Hearing aid system with one hearing aid and one charging station

Description

[0001] The invention relates to a hearing aid system comprising a hearing aid having a rechargeable battery for power supply, and a charging station configured to charge the hearing aid's battery at least temporarily when the hearing aid is arranged in a charging position relative to the charging station. The invention further provides a method for adjusting at least one parameter relating to signal processing of a hearing aid.

[0002] A hearing aid is typically worn by a wearer to at least partially compensate for a hearing loss. For this purpose, the hearing aid usually contains one or more input transducers, e.g., microphones, which convert ambient sound into corresponding electrical input signals. These signals are then processed according to the hearing loss to be corrected and, among other things, amplified, usually frequency-dependently. The output signal of the signal processing, tailored to the wearer, is then converted via an output transducer, usually in the form of a loudspeaker, into an output sound, which is fed to the wearer's hearing.

[0003] A key task of the hearing aid is, on the one hand, to distinguish useful signal components in the ambient sound - e.g. speech contributions - from background noise in order to improve the intelligibility of the respective useful signal for the wearer, and on the other hand to maintain the most natural hearing impression possible, which is why signal processing should, if possible, not lead to artifacts or distortion. For this purpose, individual listening situations are often defined in the hearing aid as a group of standardized types for the aforementioned variables (within a corresponding parameter range), depending on the type, level, and frequency response of the useful signal and the background noise. For this purpose, various different hearing programs are stored in the hearing aid, which adapt the individual signal processing parameters to the respective standardized listening situation.Through user input, the wearer can also change the hearing program or adjust individual signal processing parameters if the preset assigned to a listening situation does not lead to a satisfactory result for him.

[0004] To minimize the interventions the wearer has to make to the signal processing parameters via user input over the lifetime of a hearing aid, learning algorithms can be used that systematize individual changes made by the wearer to the presets of the signal processing parameters assigned to a listening situation or generally determined acoustic measurements. From this, a prediction for future listening situations can be made depending on the listening situation and the change made. However, even without user input, a pattern for the occurrence of feedback can be recognized, for example, for the control of amplification factors, and this pattern can be incorporated into future signal processing.

[0005] Such learning algorithms require the largest possible amount of historical data for automatically adjusting the signal processing parameters, particularly for determining a new preset based on the previous history of the signal processing parameters depending on the acoustic conditions. However, this data often cannot be provided sufficiently by the hearing aid due to the extremely limited physical space for data storage.

[0006] EP 2 178 315 A2 describes a hearing system comprising a charging station and a hearing aid with a rechargeable battery for powering the hearing aid and a volatile data memory. During normal operation, basic data for configuring the hearing aid is stored in the volatile data memory. The charging station is suitable for accommodating the hearing aid and charging the battery, wherein the charging station further comprises a data memory in which the basic data for configuring the hearing aid can be stored. Via a communication connection between the charging station and the hearing aid, the basic data for configuring the hearing aid can be transferred from the data memory of the charging station to the volatile data memory of the hearing aid when the hearing aid is arranged in the charging station.

[0007] WO 2010 / 081915 A2 describes a device for programming a hearing aid, which is also configured to charge the hearing aid's energy storage device. Programming allows values ​​to be directly set for individual parameters of the hearing aid that directly influence signal processing (e.g., frequency band-specific output levels, compression ratios, etc.).

[0008] WO 2006 / 126881 A2 describes a hearing aid designed to be connectable to a pair of glasses. By partially inserting the glasses frame into a charging device, a battery of the hearing aid can be charged. During the charging process, the charging voltage can be modulated in such a way that information, e.g., regarding a reset to the default setting, can be transmitted to the hearing aid.

[0009] US 2007 / 0 104 343 A1 discloses a charging station for a hearing aid which has additional means for unidirectional or bidirectional data transmission to the hearing aid.

[0010] The invention is therefore based on the object of storing large amounts of operating data for a hearing aid in the simplest and most comprehensively compatible manner possible. The invention is further based on the object of specifying a method for adjusting the signal processing parameters of a hearing aid, which should be able to access the most comprehensive operating data possible.

[0011] The first-mentioned object is achieved according to the invention by a hearing aid system according to claim 1. Advantageous and partly inventive embodiments are the subject of the subclaims and the following description.

[0012] The rechargeable battery is arranged in a housing of the hearing aid, particularly during operation of the hearing aid, and is preferably charged via a corresponding connection for energy transfer to the hearing aid, without the battery having to be removed from the housing. The term "rechargeable battery" is understood to mean, in particular, a battery which is designed to absorb and store electrical energy supplied in a suitable manner and to deliver the stored energy to the load when an electrical load is applied in a circuit comprising the battery, wherein, in particular, a plurality of charging processes are possible until a maximum energy capacity of the battery is reached, followed by a respective complete or partial discharge.

[0013] Preferably, the hearing aid and the charging station for charging the battery are configured accordingly to establish a connection for transmitting energy from the charging station to the hearing aid when the hearing aid is arranged in the charging position, and also configured accordingly to establish a data connection for transmitting the operating data from the hearing aid to the charging station when the hearing aid is arranged in the transmission position.

[0014] In particular, the hearing aid is arranged in a charging position with respect to the charging station by being connected to a charging plug of the charging station, or for wireless charging by being inserted into a corresponding charging slot or placed on a charging plate. The transmission position can in particular be identical to the charging position, and preferably the energy transmission from the charging station to the hearing aid for charging the battery takes place in the same way as the transmission of the operating data from the hearing aid to the charging station, i.e. e.g. via galvanic contacts, a shared charging and data cable, or via a charging cable and a separate data cable, or via a wireless data connection with a corresponding transmission protocol (such as NFC or Bluetooth) and an inductive energy transmission for wireless charging (e.g. Qi Charging).In addition to conventional energy sources such as a power outlet, the energy can also be provided by a mobile energy source such as a power bank, a smartphone, a laptop or an energy converter such as a solar cell module.

[0015] In particular, the charging position is determined by the spatial arrangement of the hearing aid relative to the charging station, as well as by a connection for power transmission, or – in the case of wireless power transmission – by the spatial arrangement of the hearing aid such that power transmission is enabled. Similarly, the transmission position is determined in particular by the spatial arrangement of the hearing aid relative to the charging station, as well as by a connection for data transmission, or – in the case of wireless data transmission – by the spatial arrangement of the hearing aid such that data transmission is enabled.

[0016] The second data storage device is, in particular, physically integrated into the charging station, i.e., in addition to the components required for charging the hearing aid's battery (i.e., in particular, components for voltage conditioning and energy transmission to a hearing aid arranged in the charging position), the second data storage device is also an integral part of the charging station. The charging station preferably has a housing that encloses all of the aforementioned electronic components—possibly with the exception of a power adapter and / or cable for connection to a power grid.

[0017] The term "at least temporary charging" refers in particular to a charging process in which, for the purpose of the best possible energy transfer and / or the longest possible battery life, the battery is not charged strictly continuously, but rather, if necessary, short pauses in the process of feeding energy into the battery can occur, whereby, averaged over the entire period that the hearing aid is arranged in the charging position with respect to the charging station, the energy stored in the battery increases as a result of the charging. In particular, the hearing aid can be arranged in the charging position for several hours, e.g., throughout an entire night, while the energy feed for charging the battery itself is considerably shorter (e.g., on the order of minutes).

[0018] The first data storage device can be configured, in particular, as a non-volatile memory in the hearing aid, and in particular physically implemented in a central non-volatile main memory of the hearing aid, in which an operating system as well as basic functions and acoustic settings of the hearing aid are also stored. Thus, operating data can continue to be stored in the first memory even if the hearing aid is switched off during a break in operation, for example, at night, but is not placed in the charging and transmission position. Alternatively, the first data storage device can be configured as a volatile memory of the hearing aid, for example, as a RAM ("random access memory"), which can also be used for algorithmic operations for signal processing during ongoing operation of the hearing aid.In this case, operating data stored in the first data memory must be transferred to the second data memory of the charging station before the hearing aid is switched off in order to protect the operating data from loss.

[0019] The hearing aid is configured to store, as operating data, in particular, information about a current listening situation, information about the occurrence of acoustic feedback at the hearing aid, acoustic measurement data collected by the hearing aid, a user input, and in particular an input of a user preference regarding signal processing for a current listening situation, an error message, and / or a current value of a parameter relating to the signal processing of the hearing aid. Parameters relating to signal processing include, here and below, in particular a gain factor (if applicable), a directional parameter of a directional microphone (if applicable), a feedback suppression parameter (if applicable), and other parameters that actively control the signal processing of the hearing aid.The operating parameters therefore include in particular the signal processing parameters which directly control a change in an audio signal in the hearing aid, and further parameters which describe the listening situation and / or the acoustic environment, and depending on which the corresponding signal processing parameters are set in the hearing aid.

[0020] When the hearing aid is placed in the charging position for charging, and preferably also in the transmission position, the operating data stored in the first data storage device can be transferred from the hearing aid to the charging station, where it can be stored in the second data storage device, either simultaneously with the charging process or at a later time, i.e., during pauses in energy transmission or similar. This makes it possible to store the operating data in the hearing aid's first data storage device, which is usually only moderately dimensioned due to limited space, in a format that is sufficient or even sufficient for subsequent automated learning processes.advantageous extent, since during each charging process the most current operating data - in particular information on individual listening situations or acoustic scenarios as well as corresponding signal parameter values ​​and associated inputs or setting requests of the hearing aid wearer - can be saved on the second data storage device arranged in the charging station.

[0021] The charging station is further configured to transmit operating data stored in the second data storage to the hearing aid when the hearing aid is arranged in the transmission position. This means that when the hearing aid is arranged in or on the charging station in the transmission position, not only can current operating data stored in the first data storage of the hearing aid be transmitted to the charging station, but conversely, older operating data, in particular, which was transferred to the second data storage during previous charging processes and stored there, can also be transmitted back to the hearing aid for an adjustment and / or processing process. This allows, in particular, the computing resources of the hearing aid to be used for such an adjustment process.

[0022] The hearing aid has a computer unit configured to adapt at least one parameter relating to signal processing of the hearing aid based on the operating data transmitted from the charging station to the hearing aid. The adapted signal processing parameter is preferably subsequently stored in a non-volatile data memory of the hearing aid, which can in particular also be provided by the first data memory if it is configured as a non-volatile data memory. This allows the computing resources of the hearing aid, i.e. in particular a processor unit provided for signal processing, to be used to adapt the at least one signal processing parameter depending on the operating parameters stored in the second data memory.This means that for such an adaptation, the charging station does not need to provide independent computing power in the form of processor power of a corresponding computer and / or processor unit, which has a cost-saving effect on the design of the charging station.

[0023] Automatic adjustment of the individual hearing programs and, in general, the settings of signal processing parameters depending on the acoustic environment can then be carried out based on the operating data stored in the second data storage unit. If the second data storage unit is sufficiently dimensioned, this can provide a long-term user history that is advantageous for this adjustment. This adjustment is preferably carried out using a machine learning algorithm and utilizes the native computing capacity of the hearing aid. The extensive operating data from the second data storage unit is transferred to a hearing aid located in the charging and transfer position, where it is processed on a computer unit for adjustment.Preferably, the available storage capacity of the hearing aid, and in particular the first data memory, is used for the adjustment process like a working memory, which is addressed by the computing capacity of the hearing aid to carry out the adjustment.

[0024] Preferably, the hearing aid is configured to store data from the following list of data types as operating data: Acoustic measurement data collected by the hearing aid, a user input and in particular an input of a user preference with regard to signal processing for a given hearing situation, information on a technical status of the hearing aid, a present value of a parameter relating to signal processing of the hearing aid, temporal information, information regarding an external device located in the vicinity of the hearing aid, an evaluation of collected information.

[0025] This allows for a particularly efficient adjustment process of a signal processing parameter based on operating parameters stored in the second data memory. In particular, at least one value of a signal processing parameter and further information regarding the listening situation and / or ambient sound are stored as operating data, with the storage preferably assigning the at least one signal processing parameter to the said information.

[0026] Information about a technical condition includes, in particular, an error message and / or a test result of a self-check of the hearing aid or individual components or sub-systems and / or log files. A present value of a parameter relating to signal processing of the hearing aid also includes, in particular, a set hearing aid program, a concrete value of an applied, possibly frequency-band-specific amplification, noise suppression or directivity, information on the use of own-voice detection or similar. Acoustic measurement data collected by the hearing aid includes, in particular, information about a current listening situation and / or information about the occurrence of acoustic feedback at the hearing aid. Information regarding a device located in the vicinity of the hearing aid includes, in particular, information about the type of such external device and about any successful coupling with the external device, and, if applicable,to what extent an exchange of information took place between the hearing aid and the external device.

[0027] Temporal information includes, in particular, the length of time the hearing aid was worn and / or a time at which other, likewise stored, information was collected. An evaluation of collected information includes, in particular, listening effort detected based on recorded sensor data or similar, or other data on the wearer's physical condition. Such sensor data includes, in particular, a body temperature value, an ambient temperature, blood pressure, or a pulse rate, and can be collected by the hearing aid itself and / or by an external device such as a body-worn network or a smartwatch, etc., and transmitted to the hearing aid, and stored in addition to the initial operating data.

[0028] The charging station is expediently configured to charge the hearing aid battery by means of a wireless, in particular inductive, energy transfer to the hearing aid. The method is particularly advantageous for wireless energy transfer, since the charging position can be reached by placing the hearing aid on a corresponding charging plate of the charging station or by inserting the hearing aid into a charging slot with a number of charging plates. Particularly in combination with a corresponding wireless data transfer in the transfer position, which is preferably provided by the charging position, this enables a particularly convenient way for the wearer to transfer the operating data to the second data storage device for long-term or permanent backup.In a further advantageous embodiment, the charging station is designed to charge the battery of the hearing aid by means of a galvanic coupling for energy transmission to the hearing aid.

[0029] Advantageously, the hearing aid is configured to transmit operating data stored in the first data memory to the charging station wirelessly, in particular via Bluetooth and / or a comparable data transmission protocol. This eliminates the need for the wearer to connect a separate cable connection to the hearing aid to transmit the operating data from the hearing aid to the charging station, which makes the method more convenient. In a further advantageous embodiment, the hearing aid is configured to transmit operating data stored in the first data memory to the charging station using a galvanic coupling for data transmission.

[0030] It is also advantageous if the charging station is designed to transmit the operating data stored in the second data memory to the hearing aid wirelessly, in particular via Bluetooth and / or a comparable data transmission protocol. In particular, the same connection, i.e. the same wireless transmission protocol such as Bluetooth or similar, can be used as for transmitting the operating data from the first data memory from the hearing aid to the charging station. This keeps the complexity of the system low, as no additional components in the hearing aid or charging station are required for the transmission. However, a variant with different transmission protocols can also be advantageous if the stability of a transmission between the hearing aid and the charging station is not sufficiently high to manage the transmission in both directions with just one connection or transmission protocol.

[0031] The second object is achieved according to the invention by a method according to claim 7.

[0032] This approach allows for advantageous use of the hearing aid's computing resources, so that the charging station does not need to be specially equipped with a corresponding computing unit.

[0033] The hearing aid system according to the invention shares the advantages of the method according to the invention. The advantages mentioned for the hearing aid system and its further developments can thus be applied analogously to the method. Preferably, during the first charging phase, essentially all of the first operating data stored in the first data memory of the hearing aid are transferred to the non-volatile second data memory of the charging station. This allows the first operating data to be deleted from the first data memory, so that it can be used as a working memory for adjusting the at least one signal processing parameter in the hearing aid, which is addressable by the native computing capacity of the hearing aid.

[0034] It proves advantageous if, during a second operating phase of the hearing aid, second operating data are stored in a first data memory of the hearing aid, wherein the at least one signal processing parameter is adapted by a computer unit of the hearing aid based on the second partial data set of first operating data and based on at least one second partial data set of the second operating data. This allows the portions of the first operating data last stored in the hearing aid to be used for the adaptation without having to be transferred to the charging station.

[0035] Advantageously, acoustic measurement data collected by the hearing aid, a user input, information on a technical condition of the hearing aid, a present value of a parameter relating to signal processing of the hearing aid, temporal information, information relating to an external device located in the vicinity of the hearing aid, and / or an evaluation of collected information are stored as the first and preferably as the second operating data.

[0036] An embodiment of the invention is explained in more detail below with reference to the drawings. Herein: Fig. 1 a hearing aid system with a hearing aid and a charging station, which has a data memory for the long-term storage of operating data of the hearing aid.

[0037] Fig. 1 schematically shows a hearing aid system 1 in a partially transparent oblique view, which comprises a hearing aid 2 and a charging station 4. The hearing aid 2 is designed here as a behind-the-ear device (BTE), but other common designs such as ITE, RIC, CIC or similar are also conceivable. The hearing aid has a rechargeable battery 6 for power supply, which is arranged in the housing 8 of the hearing aid 2. Furthermore, the hearing aid 2 has, in a manner not shown in detail, at least two input transducers for generating corresponding input signals from ambient sound and an output transducer for generating an output sound based on an output signal which is generated by a signal processing unit 10 of the hearing aid based on the input signals as a function of a hearing impairment of the wearer to be corrected.During operation of the hearing aid 2, the output sound is introduced into an earpiece 12 in order to be fed through this to the wearer's hearing. In particular, the input transducers can each be provided by a microphone, and the output transducer by a loudspeaker. If the hearing aid 2 is implemented in a design other than the BTE form shown, other forms for the output transducer are also possible, e.g., in the form of a bone conduction earpiece, as well as designs with only one input transducer. The hearing aid further comprises a first data memory 14, in which operating data is continuously stored during operation and which is preferably designed as a non-volatile memory. In particular, the first data memory 14 can be implemented in a non-volatile central memory (not shown) of the hearing aid 2, in which an operating system and other data relevant to the function and operation of the hearing aid are also stored.

[0038] In most cases, user-specific signal processing in the hearing aid to compensate for a wearer's hearing impairment is performed in such a way that the parameters for the signal processing applied to the input signals—e.g., frequency-band-dependent amplification factors and compression ratios, as well as corresponding time constants, angle and directional parameters for generating directional signals, parameters for suppressing background noise or acoustic feedback, etc.—are generated dynamically depending on the input signals. This involves analyzing the input signals with respect to a given listening situation, with a listening situation essentially standardizing real acoustic ambient situations with regard to the type and number of useful signal sources as well as the type and intensity of background noise.

[0039] In a similar real-life environmental situation, e.g., a conversation with a conversation partner in a "noisy" environment with partly diffuse, partly tonal, and directed background noise, where the noise in one case is street noise and in the other case is the noise in a restaurant, the same listening situation is determined, and the corresponding standardized signal processing parameters are set based on this. Within a hearing program assigned to a specific listening situation, further parameter adjustments can be made depending on the input signals and thus the ambient sound. For example, a compression ratio can be increased or the associated settling time can be reduced if a conversation partner tends to make short, very loud, scream-like utterances, which could potentially result in unpleasantly loud sounds in the output sound of the hearing aid 2 for the wearer.

[0040] In addition, however, the wearer can correct the hearing programs automatically determined based on the acoustic ambient situations, as well as individual parameters of the signal processing, by means of a user input - e.g. via a dedicated remote control for the hearing aid 2, via a corresponding application on a mobile phone or via control elements not shown in detail on the hearing aid 2 itself - or at least confirm them in response to a suggestion from the signal processing.

[0041] As operating data, all acoustic measurement data whose analysis resulted in a specific listening situation can be stored in the first memory 14, as well as the user inputs made by the wearer regarding the selection of a hearing program assigned to the listening situation and regarding the signal processing parameter values ​​preset in the hearing program (e.g., lowering a maximum volume while maintaining the hearing program). Such storage can occur whenever a user input is made, or the absence of a user input can also indicate that the wearer is satisfied with the preset hearing program and its parameters.In order to make this information usable for automatic adjustment, the operating data can be saved at regular intervals and / or with each newly determined listening situation or significant change in the acoustic environment.

[0042] The hearing aid 2 is in a charging position 16 with respect to the charging station 4, which is achieved by positioning the hearing aid 2 in a charging slot 18 of the charging station 4, which can be closed by a cover 19. In this charging position 16, the hearing aid 2 is configured to receive energy via an inductive transmitter 20 of the charging station 4, which is powered by a power source 22 of the charging station 4, in order to thereby discharge the battery 6. For this purpose, the hearing aid 2 can have, in a manner not shown, an inductive receiver for receiving the energy output by the inductive transmitter 20. The power source 22 can generally be any source that is capable of providing a suitable power for charging the battery 6 of the hearing aid 2, thus in particular also a corresponding power transformer that is connected to a power supply (not shown) of the charging station 4, or the like.

[0043] In the illustration according to Fig. 1, the hearing aid 2 is also in a transmission position 24 with respect to the charging station 4, wherein the transmission position 24 in the present case is identical to the charging position 16, and thus consists in the hearing aid 2 being inserted in the charging slot 18. The hearing aid 2 has an antenna 26 which is connected, among other things, to the first data memory 14 and is designed to transmit the operating data stored there during operation of the hearing aid 2 to a corresponding antenna 28 of the charging station, from which they are stored on a non-volatile second data memory 30 of the charging station 4. The transmission can take place, for example, via Bluetooth or similar.

[0044] However, different configurations of the charging position 16 and the transmission position 24 are also conceivable, for example, in the case where the energy transfer for charging the battery 6 and the transmission of the operating data between the hearing aid 2 and the charging station 4 are implemented by a charging cable and a separate transmission cable. In this case, the charging position 16 or the transmission position 24 is provided in particular by a connection of the corresponding cable from the hearing aid 2 to the charging station 4.

[0045] In the charging and transmission position 16 or 24 of the hearing aid 2, on the one hand, the battery 6 can be charged and, on the other hand, either simultaneously or with a time delay and thus at times in which energy transmission via the inductive transmitter 20 is temporarily suspended, the operating data can be transmitted from the first memory 14 of the hearing aid 2 via the antennas 26 and 28 to the second memory 30 of the charging station 4. The operating data transmitted by the hearing aid 2 are stored in the second data memory 30.

[0046] After successful storage in the second data storage device 30, a corresponding confirmation signal can be transmitted from the charging station 4 to the hearing aid 2, for example via the two antennas 26, 28, so that the successful storage of the operating data in the second data storage device 30 can be used by the hearing aid 2 to free up storage space in the first data storage device 14 for storing operating data for a subsequent operating phase. Since the second data storage device 30 is arranged in the charging station 4, it can be significantly larger than the first data storage device 14, which is subject to the spatial limitations of the hearing aid 2. Thus, a long-term history of operating data can be stored on the second data storage device 30, which can be used to adapt the signal processing of the hearing aid 2.

[0047] For this purpose, the extensive operating data stored in the second data memory 30 can be transmitted via the antennas 28 and 26 from the charging station 4 to the hearing aid 2 while the latter is arranged in the transmission position 24. This transmission can preferably take place before or after the transmission of the operating data stored in the first memory of the hearing aid 2 to the charging station 4. Simultaneous transmission using a corresponding bidirectional transmission protocol is also conceivable.

[0048] The operating data from the second data storage device 30, which has now been transferred to the hearing aid 2, can be used there on a computer unit 32, on which the signal processing unit 10 is preferably also physically implemented, to adjust individual signal processing parameters. Parameters that can be adjusted include, for example, frequency-band-dependent amplification or compression or the like, and in particular, an assignment to a determined hearing situation or to other acoustic measurement data that can be derived from the input signals and based on which signal processing in the hearing aid 2 typically takes place. The adjusted parameters are then stored in a non-volatile memory of the hearing aid 2, so that the adjusted parameters are used for signal processing in an operating phase following this adjustment.The said non-volatile memory can be physically implemented in particular on the same memory on which the first data memory 14 is implemented.

[0049] An alternative adaptation to the invention, in which parts of the adaptation are performed on a dedicated computer unit (not shown) of the charging station 4, in order to subsequently transmit the adjusted parameters to the hearing aid 2, is also conceivable. Performing the calculation steps required for the adaptation on the computer unit 32 of the hearing aid 2 has the advantage that a separate computer unit is not required in the charging station 4. However, additional computing capacity on the charging station 4 can accelerate the adaptation.

[0050] Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited to this embodiment. Other variations may be devised by those skilled in the art without departing from the scope of the invention. List of reference symbols

[0051] 1 Hearing aid system 2 Hearing aid 4 Charging station 6 Battery 8 Housing (of the hearing aid) 10 Signal processing unit 12 Earpiece 14 First data storage 16 Charging position 18 Charging slot 19 Cover 20 Inductive transmitter 22 Power source 24 Transmission position 26 Antenna (of the hearing aid) 28 Antenna (of the charging station) 30 Second data storage 32 Computer unit

Claims

1. Hearing aid system (1), comprising - a hearing aid (2), which has a rechargeable battery (6) for the power supply and a first data memory (14) for storing operating data, and - a charging station (14), which has a nonvolatile second data memory (30), wherein the charging station (4) is configured to at least temporarily charge the battery (6) of the hearing aid (2) when the hearing aid (82) is arranged in a charging position (16) with respect to the charging station (4), wherein the hearing aid (2) is configured to store operating data continuously during operation in the first data memory (14) for subsequent automated learning processes, and is configured to transfer operating data stored in the first data memory (14) to the charging station (4) when the hearing aid (2) is arranged in a transfer position (24) with respect to the charging station (4), wherein the hearing aid (2) is configured to store as operating data information with respect to an existing hearing situation and / or acoustic measurement data collected by the hearing aid and / or a user input of the user preference with respect to the signal processing function for an existing hearing situation and / or an existing value of a parameter relating to the signal processing function of the hearing aid, wherein the charging station (4) is configured to store operating data transferred from the hearing aid (2) in the second data memory (30), characterized in that the second data memory (30) is dimensioned larger than the first data memory (14), the charging station (4) is furthermore configured to transfer older operating data stored in the second data memory (30), which were transferred during preceding charging processes to the second data memory (30) and stored therein as part of a long-term history of operating data, back to the hearing aid (2) when the hearing aid (2) is arranged in the transfer position (30), and the hearing aid (2) furthermore has a computer unit (32), which is configured to adapt at least one parameter relating to a signal processing function of the hearing aid (2) by means of a machine learning algorithm on the basis of the older operating data transferred from the charging station (4) to the hearing aid (2).

2. Hearing aid system (1) according to Claim 1, wherein the charging station (4) is configured to charge the battery (6) of the hearing aid by means of a wireless energy transfer to the hearing aid (2).

3. Hearing aid system (1) according to Claim 1, wherein the charging station (4) is configured to charge the battery (6) of the hearing aid by means of a galvanic coupling for the energy transfer to the hearing aid (2).

4. Hearing aid system (1) according to any one of the preceding claims, wherein the hearing aid (2) is configured to transfer operating data stored in the first data memory (14) wirelessly to the charging station (4).

5. Hearing aid system (1) according to any one of the preceding claims, wherein the charging station (4) is configured to transfer the operating data stored in the second data memory (30) wirelessly to the hearing aid (2).

6. Hearing aid system (1) according to any one of Claims 1 to 3, wherein the hearing aid (2) is configured to transfer operating data stored in the first data memory (14) to the charging station (4) by means of a galvanic coupling for the data transfer.

7. Method for adapting at least one parameter relating to a signal processing function of a hearing aid (2), wherein during a first operating phase of the hearing aid (2), first operating data are continuously stored in a first data memory (14) of the hearing aid (2), wherein information on an existing hearing situation and / or acoustic measurement data collected by the hearing aid and / or a user input of the user preference with respect to the signal processing for an existing hearing situation and / or an existing value of a parameter relating to the signal processing function of the hearing aid or stored as operating data, wherein during a first charging phase of the hearing aid (2), a rechargeable battery (6) in the hearing aid (2) is at least temporarily charged by a charging station (4), wherein during the first charging phase (4), at least a first personal data set of the first operating data stored in the first data memory (14) of the hearing aid (2) is transferred to a nonvolatile second data memory (30) of the charging station (4), which is dimensioned larger than the first data memory (14) of the hearing aid, so that the first personal data set is stored there as part of a long-term history of operating data, wherein during a second charging phase of the hearing aid (2), the rechargeable battery (6) in the hearing aid (2) is at least temporarily charged by the charging station (4), and at least one second partial data set of the first operating data is transferred to the hearing aid (2) from the second data memory (30), wherein the at least one parameter of the signal processing function is adapted by means of a machine learning algorithm by a computer unit (32) of the hearing aid (2) on the basis of the second partial data set of first operating data.

8. Method according to Claim 7, wherein during the first charging phase (4), essentially all first operating data stored in the first data memory (14) of the hearing aid (2) are transferred to the nonvolatile second data memory (30) of the charging station (4).

9. Method according to Claim 7 or Claim 8, wherein during a second operating phase of the hearing aid (2), second operating data are stored in a first data memory (14) of the hearing aid (2), and wherein the at least one parameter of the signal processing function is adapted by the computer unit (32) of the hearing aid (2) on the basis of the second partial data set of first operating data and on the basis of at least one second partial data set of the second operating data.