EP4226650B1 - Vorrichtung zur verarbeitung eines signals, audiosystem, lautsprecher, akustischer resonator und damit ausgestattete fahrzeugtür - Google Patents

Vorrichtung zur verarbeitung eines signals, audiosystem, lautsprecher, akustischer resonator und damit ausgestattete fahrzeugtür

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Publication number
EP4226650B1
EP4226650B1 EP21807171.0A EP21807171A EP4226650B1 EP 4226650 B1 EP4226650 B1 EP 4226650B1 EP 21807171 A EP21807171 A EP 21807171A EP 4226650 B1 EP4226650 B1 EP 4226650B1
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EP
European Patent Office
Prior art keywords
loudspeaker
signal
input signal
acoustic
processing device
Prior art date
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Active
Application number
EP21807171.0A
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English (en)
French (fr)
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EP4226650A1 (de
EP4226650C0 (de
Inventor
Alexis POTRON
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Focal JMLab SAS
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Focal JMLab SAS
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Publication of EP4226650A1 publication Critical patent/EP4226650A1/de
Application granted granted Critical
Publication of EP4226650B1 publication Critical patent/EP4226650B1/de
Publication of EP4226650C0 publication Critical patent/EP4226650C0/de
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/007—Protection circuits for transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/02—Circuits for transducers for preventing acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/04—Circuits for transducers for correcting frequency response

Definitions

  • the invention relates to the field of sound processing devices, i.e. devices generating an analog or digital output signal, designed to power a loudspeaker from an analog or digital input signal.
  • the invention relates to a device for processing an analog or digital signal making it possible to limit the non-linearities of the loudspeaker with which it is associated. More precisely, the invention advantageously makes it possible to reduce the sound distortions of the loudspeaker while maintaining a large amplitude of sound intensity.
  • the invention integrates the acoustic load seen by the loudspeaker and finds a multitude of applications, including the use of the loudspeaker in simple or complex acoustic enclosures and resonators.
  • the invention finds, for example, a particularly advantageous application for sound reinforcement in a vehicle door requiring ever smaller and lighter loudspeakers.
  • a loudspeaker is a device that converts an electrical signal into acoustic waves.
  • a loudspeaker's motor typically consists of a permanent magnet and a coil that moves within the magnet's field.
  • the electrical signal at the speaker's terminals is converted into an electric current that flows through the coil. This current sets the coil in motion, transmitting this driving force to a membrane that, in turn, generates a compression wave in the surrounding air.
  • the acceleration of the coil is proportional to the current flowing through it.
  • the higher the current flowing through the coil the more the loudspeaker exhibits non-linearities leading to potentially audible distortions of the sound produced by the loudspeaker.
  • Non-linearities can come in particular from the lack of uniformity of the magnetic field in which the coil is immersed. Indeed, the more the electric current circulating in the coil is intense, the greater the amplitude of displacement it will have, going so far as to partially leave the zone where the magnetic field of the magnet is uniform.
  • Nonlinearities can still arise from the acoustic load of the loudspeaker and be due, for example, to the presence of vibrations or acoustic short circuits at the level of the acoustic load seen by the loudspeaker.
  • loudspeakers It is possible to delay the appearance of these non-linearities by increasing the dimensions of the loudspeaker.
  • loudspeakers there is a real need to miniaturize loudspeakers to provide sound for increasingly lighter and more compact surfaces.
  • car manufacturers want to reduce the size and weight of vehicles as much as possible to minimize fuel consumption.
  • the aim is to integrate small loudspeakers, i.e., loudspeakers with a membrane diameter of less than 10 cm. A compromise is therefore made between sound quality and the space left available for the loudspeaker.
  • the document US 2017/0019732 describes a processing device 300 shown schematically on the figure 1 of the state of the art.
  • This processing device 300 receives an analog input signal Si and provides an analog output signal So to power a loudspeaker 13 via an amplifier 18.
  • the processing device 300 comprises a module 310 for estimating the expected displacements Da of the membrane of the loudspeaker 13 as a function of the analog input signal Si. From these expected displacements Da, a module 320 determines the signal So to be transmitted to the loudspeaker 13 to obtain the expected displacements Da, taking into account the non-linearities of the loudspeaker 13.
  • the module 320 uses a mathematical model that takes into account the non-linearities of a loudspeaker and makes it possible to modify, in real time, the analog control signal of the loudspeaker to produce a sound with reduced distortions by limiting the frequency and/or the intensity of the analog signal only when the mathematical model indicates that distortions are likely to appear on the loudspeaker.
  • This control system effectively limits loudspeaker distortion and maintains the sound volume as long as the electrical signals sent to the loudspeaker do not risk damaging it.
  • the mathematical model detects a risk of electrical and/or mechanical damage to the loudspeaker, the electrical signal sent to the loudspeaker is restricted and has an upper limit of sound amplitude, beyond which the user can no longer increase the sound volume, even by applying a larger control.
  • the determination module being configured to solve a system of coupled differential equations aimed at determining the signal to be transmitted to the loudspeaker to obtain the expected displacement of the membrane, the system of coupled differential equations representing the loudspeaker, considered as a non-linear transducer.
  • the technical problem that the invention seeks to solve is to implement a loudspeaker control system that limits distortion while maintaining greater freedom of control by the user.
  • the invention proposes, according to claim 1, to process only part of the input signal, using a module for estimating the expected movements and a module for determining the control signal to be applied to obtain movements close to the expected movements, and not to process the remaining part of the input signal.
  • a loudspeaker has characteristics and geometry. Characteristics are physical quantities such as the mass of the moving part, the mechanical strength or the compliance of the loudspeaker suspensions.
  • the geometry of the loudspeaker may correspond to the mechanical dimensions, such as the radiating surface of its membrane. Depending on the characteristics and geometry taken into account, the resulting equations may be linear or non-linear.
  • the coupled differential equations are solved as a function of the expected displacements of the membrane of the loudspeaker associated with the device of the invention.
  • the estimation module determines the expected displacement of the membrane as a function of the input signal. For a very simplified example, if the input signal corresponds to a sinusoidal signal with a frequency of 440 Hz, the expected displacement of the membrane is sinusoidal, of the same frequency, and the expected sound signal created by the loudspeaker corresponds to the musical note "A", free of distortion. Depending on the desired amplitude of this sound response, the non-linearities of the loudspeaker can degrade the quality of the sound response.
  • the resolution of the system of coupled differential equations aims to determine what real electrical signal must be transmitted to the loudspeaker to obtain the expected displacement of the membrane, and therefore the expected sound response.
  • the adaptive control signal is thus generated following the resolution of the coupled differential equation system by the determination module. If the expected control signal is analog, this control signal is conventionally obtained by a digital/analog converter after a digital resolution of the coupled differential equation system.
  • the sampling frequency for generating the adaptive control signal is chosen to be as high as possible while remaining calibrated to the resolution speed of the coupled differential equations, so as to limit the distortions introduced by the digital/analog conversion.
  • the system of coupled differential equations preferentially integrates parameters representing the loudspeaker, considered as a nonlinear transducer, and the parameters of the loudspeaker's environment, typically its acoustic load.
  • the system of coupled differential equations preferentially integrates the geometric definition and the linear and nonlinear characteristics of the loudspeaker.
  • the system of coupled differential equations preferentially integrates the geometric definition and the characteristics of the environment, possibly estimated from hypotheses on the variations of air flow at the loudspeaker and in its environment.
  • the determination module preferentially receives measurements of operating parameters of the loudspeaker, so that the system of coupled differential equations of the determination module also integrates the evolution of the loudspeaker parameters over time.
  • the loudspeaker parameters are likely to evolve over the time of use of the loudspeaker.
  • the impedance increases with the heating of the coil, as does the flexibility of the suspensions.
  • the device includes, for example, a feedback loop with sampling of voltage and current information at the loudspeaker and the system of coupled differential equations can be solved in real time by taking this information into account so as to improve the generation accuracy of the adaptive control signal.
  • This implementation is based on the observation that low frequencies are most distorted. Therefore, focusing processing on low frequencies reduces processing time and memory usage, as processing high-frequency signals requires a much higher sampling rate and processing time.
  • This embodiment also allows an unprocessed part to be transmitted at low frequency.
  • the distribution of the input signal between the different lines can be modulated according to requirements.
  • the processing line and the at least one transmission line preferably include a weighter to control the fraction of the signal addressed.
  • the transmission lines allow the user to increase the volume beyond the limiting conditions imposed by the determination module to limit loudspeaker distortion, increasing the volume by the user may drive the loudspeaker into an operating region that may degrade it.
  • the input signal and/or the output signal is an analog signal.
  • the input signal and/or the output signal is a digital signal.
  • a signal may correspond to an analog or digital signal.
  • An example is notably presented with an analog input signal.
  • the invention relates to a processing device 30a in which an input signal Si is distributed between two separate lines: a transmission line L1 and a processing line Lt.
  • the processing line Lt comprises a module 31 for estimating the expected displacements Da of the membrane of a loudspeaker 13 as a function of the input signal Si, as well as a module 32 for determining the adaptive control signal CmdA to transmit to the loudspeaker 13 to best approach the expected displacements Da, while taking into account the non-linearities of the loudspeaker 13.
  • the weighter ⁇ as well as the low-pass filter 16 of the processing line Lt can be placed before the estimation module 31 of the expected displacements Da.
  • the determination module 32 may possibly lead to the delivery of electrical signals exceeding a threshold value for degradation of the loudspeaker 13 and a compressor and/or limiter 10 may be arranged to restrict the electrical signal from the determination module 32.
  • this processing line Lt comprises: the weighter adjusting the gain ⁇ , then the estimation module 31, another compressor and/or limiter 11, the determination module 32 as well as the compressor-limiter 10 configured to electrically protect the loudspeaker 13.
  • the loudspeaker 13 can be controlled by current or voltage, so that the processing devices 30a-30e of the figures 2 to 6 can be used to deliver an output signal So in current or voltage.
  • the estimation module 31 is still connected to the voltage information of the input signal Si. Indeed, such an estimation module 31 is simpler to produce on the basis of the estimation of the voltage.
  • the expected displacements Da are conventionally expressed in units of distance and the determination module 32 can just as easily be configured to provide an adaptive control signal CmdA in current or voltage.
  • the injected input signal Si is a voltage Si(t) for the processing line Lt and a current Si(c) for the two transmission lines L1 and L2.
  • the determination module 32 is configured to provide an adaptive control signal CmdA(c) in current. To do this, the signal Si(t) can be directly taken from the input signal and the signal Si(c) can come from a model and be calculated by the expected current estimation module 34.
  • FIG 7 represents the real-time consideration of changes in the electrical and/or mechanical parameters of the loudspeaker 13 during operation.
  • the instantaneous values of voltage Uhp at the loudspeaker terminals and current Ihp flowing in the coil are sent to the module 35 for adjusting the electrical and/or mechanical parameters of the loudspeaker.
  • the latter are manipulated by the adaptive signal control determination block 32 CmdA(c).
  • the determination module 32 is configured to solve a system of coupled differential equations representing the nonlinearities of the loudspeaker 13 and the characteristics of the environment of the loudspeaker 13.
  • FIG. 8 details the principle of processing by module 35 of the instantaneous values of voltage Uhp and current Ihp at the loudspeaker 13.
  • the instantaneous values of voltage Uhp and current Ihp are recorded during a given observation period.
  • a time weighting, typically a Hanning weighting, can be applied.
  • the module 35 then performs a first step 100 of calculating the frequency spectrum of the instantaneous values of voltage Uhp and current Ihp.
  • the algorithm known as “fast fourier transform” can be used to calculate these spectra.
  • the “fast fourier transform” algorithm can be configured with a sampling frequency of 44100Hz and a capture of 2048 points. Thus, 323 pairs of spectra of the voltage Uhp and the current Ihp are obtained.
  • the spectra obtained contain noise.
  • the second step 101 is a statistical exploitation of the spectra obtained, aiming in particular to eliminate unusable spectra and to eliminate the noise by averaging over several measurements. This exploitation can, for example, be based on the analysis of the histogram of the spectra.
  • step 105 of calculating the dynamic DC resistance Re is carried out.
  • the dynamic resonant frequency fs is calculated in step 106, then the dynamic mechanical compliance Cms (x) of the suspensions of the loudspeaker 13 is estimated from the dynamic resonant frequency fs in step 107.
  • the value of the dynamic continuous resistance Re of the loudspeaker corresponds to the limit of the impedance modulus for frequencies tending towards zero and the value of the dynamic resonance frequency fs of the loudspeaker corresponds to the first non-zero frequency of phase cancellation according to increasing frequencies.
  • the module 35 for adjusting the electrical and/or acoustic parameters makes it possible to estimate the variations during operation of the loudspeaker 13 of the two parameters Re and Cms (x) manipulated by the module 32 for determining the adaptive control signals CmdA, CmdA (c).
  • the vibrating parts of the assembly consisting of the loudspeaker and its acoustic load are identified.
  • the vibrating parts designate all the parts of the loudspeaker and its environment whose vibrations are directly or indirectly linked to the movement of the membrane.
  • These vibrating parts form a partition, in the mathematical sense, of all the vibrating parts of the loudspeaker and its environment, due to a coupling, in the mechanical and/or acoustic sense, with the loudspeaker membrane.
  • FIG. 9 illustrates a concrete example of the environment of a loudspeaker 13 positioned in a closed acoustic enclosure.
  • FIG. 10 illustrates a concrete example of the environment of a loudspeaker 13 positioned in an acoustic enclosure comprising a vent 90.
  • FIG 11 illustrates a concrete example of the environment of a loudspeaker 13 positioned in an acoustic enclosure comprising a radiator 91.
  • FIG. 13 illustrates a concrete example of the environment of a loudspeaker 13 positioned in a vehicle door.
  • These volumes 86, 88 are typically filled with air. Furthermore, these air volumes 88 and 86 are connected by acoustic bridges potentially comprising a clear acoustic short circuit 84 and at least one sealing sheet 83 comparable to a membrane.
  • the loudspeaker 13 radiates into the passenger compartment and may be covered with open-cell foam or a grille 87 to improve the aesthetics of the door. However, given the significant acoustic transparency of this foam or grille, this member 87 will not be taken into consideration in this diagram.
  • the door panel 85 is acoustically comparable to a membrane also radiating into the passenger compartment.
  • frequencies f 1 -f N for which the moduli of the differences in electrical impedances between the loudspeaker mounted in its environment and the loudspeaker in the open air are as large as possible.
  • the device can therefore comprise a feedback port for the current and voltage transmitted to the loudspeaker 13 to transmit these values to the processing module 35, said module 35 delivering the values of Re and Cms (x) to the module 32 for determining the adaptive control signal CmdA.
  • the determination module 32 receives measurements of operating parameters of the loudspeaker 13, so that the system of coupled differential equations of the determination module 32 also integrates the evolution of the parameters of the loudspeaker 13 over time.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • General Health & Medical Sciences (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Circuit For Audible Band Transducer (AREA)

Claims (16)

  1. Vorrichtung zur Verarbeitung (30a-30f) eines Eingangssignals (Si), die ein Ausgangssignal (So) erzeugt, bestimmt zur Einspeisung in einen Lautsprecher (13), direkt oder indirekt über einen Verstärker (18), diese Vorrichtung umfasst eine Verarbeitungsleitung (Lt), die aus Folgendem besteht:
    ein Modul zum Schätzen (31) der erwarteten Bewegungen (Da) des Lautsprechers (13) auf der Grundlage des Eingangssignals (Si); und
    ein Modul zur Bestimmung (32) eines adaptiven Steuersignals (CmdA), das an den Lautsprecher (13) zu übertragen ist, also ein Signal, das digital bestimmt wird auf Grundlage einer erwarteten Bewegung der Membran; und
    die Verarbeitungsvorrichtung (30a-30f) enthält außerdem:
    mindestens eine Übertragungsleitung (L1, L2, L2') für das Eingangssignal (Si), die mindestens ein nicht-adaptives Steuersignal (Cmdl, Cmd2) liefert, das heißt ein Signal, das direkt oder indirekt vom Eingangssignal (Si) stammt; und
    einen Summierer (14), der das Ausgangssignal (So) liefert, durch Addition des adaptiven Steuersignals (CmdA) und des mindestens einen nicht-adaptiven Steuersignals (Cmdl, Cmd2),
    das Bestimmungsmodul (32) ist konfiguriert zur Lösung eines Systems gekoppelter Differentialgleichungen, die zum Ziel haben, das an den Lautsprecher (13) zu übertragende Signal zu bestimmen, um die erwartete Membranbewegung zu erhalten, das Systems gekoppelter Differentialgleichungen repräsentiert dabei den Lautsprecher (13), der als nichtlinearere Wandler betrachtet wird,
    dadurch gekennzeichnet, dass die Differentialgleichungen auch die Umgebung des Lautsprechers (13) repräsentieren).
  2. Verarbeitungsvorrichtung nach Anspruch 1, bei der die Verarbeitungsleitung (Lt) einen Tiefpassfilter (16) enthält und eine Übertragungsleitung (L1) des Eingangssignal (Si) einen Hochpassfilter (15) enthält.
  3. Verarbeitungsvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Verarbeitungsvorrichtung (30a-30f) zwei Übertragungsleitungen , (L1, L2, L2') des Eingangssignals (Si) enthält, die zwei nicht adaptive Steuersignale (Cmdl, Cmd2) liefern: eine erste Übertragungsleitung (Ll), die den Hochpassfilter (15) enthält; und eine zweite Übertragungsleitung (L2, L2'), die einen Tiefpassfilter (17, 17') enthält.
  4. Verarbeitungsvorrichtung nach einem der Ansprüche 1 bis 3, bei der die Verarbeitungsleitung (Lt) und die mindestens eine Übertragungsleitung (L1, L2, L2') einen Gewichter enthält, der eine Gewichtung (α, β, γ) anlegt.
  5. Verarbeitungsvorrichtung nach einem der Ansprüche 1 bis 4, bei der, wenn das Ausgangssignal (So) einem Stromsignal entspricht, das Schätzmodul (31) mit der Spannung des Eingangssignals (Si) verbunden ist, während die mindestens eine Übertragungsleitung (L1, L2, L2') mit einer Modellierung des durch die Spule des Lautsprechers (13) fließenden Stroms, der aus dem Eingangssignal (Si) hervorgegangen ist, verbunden ist, das Bestimmungsmodul (32) ist konfiguriert zur Bestimmung eines adaptiven Stromsteuersignals (CmdA).
  6. Verarbeitungsvorrichtung nach einem der Ansprüche 1 bis 5, bei der die mindestens eine Übertragungsleitung (L1, L2, L2') und/ oder die erwähnte Verarbeitungsleitung (Lt) einen Kompressor und/ oder Begrenzer (21, 21') enthält, konfiguriert zur Begrenzung des Steuersignals (Cmd2, CmdA) wenn es einen Verschlechterungsgrenzwert des Lautsprechers (13) übersteigt und einen Kompressor und/ oder Begrenzer (11) zur Filterung nicht realistischer Lösungen, auf die dieses Bestimmungsmodul (32) konvergieren kann.
  7. Verarbeitungsvorrichtung nach einem der Ansprüche 1 bis 6, bei der die erwähnte Verarbeitungsleitung (Lt) einen Kompressor und/ oder Begrenzer (10) enthält, konfiguriert zur Begrenzung des Steuersignals (CmdA) wenn es einen Verschlechterungsgrenzwert des Lautsprechers (13) übersteigt.
  8. Verarbeitungsvorrichtung nach einem der Ansprüche 1 bis 7, bei der das Bestimmungsmodul (32) Messungen der Funktionsparameter des Lautsprechers (13) erhält, so dass das System der gekoppelten Differentialgleichungen des Bestimmungsmoduls (32) auch die Entwicklung der Lautsprecherparameter (13) über die Zeit integriert.
  9. Vorrichtung nach einem der Ansprüche 1 bis 8, bei der das Eingangssignal (Si) und/ oder das Ausgangssignal ein analoges Signal ist.
  10. Audio-System mit einer Verarbeitungsvorrichtung (30a-30f) nach einem der Ansprüche 1 bis 8, das das Ausgangssignal (So) ausgehend vom Eingangssignal (Si) erzeugt,
    und einem Lautsprecher (13), verbunden mit dem Ausgangssignal (So) über einen Verstärker (18).
  11. Akustisches Gehäuse, bestehend aus einem Kasten (89) und einem Audio-System nach Anspruch 10;
    die gekoppelten Differentialgleichungen repräsentieren dabei:
    - die geometrische Definition und die Eigenschaften des Lautsprechers (13); und
    - die Abmessungen des Kastens (89).
  12. Akustisches Gehäuse nach Anspruch 11, dadurch gekennzeichnet, dass es mindestens einen Kanal (90); enthält, die gekoppelten Differentialgleichungen repräsentieren außerdem:
    - die Eigenschaften des mindestens einen Kanals (90).
  13. Akustisches Gehäuse nach Anspruch 11, dadurch gekennzeichnet, dass es mindestens einen Radiator (91) enthält; die gekoppelten Differentialgleichungen repräsentieren außerdem
    - die Eigenschaften des mindestens einen Radiators (91).
  14. Akustik-Resonator, mit mindestens zwei Kästen (921 - 92ρ) die über mindestens einen Kanal und/ oder mindestens eine Schallbrücke verbunden sind und der ein Audio-System nach Anspruch 10 enthält; die gekoppelten Differentialgleichungen repräsentieren:
    - die geometrische Definition und die Eigenschaften des Lautsprechers (13); und
    - die Abmessungen jedes Kastens (931 - 93ρ); und
    - die Eigenschaft des mindestens einen Kanal und/ oder der mindestens einen Schallbrücke (931 - 93ρ-1).
  15. Fahrzeugtür mit Lautsprecher mit einem Audio-System nach Anspruch 10.
  16. Fahrzeugtür mit Lautsprecher nach Anspruch 15, dadurch gekennzeichnet, dass die gekoppelten Differentialgleichungen repräsentieren:
    - die geometrische Definition und die Eigenschaften des Lautsprechers (13); und
    - die Eigenschaften der Türverkleidung (85);
    - die Abmessungen der verschiedenen Volumina (86, 88) der Tür: das Volumen des Kastens (88), der den Lautsprecher (13) enthält und das Umfangsvolumen (86), gebildet zwischen einer Vorderseite (81) dieses Kastens und der Türverkleidung (85); und
    - die Eigenschaften der Schallbrücken zwischen diesen Volumina (86, 88) der Tür, die Schallbrücken bestehen dabei aus mindestens einer Abdichtung (83) und eventuellen akustischen Kurzschlüssen.
EP21807171.0A 2020-10-12 2021-10-12 Vorrichtung zur verarbeitung eines signals, audiosystem, lautsprecher, akustischer resonator und damit ausgestattete fahrzeugtür Active EP4226650B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2010426A FR3115176B1 (fr) 2020-10-12 2020-10-12 Dispositif de traitement d’un signal analogique, systeme audio et porte sonorisee de vehicule associes
PCT/FR2021/051771 WO2022079384A1 (fr) 2020-10-12 2021-10-12 Dispositif de traitement d'un signal, systeme audio, enceintes acoustiques, resonateur acoustique, et porte sonorisee de vehicule associes

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EP4226650A1 EP4226650A1 (de) 2023-08-16
EP4226650B1 true EP4226650B1 (de) 2025-08-13
EP4226650C0 EP4226650C0 (de) 2025-08-13

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EP21807171.0A Active EP4226650B1 (de) 2020-10-12 2021-10-12 Vorrichtung zur verarbeitung eines signals, audiosystem, lautsprecher, akustischer resonator und damit ausgestattete fahrzeugtür

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US20230388684A1 (en) 2023-11-30
CN116547990A (zh) 2023-08-04
EP4226650A1 (de) 2023-08-16
KR20230085167A (ko) 2023-06-13
EP4226650C0 (de) 2025-08-13
US12526563B2 (en) 2026-01-13
FR3115176A1 (fr) 2022-04-15
FR3115176B1 (fr) 2023-11-24

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