamic actuator, for example a plunger coil within a magnet or more generally a coil within a magnetic field, preferably a permanent magnet. The actuator is set to change its length. If this is actuated, the change in length has an effect on the distance between the mass element and the coupling element. Due to the inertia of the mass element, the resulting movement is emitted essentially via the coupling element, in particular on a coupling surface, a component or a lining to which the transducer is attached. In this case, the coupling element contacts the component or lining directly or via force-transmitting or movement-transmitting intermediate pieces.

A structure-borne sound transducer may further comprise a piezoelectric element. This comprises electrodes between which a piezoelectric layer is located. This layer or one of the electrodes can form or have an acoustic coupling element, in particular in the form of a (bendable) plate, for example a sheet metal. The structure-borne noise generated by the piezo element is introduced via the coupling element into the component to which the piezo structure-borne sound transducer is attached. The structure-borne sound converter can be designed piezoelectrically or electrodynamically.

As a vehicle component, in particular a part of the body is called, in particular supporting or protective elements of the vehicle.

1 shows a vehicle 10 with structure-borne sound transducers 1, 1 ^λ and 1 ^{λ λ} , which are arranged at different components and locations. An A-pillar 2 or its cladding is provided with a sound transducer 1. Furthermore, a door 3 or its cladding is provided with a sound transducer. This is especially true for front and rear doors. A headliner 4 is also provided with a structure-borne sound converter. In addition, a loading floor 5 (of the trunk) can be provided with a sound transducer 1.

Finally, an end wall 6 is shown, which separates the (front) engine compartment from the interior of the vehicle. At the front wall several structure-borne sound transducers 1, 1 ^λ and 1 ^{λ λ are} attached. This serves to illustrate that a component, in this case the end wall 6, can be provided with one or more sound transducers 1, 1 ^λ and 1 ^{λ λ} . The structure-borne sound transducers 1, 1 ^λ and 1 ^{λ λ} are arranged at different positions on the end wall. In general, it should be shown that the components of the vehicle or their panels may have structure-borne sound transducers at different locations. Structure-borne sound transducers can therefore be attached to several positions of the same component or its cladding.

As an end wall can generally be the conclusion of the front

End of the motor vehicle interior are called, or even a conclusion of the interior of the rear side of the vehicle interior. The end wall can thus be provided between the vehicle ^¬ interior and engine compartment or between the vehicle interior and trunk. The end wall is present in almost all motor vehicles and is provided according to the invention with at least one structure-borne sound transducer. The front wall becomes also known as bulkhead. The front wall is, in particular, behind the dashboard or behind the telkonsole With ^¬ (seen from the vehicle interior free). Further, the vehicle 10 includes an audio amplifier 20 having multiple outputs 22. The audio amplifier 20 is typically located within the vehicle or interior. The illustration of FIG. 1 is purely schematic in this regard for the sake of clarity and serves only to illustrate the connections and the connections of the elements with the reference symbols 1, 1 ^λ , 1 ^{λ λ} , and 20-32.

The outputs 22 are assigned to different audio spatial orientations, for example, front left, front right, rear left and rear right, although at least one output can not be associated with any spatial orientation (such as a bass output). Via the outputs 22, the audio amplifier 20 outputs at least one audio signal 24 to the sound transducers. For a better overview, the individual connections or audio signals for the individual transducers 1, 1 ^λ and 1 ^{λ λ are} not shown, but schematically represented by the audio signal 24 shown as an arrow ^¬ .

The audio amplifier is controlled by at least one audio source 30, 32. An audio source thereof may be an infotainment system 30, while another audio source 32 is formed, for example, by a controller which issues warning or assistance indications as an audio signal. Funktionshin ^¬ how alarms o. Ä., Which represent the operating state of vehicle components, can be submitted by an audio source 32. As an example of an audio source 32 may be mentioned a control device which emits an audio signal which characterizes the operation of a direction indicator. Further warnings may be, for example, a warning of a distance control system. Reference sign list

Borne drivers

pillar

doors

headliner

load floor

bulkhead

Stiffeners in the loading floor

motor vehicle

Audio Amplifier

Outputs of the audio amplifier

audio signal

Audio sources

Claims

claims

A motor vehicle (10) having an audio system, comprising:

- At least one coupling surface of a Fahrzeugkom ^¬ component, an interior trim (2-5) of the vehicle component or an end wall (6), wherein the audio system comprises at least one structure-borne sound transducer (1) which is attached to the coupling surface.

Motor vehicle according to claim 1, wherein the audio system comprises a plurality of structure-borne sound transducers (1, 1 ^λ , 1 ^{λ λ} ), which are mounted at different locations of the coupling surface and connected to outputs (22) of an audio amplifier (20), wherein the outputs (22) have under ^¬ schiedliche Audio-space orientations.

Motor vehicle according to claim 1 or 2, wherein at least one structure-borne sound transducer (1) is arranged on a coupling surface of an inner panel (3) of a door, a pillar of the vehicle (2), a center console, a headliner (4), an instrument panel , a dashboard, a fund, a trunk, a rear shelf, a loading floor (5) of the trunk or an inside of the trunk is formed.

Motor vehicle according to one of the preceding claims, wherein at least one structure-borne sound transducer is arranged on a coupling surface, of a door inner side (3), of a pillar (2) of the vehicle, from a ^¬ telkonsole, from a headliner (4), of of an instrument panel of interior walls of the fund or the trunk, from the rear shelf or from the loading floor (5) of the boot is formed of a tabular Instru ^¬ ment.

Motor vehicle according to one of the preceding claims, wherein at least one structure-borne sound transducer (1) is arranged on a coupling surface, which is formed by a sun visor, an inner lining of a glove box flap, a mirror or a display panel. Motor vehicle according to one of the preceding claims, wherein the coupling-in surface is provided with stiffeners (7) which are designed to influence the acoustic coupling properties of the coupling-in surface.

Motor vehicle according to one of the preceding claims, wherein the component which forms the coupling surface, is arranged acoustically separated from adjacent components.

Motor vehicle according to one of the preceding claims, wherein the audio system is adapted to deliver an audio signal (24) to the at least one sound transducer (1, 1 ^λ , 1 ^{λ λ} ), which extends over the entire audible range.

Motor vehicle according to one of the preceding claims, wherein the audio system is equipped with at least one audio source (30, 32), which is set up, warnings, assistance hints, hints of Fahrzeugkompo ^¬ components, acoustic masking signals or

Hifi audio signals.