Method for operating an electromechanical massage device of a seat

Abstract

Method (60) for operating an electromechanical massage device (6) of a seat (4), in particular of a motor vehicle (2), comprising a massage drive (14) with an electric motor (16), wherein - an audio signal (64) is provided, - a temporal derivative (68) of the audio signal (64) is created, - a control signal (72) for the electric motor (16) is created based on the time derivative (64), and - the electric motor (16) is supplied with the control signal (72).

Description

[0001] The invention relates to a method for operating an electric motor massage device for a seat and to an electric motor massage device for a seat. The seat is preferably a component of a motor vehicle. The invention further relates to a seat of a motor vehicle.

[0002] Motor vehicles include a number of auxiliary components that do not directly contribute to propulsion. These auxiliary components primarily enhance the comfort of the vehicle's occupants. One such component is an electric massage device integrated into a vehicle seat. When activated, this device periodically adjusts a specific area of ​​the seat, such as the backrest or a portion thereof. This stimulates blood circulation, making the vehicle more comfortable to drive. Furthermore, this feature allows for longer journeys without causing occupant fatigue.

[0003] Typically, the interval at which the vehicle seat's adjustment range is set at the factory, or it is possible to select pre-set increments, each corresponding to a specific periodicity. Thus, the user knows at what intervals the seat's adjustment range will occur and can therefore anticipate when the next adjustment will take place. Consequently, the user may find the massage function monotonous after a certain period of use, thus reducing comfort. Therefore, DE 10 2015 217 171 A1 proposes adjusting the seat's adjustment range based on an acoustic entertainment signal. Due to a comparatively large number of acoustic entertainment signals, the user does not become accustomed to the pattern by which the seat's adjustment ranges are determined.The user experience is also improved when the acoustic entertainment signal is played in addition.

[0004] US Patent 6,027,463 A discloses a music massage system comprising input or bandpass discriminators, post-processors with fixed or variable threshold detection, music beat pattern detectors, and beat enhancers for controlling vibrators. The post-processor includes various syntheses of massage patterns, beat rhythm, and dynamic non-linear signal operators.

[0005] From WO 2006 / 048 723 A1, a vibration massage device is known with an ergonomically shaped resonance structure that is in contact with a sound transducer capable of transmitting a variety of vibrations and propagating sound waves generated by an audio signal generator after suitable amplification. The resonance structure essentially consists of a central, for example curved, support and a variety of rods or boards arranged transversely to it.

[0006] DE 10 2014 216 161 A1 discloses a motor vehicle seat comprising at least one vibration element designed as a structure-borne sound generator. The device consists of several vibration elements, each designed as a structure-borne sound generator, arranged in a predefinable matrix within a seat section and / or backrest section of the seat.

[0007] The invention is based on the objective of providing both a particularly suitable method for operating an electromechanical massage device of a seat and a particularly suitable electromechanical massage device of a seat as well as a particularly suitable seat of a motor vehicle, wherein comfort is increased in particular.

[0008] With regard to the method, this problem is solved according to the invention by the features of claim 1, with regard to the electromechanical massage device by the features of claim 6, and with regard to the seat by the features of claim 10. Advantageous further developments and embodiments are the subject of the respective dependent claims.

[0009] The method serves to operate an electric massage device. The electric massage device is a component of a seat, and its intended purpose is to perform a massage function. This involves, for example, moving a component of the seat, such as a seat cushion or a backrest. The seat, and thus the electric massage device, is preferably a component of a motor vehicle, and the seat is, for example, a driver's seat or a passenger's seat.

[0010] The electromechanical massage device comprises a massage drive with an electric motor. This electric motor drives, in particular, another component of the massage drive, which performs the massage function. For example, this other component, such as a vibration element, an unbalanced element, or a piston, is used to pop or vibrate a part of the seat. This other component is suitable, expediently provided, and configured for this purpose. The electric motor is, for example, a brushed commutator motor. However, it is particularly preferred that the electric motor be brushless, and in particular a brushless direct current (BLDC) motor. For example, the electric motor is an asynchronous motor, but preferably a synchronous motor. The electric motor is, in particular, three-phase, with the individual phases connected, for example, in a delta or star configuration.

[0011] The process involves providing an audio signal in a first step. This audio signal is provided, for example, by an audio system and corresponds in particular to the soundtrack of a film or a purely acoustic signal. Specifically, the audio signal is a piece of music stored, for example, on a data carrier such as a CD, DVD, USB stick, or other electronic storage medium. The audio signal is received, for example, by a radio receiver. The audio signal exists primarily in the time domain. In other words, the audio signal is variable over time.

[0012] In a further step, the time derivative of the audio signal is calculated. This determines how the audio signal changes over time. Specifically, the audio signal is divided into time segments, and the change in the audio signal between successive time segments is determined. In other words, the time derivative is calculated at discrete points in time. Alternatively, the change can be determined more or less continuously. Based on the time derivative, a control signal for the electric motor is then generated. In other words, the control signal is based on the time derivative, and there is a functional relationship between the time derivative and the control signal.

[0013] In a further step, the electric motor is supplied with the control signal. Thus, the electric motor is not operated by the audio signal itself, but rather by the control signal passing through it on its time derivative. Therefore, the operation of the electric motor depends on the dynamics of the audio signal and not, for example, on its volume. For instance, at a largely constant volume, the electric motor operates relatively weakly, whereas with a relatively quiet audio signal but a relatively abrupt change in volume, the electric motor operates more strongly. Consequently, the tactile perception for the user is altered, and additional operating modes for the massage drive become available. As a result, user comfort is further enhanced.

[0014] For example, the audio signal is a digital audio signal. In other words, the audio signal exists as a digital word. Here, a digital word is also created as the time derivative, so that the time derivative also has discrete values ​​and / or a specific sampling rate. However, it is particularly preferred that an analog audio signal is used. If, for example, a piece of music exists as a digital music file, it is converted into an analog signal using a D / A converter. For example, to create the time derivative, the analog audio signal is sampled at discrete points in time, and the change in the audio signal between two adjacent discrete sampling points is determined. The resulting signal is then used, for example, as the time derivative. However, it is particularly preferred that the time derivative is also an analog signal.In other words, the analog time derivative is created from the analog audio signal. This is possible using relatively simple technical means, which reduces processing time and the potential for errors.

[0015] Advantageously, the control signal is generated such that the resulting torque of the electric motor corresponds to its time derivative. The time derivative acts as a high-pass filter, so that the electric motor's torque exhibits only fluctuations with comparatively low frequencies. This further increases user comfort and reduces the formation of undesirable harmonics. For example, the time derivative is used as the electric current applied to the electric motor. In other words, the control signal corresponds to the electric current flowing through the electric motor. Alternatively, or in combination, the time derivative corresponds to the electrical voltage applied to the electric motor. However, it is particularly preferred that the time derivative be amplified to generate the control signal and used as the electrical voltage or...used as electric current, by means of which the electric motor is powered.

[0016] Alternatively, control signals for any semiconductor switches in a converter can be generated based on the time derivative. The converter's semiconductor switches are then controlled according to these signals, so that the electric motor, which is typically brushless, is driven by the electrical current and / or voltage generated by the converter. The control signals are generated such that the resulting torque of the electric motor corresponds to the time derivative. Specifically, the torque is equal to or at least proportional to the time derivative. Because of this correlation, the massage drive is driven at a comparatively low speed, especially when playing music with a largely constant volume, resulting in relatively little movement of the seat's position.However, if the audio signal has a relatively high dynamic range, a relatively strong adjustment of at least one area of ​​the seat occurs, preferably independent of the actual volume of the audio signal. Consequently, the user is massaged according to the dynamic range of the audio signal and not according to its level and / or volume, which further increases comfort.

[0017] For example, the electric motor is controlled. In other words, the electric motor is supplied with the control signal. However, the actual response of the electric motor to the control signal is not verified. As a result, the operation of the massage drive is simplified, and manufacturing costs are comparatively low. A particularly preferred method, however, is to regulate the electric motor. In other words, it is checked whether the movement of the electric motor corresponds to the control signal. If, for example, there is a deviation, the current to the electric motor is adjusted. Therefore, user comfort is further increased.

[0018] A sound transducer is suitably supplied with the audio signal. The sound transducer is, for example, a structure-borne sound generator. However, it is particularly preferred that the sound transducer be a loudspeaker, i.e., an electromechanical transducer. Thus, the audio signal is also presented audibly to the user, which further increases comfort. Preferably, the audio signal is first amplified by means of an amplifier, especially if it is a digital audio signal. A conversion to the analog domain is suitably performed. In particular, the audio signal is output with a delay by means of the sound transducer, and the amplifier, if present, acts, for example, as a delay element. Advantageously, the delay is such that the response of the electric motor to the time derivative is essentially synchronous with the output of the audio signal by means of the sound transducer.In particular, the time delay compensates for the time required to generate the time derivative and the control signal. For example, any inertia of the electric motor is also taken into account. The delay is suitably implemented such that the resulting torque of the electric motor essentially corresponds to the time derivative of the sound emitted by the transducer. Consequently, comfort is further enhanced.

[0019] The electric massage device is a component of a seat and, for example, a component of a motor vehicle. Specifically, the electric massage device is a component of a driver's seat or a passenger's seat. The electric massage device has a massage drive with an electric motor. The electric massage device serves to provide a massage function. Advantageously, the massage drive is designed and configured to adjust a section of the seat, for example, a backrest, a seat cushion, or at least a part thereof. For example, the section is compressed.

[0020] The electromechanical massage device also features an audio input, which may be a jack plug, for example. Alternatively, the audio input may be a serial connector or another type of connector. Another alternative is the audio input being provided by a cable. The audio input is primarily analog and is connected to a differentiator. The differentiator is connected to the massage drive via the signal path. Thus, the audio input is connected to the massage drive via the differentiator. Consequently, during operation, the time derivative of an audio signal present at the audio input is applied to the massage drive. Specifically, the audio input is electrically connected to the massage drive via the differentiator.Thus, during operation, an electrical signal present at the audio input is routed via the differentiator to the massage drive.

[0021] The electromechanical massage device is operated, in particular, according to a method in which an audio signal is provided and a time derivative of the audio signal is created. Based on the time derivative, a control signal for the electric motor is generated, and the electric motor is energized with the control signal. The audio signal is provided, in particular, at the audio input. The electromechanical massage device is, for example, suitable, preferably designed and configured, to carry out the method. For example, the electromechanical massage device is used to carry out the method. Advantageously, when the electric motor is operated, the section, or at least a portion of the section, is moved by means of the electric motor. The electromechanical massage device suitably includes a control device, which, for example, comprises the differentiator.In particular, the control unit is suitable, preferably designed and configured, to carry out the procedure. The control unit is, for example, a central control unit (control device) of the electromechanical massage system or a component of the massage drive. For example, the control unit also serves to adjust the current flow to the electric motor. Preferably, when operating via the control unit, communication takes place with other components, for example, an input device and / or a bus system, especially if the electromechanical massage system is a component of the motor vehicle.

[0022] The massage drive, for example, has an imbalance driven by the electric motor. This imbalance is used to set the massage drive in motion. When installed, the massage drive is advantageously coupled to another component of the seat, such as a backrest or seat cushion, so that the imbalance causes the respective component to move, and in particular, to flex.

[0023] Due to the differentiator, the massage drive is driven by the time derivative of any audio signal present at the audio input, so that the electric motor is essentially operated based on the time derivative of the audio signal. Thus, the movement of at least one component of the seat depends on the dynamics of the audio signal and not on the audio signal itself, which increases comfort.

[0024] In particular, the electromechanical massage device has a number of massage drives, each of which is connected to the audio input via a signal. Each massage drive is connected to the audio input via a differentiator, for example, either by the same differentiator or by its own dedicated differentiator, so that the electromechanical massage device has as many differentiators as massage drives. The massage drives are, for example, identical in construction. Specifically, the electromechanical massage device has between two and twenty such massage drives, or between four and sixteen such massage drives.

[0025] For example, the differentiator is directly electrically connected to the electric motor. However, a suitable amplifier is located between the differentiator and the electric motor, so that the time derivative is amplified by the amplifier. This makes it possible to generate a comparatively high torque using the electric motor, which corresponds in particular to the time derivative. The electric motor is suitably designed with brushes, so that the time derivative of the audio signal provided by the differentiator is directly converted into torque for the electric motor.

[0026] The differentiator is connected, in particular, to a control unit of the massage drive. Specifically, the differentiator is directly connected to the control unit, so that no further changes occur to the time derivative provided by the differentiator during operation. The control unit expediently includes current and / or voltage regulation, in particular a converter. The control unit includes, for example, an amplifier, so that the time derivative provided by the differentiator is amplified by the control unit. In particular, the electric motor is designed with brushes, and the time derivative amplified by the control unit is used as a control signal, in particular as an electric current or as an electric voltage applied to the electric motor.

[0027] Preferably, however, the electric motor is brushless and the control unit preferably includes the inverter. The electric motor has, in particular, three phases, which are preferably connected in a delta or star configuration. The inverter includes, for example, a bridge circuit, in particular a B6 circuit. Each bridge arm has, in particular, two semiconductor switches. The semiconductor switches are, in particular, field-effect transistors (FETs), preferably MOSFETs. Based on the time derivative provided by the differentiator, control signals are generated, in particular, for the semiconductor switches, so that a control signal, in particular an electrical voltage or an electrical current, is generated by the inverter, which is used to drive the electric motor.Advantageously, the control signals for the semiconductor switches are designed such that the resulting torque of the electric motor corresponds to the time derivative created by means of the differentiator.

[0028] For example, the electromechanical massage device includes a microcontroller and / or processor that incorporates the differentiator. The differentiator is preferably implemented via a software routine. Alternatively, however, the differentiator is discrete and includes, for example, an operational amplifier. Furthermore, the differentiator comprises a resistor and a capacitor, the capacitor being connected to an input of the operational amplifier. This input is connected to the output of the operational amplifier via the resistor. Consequently, the differentiator is implemented with a comparatively simple circuit, which increases robustness. Moreover, it is possible to generate an essentially analog time derivative, thus avoiding the introduction of artifacts into the time derivative generated by the differentiator.

[0029] Preferably, the electromechanical massage device includes a sound transducer, which is in particular an electromechanical transducer, especially a loudspeaker. The sound transducer is connected to the audio input, for example, directly. Preferably, however, the sound transducer is connected to the audio input via an amplifier. A suitable electrical connection is made between the sound transducer and the audio input. In other words, the sound transducer is operated by means of the electrical signal that is provided at the audio input during operation. If the audio signal present at the audio input is a digital audio signal, the amplifier is in particular a digital amplifier and / or includes a D / A converter. Due to the sound transducer, the audio signal present at the audio input is reproduced audibly for a user during operation, which increases comfort.

[0030] The seat is a component of a motor vehicle and, for example, a passenger or driver's seat. The seat has a massage drive with an electric motor and an audio input. The audio input is connected to the massage drive via a differentiator. The electric massage device is preferably operated according to a method in which an audio signal is provided, particularly at the audio input. In a further step, the time derivative of the audio signal is generated, particularly using the differentiator. Based on this time derivative, a control signal for the electric motor is generated, preferably by means of a control unit for the massage drive. In a further step, the electric motor is energized with the control signal, so that, in particular, a massage function of the electric massage device is performed according to the time derivative of the audio signal.

[0031] The further training and advantages explained in connection with the procedure for operating the electromechanical massage device can also be applied analogously to the electromechanical massage device / use and / or the seat, and vice versa.

[0032] Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. The drawing shows: Fig. 1 schematically simplified, a motor vehicle with a seat comprising an electric motor massage device, Fig. 2 schematically a first embodiment of the electromechanical massage device, Fig. 3 a method for operating the electromechanical massage device, and Fig. 4 according to Fig. 2 a second embodiment of the electromechanical massage device.

[0033] Corresponding parts are marked with the same reference symbols in all figures.

[0034] In Fig. Figure 1 schematically simplifies a motor vehicle 2 with a (vehicle) seat 4. The vehicle seat 4 includes an electric massage unit 6, which is connected to a BUS system 8. The BUS system 8 is based on the CAN standard, and an on-board computer 10 and another BUS participant 12 are each components of the BUS system 8. The on-board computer 10 transmits requests to the electric massage unit 6 and the other BUS participant 12. Operating data is also exchanged via the BUS system 8.

[0035] In Fig. Figure 2 shows a schematic section of the electromechanical massage device 6. The electromechanical massage device 6 comprises a massage drive 14 with an electric motor 16. The electric motor 16 is brushless and has three phases connected in a star or delta configuration. An unbalanced weight 20 is fixedly connected to a shaft 18 of the electric motor 16 and is thus driven by the electric motor 16. The massage drive 14 also includes a control unit 22 with a converter 24, which is electrically powered by an on-board electrical system (not shown). The on-board electrical system of the vehicle 2 provides a DC voltage of 12 V, 24 V, or 48 V.

[0036] The inverter 24 has a bridge circuit 26 in the form of a B6 circuit. The bridge circuit 26 thus has a total of three bridge arms, each of which comprises two semiconductor switches 28, each in the form of a MOSFET. Each of the bridge arms of the bridge circuit 26 is assigned one of the phases of the electric motor 16 and electrically connected to it. The control unit 22 also has a control circuit 30, by means of which control signals are generated for the semiconductor switches 28. Depending on the control signals, the semiconductor switches 28 are switched to the electrically conductive or the electrically non-conductive state.

[0037] The control circuit 30 is connected via a differentiator 32 to a first output 34 of a switch 36. The differentiator 32 has an operational amplifier 38 with a non-inverting input 40, which is connected to ground 42, provided by the body of the vehicle 2 (not shown). Furthermore, the operational amplifier 38 has an inverting input 44, which is connected via a capacitor 46 to the first output 34 of the switch 36. The first output 34 of the switch 36 is also electrically connected via the capacitor 46 and a resistor 47 to an output 48 of the operational amplifier 38, which in turn is electrically connected to the control circuit 30. In another alternative, the differentiator 32 is implemented using software functions.

[0038] The switch 36 has a second output 50 and an input 52, whereby a signal present at input 52 is routed by the switch 36 to both the first output 34 and the second output 50. In other words, the signal present at input 52 is duplicated by the switch 36. The input 52 of the switch 36 is electrically connected to an audio input 54. Thus, the audio input 54 is electrically and signal-wise connected to the massage drive 14 via the differentiator 32. The second output 50 of the switch 36 is connected to an amplifier 56, which is connected to a transducer 58 in the form of a loudspeaker. Thus, the transducer 58 is signal-wise and electrically connected to the audio input 54 via the amplifier 56 and the switch 36.

[0039] In Fig. Figure 3 shows a method 60 for operating the electromechanical massage device 6. In a first step 62, an audio signal 64 is provided via the audio input 54. The audio signal 64 is provided by an audio system (not shown in detail), such as a radio or a playback device for acoustic entertainment signals, such as music tracks stored, for example, on a CD / DVD or a USB stick. The audio signal 64 is fed into the bus system 8 via the audio system and routed to the audio input 54. The audio signal 64 is an analog audio signal. In a subsequent second step 66, the audio signal 64 is routed via the switch 36 to the differentiator 32, which generates a time derivative 68 of the audio signal 64. The time derivative 68 is then forwarded to the control circuit 30 of the control unit 22.

[0040] In a subsequent third step 70, control signals for the semiconductor switches 28 are generated by the control circuit 30 based on the time derivative 68. The semiconductor switches 28 are then controlled according to these signals, resulting in a control signal 72 at the output of the inverter 24, which is connected to the electric motor 16. Each of the three phases of the inverter 24 is assigned a component of the control signal 72. In a subsequent fourth step 74, the electric motor 16 is energized with the control signal 72, causing it and the associated imbalance 20 to rotate. The electric motor 16 is operated in a controlled manner. In other words, the control circuit 30 monitors the speed of the electric motor 16 and the resulting torque 76, and adjusts the current supplied to the electric motor 16 if there is a deviation from the desired parameters.In the third step 70, the control signal 72 was generated by the control circuit 30 such that a resulting torque 76 of the electric motor 16 corresponds to the time derivative 68. The curve of the resulting torque 76 thus corresponds to the curve of the time derivative 68.

[0041] In a fifth step 78, which occurs simultaneously with the fourth step 74, the transducer 58 is supplied with the audio signal 80, amplified by the amplifier 56. An additional delay is applied by the amplifier 56 so that the sound waves emitted by the transducer 58 correspond to the torque 76. Thus, the curve of the resulting torque 76 corresponds to the time derivative of the sound waves emitted by the transducer 58. Consequently, the seat 4 moves synchronously with the sound wave output, thereby increasing comfort for the user of the motor vehicle 2.

[0042] In Fig.Figure 4 shows a modification of the electromechanical massage device 6, wherein the audio input 54, the crossover 36, the amplifier 56, the transducer 58, and the differentiator 32, as well as their function and circuitry, remain unchanged. Only the massage drive 14 is modified, and the electric motor 16 is designed as a brushless motor, which still includes the shaft 18 and the imbalance 20 non-rotatably connected to it. Furthermore, the massage drive 14 includes the control unit 22, which comprises an amplifier not shown in detail.

[0043] The control unit 22 is connected to the audio input 54 via the differentiator 32 and the switch 36, both signal-wise and electrically, so that the control unit 22 is supplied with the time derivative 68 during operation. This is amplified by the control unit 22, so that the electric motor 16 is supplied with a current signal 82. The waveform of the current signal 82 corresponds to the waveform of the time derivative 68 and is applied to the electric motor 16, so that the resulting torque 76 of the electric motor 16 corresponds to the time derivative 68. During operation of this electromechanical massage device 6, the fourth and fifth work steps 74 and 78 are also carried out, so that even with this configuration of the electromechanical massage device 6, user comfort is increased.

[0044] In summary, it is not the audio signal 64 itself, but rather its temporal derivative 68 that is fed into the massage drive 64, so that the seat 4 vibrates not according to the audio signal 64, but according to the temporal derivative 68, which improves the dynamics of the electromechanical massage device 6 and thus the user's perception. Furthermore, this corresponds to high-pass filtering.

[0045] For example, in addition to the time derivative 68, the control unit 22 is supplied with another signal, which is, for example, periodic. Thus, there is, in particular, an operating mode in which the vibration occurs according to the audio signal 64 and according to a periodic vibration, which are therefore used in parallel (simultaneously). In other words, different modes for operating the massage drive 14 are superimposed. Here, for example, the individual parameters can be entered via an input device, which is, in particular, connected to the bus system 8. The input device is, for example, a so-called "human-machine interface". Alternatively, or in combination with this, individual parameters are provided, for example, by means of a portable device, such as a smartphone. For example, the additional participant 12 is a receiver for wireless communication with the portable device.In particular, the individual parameters will be stored in a person-specific manner. For person identification, for example, a key, a smartphone, or biometric data obtained via the electromechanical massage unit 6, such as weight, weight distribution, or seat setting, will be used. It is also possible to identify a user's behavior pattern for this purpose, such as the sequence and nature of operating procedures, especially getting in, fastening the seatbelt, and starting the engine.

[0046] The invention is not limited to the embodiments described above. Rather, other variants of the invention can also be derived by a person skilled in the art without departing from the subject matter of the invention. In particular, all individual features described in connection with the individual embodiments can also be combined with one another in other ways without departing from the subject matter of the invention. Reference symbol list 2 motor vehicles 4 vehicle seats 6 electromechanical massage devices 8 BUS system 10 On-board computers 12 other bus participants 14 massage drive 16 Electric motor 18 wave 20 Imbalance 22 Control unit 24 inverters 26 Bridge circuit 28 semiconductor switches 30 Control circuit 32 Differentiators 34 first exit 36 switches 38 operational amplifiers 40 non-inverting input 42 Masse 44 inverting input 46 Capacitor 47 Resistance 48 Exit 50 second exit 52 Entrance 54 Audio input 56 amplifiers 58 transducers 60 procedures 62 First step 64 Audio signal 66 second step 68 Time derivative 70 third step 72 Control signal 74 fourth step 76 resulting torque 78 fifth step 80 amplified audio signal 82 Current signal

Claims

[1] Method (60) for operating an electromechanical massage device (6) of a seat (4), in particular of a motor vehicle (2), comprising a massage drive (14) with an electric motor (16), wherein - an audio signal (64) is provided, - a temporal derivative (68) of the audio signal (64) is created, - a control signal (72) for the electric motor (16) is created based on the time derivative (64), and - the electric motor (16) is supplied with the control signal (72). [2] Method (60) according to claim 1, characterized by , that an analog audio signal (64) is provided. [3] Method (60) according to claim 1 or 2, characterized by , that the control signal (72) is created such that a resulting torque (76) of the electric motor (16) corresponds to the time derivative (68). [4] Method (60) according to any one of claims 1 to 3, characterized by, that the electric motor (16) is operated in a controlled manner. [5] Method (60) according to any one of claims 1 to 4, characterized by , that a sound transducer (58) is supplied with the audio signal (64, 80). [6] Electromotive massage device (6) of a seat (4), in particular of a motor vehicle (2), comprising a massage drive (14) with an electric motor (16) and an audio input (54), wherein the audio input (54) is connected to the massage drive (14) by means of a differentiator (32). [7] Electromotive massage device (6) according to claim 6, characterized by , that the differentiator (32) is connected to a control unit (22) of the massage drive (14) which has an inverter (24). [8] Electromotive massage device (6) according to claim 6 or 7, characterized by , that the differentiator (32) has an operational amplifier (38). [9] Electromotive massage device (6) according to any one of claims 6 to 8, characterized by a sound transducer (58) which is connected to the audio input (54) in terms of signaling, in particular by means of an amplifier (56). [10] Seat (4) of a motor vehicle (2), with an electromechanical massage device (6) according to one of claims 6 to 9, which is operated in particular according to a method (60) according to one of claims 1 to 5.

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