Hearing device and method of operating a hearing device

Abstract

This invention discloses a hearing device, which includes a signal processor configured to determine an operating mode of the hearing device, including a first mode and a second mode. The hearing device also includes a first wireless communication unit and a second wireless communication unit, and an electrical antenna for transmitting and receiving electromagnetic radiation, the antenna being configured to resonate at a first frequency. The hearing device further includes an active matching device configured to interconnect the first and second wireless communication units with the antenna, wherein in the first mode, the active matching device is configured to enable the antenna to transmit and receive electromagnetic radiation at the first frequency, and wherein in the second mode, the active matching device is configured to adjust the antenna characteristics of the antenna to enable the antenna to transmit and receive electromagnetic radiation at a second frequency.

Description

Technical Field

[0001] The present invention relates to a hearing device and method thereof, particularly a hearing device with wireless communication capability and thus a hearing device including an antenna for communication.

[0002] The present invention also relates to a hearing device configured to communicate using magnetic induction and / or by using radio frequency. The hearing device can be used in a binaural hearing device system. The hearing device can be a hearing device used to compensate for a user's hearing loss. During operation, the hearing device is worn in or over the user's ear, for example, to alleviate the user's hearing loss. Background Technology

[0003] Hearing devices such as hearing aids may include antennas and wireless communication units for communicating with another hearing device in a binaural hearing device system, and / or for communicating with other electronic devices such as smartphones.

[0004] However, an improved hearing device is needed to provide communication with other hearing devices or electronic devices. Summary of the Invention

[0005] One object of the present invention is to provide a hearing device with improved wireless communication capabilities (e.g., improved wireless communication capabilities with other hearing devices or electronic devices).

[0006] With an established end-to-end (E2E) link, wireless connections between hearing aids allow for advanced binaural signal processing. Furthermore, hearing aids can connect to a wide range of electronic devices or accessories, which may be worn on the body or placed near the user, thus connecting to the internet as part of the so-called Internet of Things (IoT). Ensuring a stable E2E link is expected. The 2.4 GHz ISM band is preferred due to the existence of numerous harmonized low-power communication standards, such as BLE or ZigBee, which are available globally for industrial applications, and the trade-off between power consumption and achievable range. Therefore, the 2.4 GHz band can be used for hearing aid communication. Currently, the 1.6 GHz ISM band is also used for hearing aids.

[0007] E2E links can meet the design and performance requirements of wearable antennas. To achieve good fit, the antenna may exhibit optimal radiation efficiency, bandwidth, polarization, and radiation pattern, while the available design volume is reduced, as space is often critical for wearable devices (such as all types of hearing aids). Furthermore, the needs of mass production and industrial design may require antennas to be even smaller, lighter, and less expensive to manufacture. Various overall constraints are likely to be relevant. Since body tissue exhibits high losses above 1.5 GHz due to high water content, placing the antenna close to the human head can jeopardize efficiency. This can have a significant impact on overall performance, considering the magnitude of the efficiency drop and the fact that hearing aids may operate at extremely low power. Another issue threatening antenna efficiency is the small available design volume, which necessitates physical proximity, and therefore electrical proximity, to other parts of the device, making coupling with them highly likely. Due to its fundamental limitations, a small electrical antenna also struggles to achieve large bandwidth. The bandwidth can cover at least the entire 2.4 GHz ISM band, for example, 2.45 GHz + / - 2.5% bandwidth, or 2.45 GHz + / - 5% bandwidth and / or around 1.6 GHz bandwidth, for example, 1.6 GHz + / - 2.5% bandwidth, or 1.6 GHz + / - 5% bandwidth, but a larger bandwidth may help compensate for antenna detuning caused by the body, which varies from user to user.

[0008] According to the present invention, the above and other objectives are achieved by a hearing device and method.

[0009] A hearing device including a signal processor is disclosed. The signal processor is configured to determine an operating mode of the hearing device. The hearing device modes include a first mode and a second mode. The hearing device includes a wireless communication unit. The hearing device may include a first wireless communication unit and a second wireless communication unit. The hearing device includes an antenna for transmitting and receiving electromagnetic radiation. The antenna may be an electrical antenna for transmitting and receiving electromagnetic radiation. The antenna is configured to resonate at a first frequency. The hearing device includes an active matching device. The active matching device is configured to interconnect the first and second wireless communication units with the antenna. In the first mode, the active matching device is configured to enable the antenna to transmit and receive electromagnetic radiation at the first frequency. In the second mode, the active matching device may be configured to adjust the antenna characteristics of the antenna so that the antenna can transmit and receive electromagnetic radiation at a second frequency.

[0010] The advantage of the disclosed hearing device is that the antenna configured to resonate at a first frequency can also be configured to resonate at a second frequency. Therefore, in a first operating mode, the active matching device enables the antenna to transmit and receive electromagnetic radiation at the first frequency, and in a second operating mode, the active matching device enables the antenna to transmit and receive electromagnetic radiation at the second frequency. Therefore, it is advantageous that the antenna can transmit and receive electromagnetic radiation at both the first and second frequencies. It is also advantageous that the antenna can transmit and receive electromagnetic radiation at the first frequency in the first mode and at the second frequency in the second mode. Therefore, it is advantageous that the same antenna, such as a single antenna or an electrical antenna, enables the hearing device to wirelessly communicate with other hearing devices or electronic devices at different or multiple frequencies (e.g., more than one frequency, such as the first and second frequencies).

[0011] An electrical antenna with a specific actual or physical size (such as a specific length and / or volume) can transmit and receive electromagnetic radiation at a specific frequency with / with a specific antenna efficiency, such as radiation efficiency, polarization, bandwidth and radiation mode.

[0012] The advantage is that the antenna can transmit and receive at more than one frequency without changing the physical size of the antenna. In other words, it is advantageous that when the hearing device is in the first operating mode, the active matching device enables the antenna to transmit and receive at the first frequency, and when the hearing device is in the second operating mode, the active matching device enables the antenna to transmit and receive at the second frequency, without changing the physical size of the antenna.

[0013] In some embodiments, the antenna can transmit and receive at more than one frequency without sacrificing antenna efficiency, for example, without sacrificing at least a significant or substantial amount of antenna efficiency. In other words, the active matching device can be configured such that when the hearing device is in a first operating mode, the antenna can transmit and receive at a first frequency, and when the hearing device is in a second operating mode, the antenna can transmit and receive at a second frequency, without sacrificing antenna efficiency, for example, without sacrificing at least a substantial amount of antenna efficiency, whether for the first frequency or the second frequency.

[0014] In some embodiments, enabling the antenna to transmit and receive at a first frequency when the hearing device is in a first operating mode means that the antenna efficiency at the first frequency is higher than a first threshold efficiency. In some embodiments, enabling the antenna to transmit and receive at a second frequency when the hearing device is in a second operating mode means that the antenna efficiency at the second frequency is higher than a second threshold efficiency.

[0015] In some embodiments, the first threshold efficiency and the second threshold efficiency are the same threshold efficiency. The active matching device can therefore be configured such that when the hearing device is in a first operating mode, the antenna can transmit and receive at a first frequency, and when the hearing device is in a second operating mode, the antenna can transmit and receive at a second frequency, without sacrificing antenna efficiency, for example, at least not by a significant amount, whether for the first frequency or the second frequency.

[0016] In some embodiments, the first threshold efficiency and the second threshold efficiency are different. In some embodiments, the first threshold efficiency is higher than the second threshold efficiency. In some embodiments, the first threshold efficiency is 10% higher than the second threshold efficiency, for example, at least 10% higher than the second threshold efficiency.

[0017] In some embodiments, the active matching device and the antenna can be configured together. In some embodiments, the active matching device and the antenna can be configured together to achieve at least a first threshold efficiency in a first mode and at least a second threshold efficiency in a second mode.

[0018] In some embodiments, the antenna is configured to optimize antenna efficiency at a first frequency. For example, the physical implementation of the antenna may be configured to optimize antenna efficiency at the first frequency. In some embodiments, the antenna is configured to resonate at the first frequency. In some embodiments, the physical implementation of the antenna is chosen such that the antenna resonates at the first frequency, i.e., a resonant response. Typically, configuring the antenna to have optimized efficiency at the first frequency is a trade-off, and therefore the antenna efficiency at another frequency, including the second frequency, will be lower. An advantage of the present invention is that antenna efficiency at the second frequency can be improved by including an active matching device.

[0019] The head of a user or wearer of a hearing aid can act as an obstacle to sound wave propagation. Furthermore, the user's head can also obstruct the propagation of radio frequency (RF) waves or signals. This effect depends on the frequency or wavelength of the signal. For longer wavelengths relative to head size, the head's effect is less or less significant; for shorter wavelengths relative to head size, the effect is more or less significant. Therefore, when designing hearing aids for RF wireless communication, the effect of the user's head as an obstacle at a given RF frequency is typically considered, especially for long-range wireless communication such as broadcasting. Optimizing hearing aids for wireless communication at a given RF frequency requires the ability to optimize antenna characteristics and / or antenna construction, among other things.

[0020] The advantage is that the hearing device can be optimized to communicate wirelessly with other hearing devices or electronic devices at a first frequency, such that, for example, the antenna efficiency at the first frequency can be higher than that at the second frequency, or the antenna polarization or radiation pattern at the first frequency can be optimized to avoid the challenges posed by the antenna being close to the human head.

[0021] Advantageously, the hearing device can be optimized for wireless communication with other hearing devices or other electronic devices at a first frequency and a second frequency. In some embodiments, optimizing the hearing device for wireless communication with other hearing devices or electronic devices at the first frequency and the second frequency can result in the antenna efficiency at the first frequency being equal to or the same as the antenna efficiency at the second frequency, for example, approximately equal to or substantially the same as the antenna efficiency at the second frequency.

[0022] In some embodiments, optimizing a hearing device to wirelessly communicate with other hearing devices or electronic devices at a first frequency and a second frequency may make the efficiency of the first antenna at the first frequency higher than that of the antenna at the second frequency.

[0023] In some embodiments, the hearing device may use the 2.4 GHz ISM band and / or the 1.6 GHz ISM band. Therefore, in some embodiments, a first frequency is selected in the 2.4 GHz ISM band, and a second frequency is selected in the 1.6 GHz ISM band. Advantageously, the hearing device can wirelessly communicate with other hearing devices or electronic devices at two different frequencies (e.g., a first frequency and a second frequency). It is advantageous that the hearing device can wirelessly communicate with other hearing devices or electronic devices using the 2.4 GHz ISM band and / or the 1.6 GHz ISM band.

[0024] The hearing device can be configured to communicate with one or more external devices, such as one or more external electronic devices, including at least one smartphone, at least one tablet computer, at least one hearing accessory device, including at least one spouse microphone, remote control, audio testing device, etc., or in some embodiments, to communicate with another hearing device, such as another hearing device located in the other ear, typically in a binaural hearing device system.

[0025] Therefore, it is advantageous that the hearing device provides improved communication with other hearing devices, such as another hearing device in a binaural hearing device system or an external electronic device such as a smartphone.

[0026] The hearing device may include a first transducer, i.e., a microphone, to generate one or more microphone output signals based on received audio signals. The hearing device includes a signal processor. One or more microphone output signals may be provided to the signal processor for processing. The hearing device may include a receiver or a speaker or amplifier. The receiver may be connected to the output of the signal processor to convert the signal processor's output into a modified signal to compensate for the user's hearing impairment, and the modified signal may be provided to the receiver.

[0027] A hearing device can be any hearing device, such as any hearing device that compensates for hearing loss in a user, or any hearing device that provides sound to a user. Those skilled in the art are familiar with different types of hearing devices and different options for placing the hearing device in and / or on the ear of a user.

[0028] For example, the hearing device can be a behind-the-ear (BTE) hearing device, wherein the behind-the-ear module includes hearing device components provided as an assembly and mounted in a housing configured to be worn behind the user's ear in the operating position. Typically, a sound tube extends from the hearing device housing to the user's ear canal.

[0029] For example, a hearing device can be an in-ear receiver type hearing device, where the receiver is located in the user's ear during use, such as in the ear canal, for example, as part of an in-ear module, while other hearing device components, such as a processor, wireless communication unit, battery, etc., are provided as a post-ear module. Typically, a tube connects the in-ear module and the post-ear module. It should be envisioned that the tube module containing the tube may include additional hearing instrument components and connectors.

[0030] For example, the hearing device can be an in-the-ear (ITE) or completely in-the-canal (CTAC) hearing device, wherein the hearing device is disposed in the user's ear. Therefore, the ITE module includes hearing device components, including a processor, a wireless communication unit, a battery, a microphone, and a speaker, etc. The ITE module may have one or more components extending into the ear canal. The ITE module can thus be configured to be positioned in the ear and in the ear canal.

[0031] Hearing devices include a signal processor. The signal processor may be a digital signal processor (DSP). The signal processor may include components such as amplifiers, compressors, and / or noise reduction systems. The signal processor may be implemented in a signal processing chip. The signal processor may be disposed in / on a printed circuit board, for example, arranged or mounted in / on a printed circuit board. The signal processing chip and / or printed circuit board may include additional electronic components. Hearing devices may also include filtering functions, such as compensation filters for optimizing the output signal.

[0032] In this invention, a signal processor is configured to determine the operating mode of the hearing device. The hearing device mode includes a first operating mode and a second operating mode. The signal processor may be configured to provide a control signal to an active matching device, the control signal providing information about the operating mode of the hearing device.

[0033] In some embodiments, the signal processor is configured to select a first operating mode for a first type of wireless communication and a second operating mode for a second type of wireless communication. In some embodiments, the first operating mode is selected for wireless communication types requiring high efficiency. In some embodiments, the first operating mode is selected for low-power communication. In some embodiments, the first operating mode is used for communicating with a hearing device in the user's other ear. In some embodiments, the second operating mode is used for communicating with another external electronic device. In some embodiments, the first operating mode can be selected for wireless communication with specific latency requirements. In some embodiments, the first operating mode can be selected for wireless communication requiring low latency, for example, for enabling audio streaming.

[0034] The hearing device can wirelessly communicate with other hearing devices or electronic devices at a first frequency in a first hearing device operating mode. The hearing device can wirelessly communicate with other hearing devices or electronic devices at a second frequency in a second hearing device operating mode.

[0035] A hearing device may include a wireless communication unit. The hearing device may include a first wireless communication unit and a second wireless communication unit. In some embodiments, the first and second wireless communication units are implemented as the same wireless communication unit. The hearing device may include first and second wireless communication units, such as a first wireless communication unit and a second wireless communication unit. The wireless communication unit may be implemented as a wireless communication circuit. The first and second wireless communication units may be implemented as first and second wireless communication circuits, respectively. The wireless communication unit may be configured for wireless communication, including wireless data communication, and in this respect may be interconnected with an antenna to transmit and receive electromagnetic fields. The first and second wireless communication units may be configured for wireless communication, including wireless data communication, and in this respect may be interconnected with an antenna to transmit and receive electromagnetic fields. Wireless communication units such as the first and second wireless communication units may be configured to interconnect a signal processor with an antenna to provide wireless communication with other hearing devices and / or other external electronic devices.

[0036] Each wireless communication unit may include a transmitter, a receiver, a transmitter-receiver pair, such as a transceiver, a radio unit, etc. Each wireless communication unit may be configured to communicate using any protocol known to those skilled in the art, including Bluetooth (including Bluetooth Low Energy, Bluetooth Smart, etc.), WLAN standards, manufacturer-specific protocols such as custom proximity antenna protocols, and proprietary protocols such as low-power wireless communication protocols such as CSR mesh.

[0037] The hearing device includes an antenna for transmitting and receiving electromagnetic radiation. In some embodiments, the antenna is an electrical antenna. The antenna is configured to resonate at a first frequency. In some embodiments, the antenna is a resonant antenna at the first frequency. It is advantageous to operate the antenna at or near the resonant frequency, for example, at the frequency at which the antenna resonates, because the antenna efficiency can be at or near its maximum efficiency at the resonant frequency. The resonant antenna can have, for example, essentially or approximately purely resistive, without any reactance (capacitance or inductance) at the antenna feed point. Therefore, it is advantageous for the antenna to be a resonant antenna at the first frequency, because this can provide an improved impedance interface, such as improved impedance matching or impedance bridging, between the antenna and the first wireless communication unit in the first mode.

[0038] The antenna can be an electrical antenna. The antenna can be configured to operate at radio frequencies, such as radio frequencies above 800 MHz, such as above 1 GHz, such as above 1.5 GHz. The antenna can be configured to operate at radio frequencies, such as in one or more ISM bands. The antenna can be any antenna capable of operating at these frequencies. The antenna can be implemented in any manner; the antenna can be a monopole antenna, a dipole antenna, etc. The antenna can be a loop antenna, such as an open-loop antenna. The antenna can be any known antenna, such as any electrical antenna, and the antenna can be or may include an elongated conductive material configured to emit or receive electromagnetic radiation in any known manner.

[0039] In some embodiments, the antenna can resonate at a first frequency in a first operating mode, for example, it is a resonant antenna, and the active matching device can be configured such that the antenna can resonate at a second frequency in a second operating mode, for example, it is a resonant antenna. Therefore, the antenna can transmit and / or receive two electromagnetic signals, such as radiated signals, with different frequencies. The antenna can be interconnected with a first wireless communication unit and a second wireless communication unit.

[0040] Antennas can be provided in an antenna configuration, such as antenna arrangement or setup. An antenna configuration may include an antenna. An antenna configuration may also include active matching devices. The term antenna configuration can be used to describe how an antenna is constructed, arranged, or provided in a hearing device, such as how the antenna is connected and / or excited.

[0041] The hearing device includes an active matching device. The active matching device is used to interconnect a first wireless communication unit and a second wireless communication unit with an antenna. Therefore, the active matching device can be positioned between the antenna and the first and second wireless communication units. The active matching device can be an active matching device, rather than a passive matching device, because the active matching device can be configured to receive control signals from a signal processor. The active matching device can include switches, such as one or more switches, for example, at least one switch. The one or more switches can be configured to remove or restore a conductive path in a circuit during operation. The one or more switches can be configured to include a set or pair of contacts, such as a set or more sets of contacts, which can be configured to operate simultaneously (e.g., sequential or alternating operation). The one or more switches can be any kind or type of switch, such as a single-throw switch, a double-throw switch, a changeover switch, a "single-pole single-throw" (SPST) switch, or a "single-pole double-throw" (SPDT) switch. The one or more switches can be of different types of switches, for example, one switch is one type of switch and another switch is another type of switch. Therefore, the one or more switches can specify that the active matching device can be configured to switch between at least two conductive paths, such as at least two circuits, for example, at least two matching circuits. Switching can be determined by or depend on the operating mode of the hearing device, for example, by a control signal that can provide information about or belongs to the hearing device's operating mode. The control signal can be provided by or originate from a signal processor.

[0042] In the first mode, the active matching device is configured to enable the antenna to transmit and receive electromagnetic radiation at a first frequency. In the second mode, the active matching device is configured to adjust, for example, modify, change, tune, or transform the antenna characteristics to enable the antenna to transmit and receive electromagnetic radiation at a second frequency. Therefore, in the first operating mode, the active matching device can interconnect (e.g., connect) the first wireless communication unit and the antenna / to the antenna. In the second operating mode, the active matching device can interconnect (e.g., connect) the second wireless communication unit to the antenna. Thus, the active matching device can interconnect the antenna with either the first or second wireless communication unit, depending on the operating mode of the hearing device. In other words, in the first mode, the active matching device can be configured such that the antenna is interconnected with the first wireless communication unit, and the active matching device can be configured such that the antenna can transmit and receive electromagnetic radiation, such as a signal, at the first frequency. In the second mode, the active matching device can be configured such that the antenna is interconnected with the second wireless communication unit, and the active matching device can be configured such that the antenna can transmit and receive electromagnetic radiation, such as a signal, at the second frequency.

[0043] The first frequency can be 2.4 GHz. The second frequency can be 1.6 GHz. Although the present invention relates to electromagnetic radiation at specific frequencies, such as a first frequency and a second frequency, it will be apparent to those skilled in the art that electromagnetic radiation, such as electromagnetic signals, emitted and / or received by an antenna has a certain frequency band or bandwidth. The bandwidth includes a continuous frequency band, and the bandwidth can be defined by a center frequency. Therefore, the first frequency can be a first center frequency having a first bandwidth. The first center frequency can be 2.4 GHz, for example, 2.35 GHz or 2.44 GHz. The first bandwidth can be 2.3 GHz to 2.5 GHz. The second frequency can be a second center frequency having a second bandwidth. The second center frequency can be 1.6 GHz, for example, 1.55 GHz or 1.64 GHz. The second bandwidth can be 1.5 GHz to 1.7 GHz.

[0044] In some embodiments, the active matching device is configured to adjust one or more of the following antenna characteristics: antenna impedance, antenna electrical length, and radiation efficiency. Antenna characteristics may additionally include gain and radiation intensity. One or more antenna characteristics may be adjusted, for example, by a change in the current distribution on the antenna, such as a change in the current amplitude on the antenna. Adjustment of one or more antenna characteristics may, for example, implicitly or inherently alter further characteristics of the antenna radiation characteristics, and may, for example, change the antenna's radiation pattern and / or polarization and / or directivity.

[0045] Therefore, active matching devices can be configured to adjust one or more antenna characteristics. Those skilled in the art will recognize that antenna design for compact devices such as hearing aids is a significant challenge due to the practical and fundamental design trade-offs associated with antenna characteristics. Those skilled in the art will also recognize that antenna characteristics can be correlated with each other, such that a change in one antenna characteristic can also provide a change in the characteristics of the others.

[0046] The antenna characteristics of the antenna in the second operating mode may be different from or dissimilar to the antenna characteristics in the first operating mode. For example, one or more antenna characteristics of the antenna in the second operating mode may be different from one or more antenna characteristics in the first operating mode.

[0047] Optionally or additionally, one or more antenna characteristics of the antenna in the second operating mode may be the same as or equivalent to one or more antenna characteristics in the first operating mode, for example, substantially or approximately the same.

[0048] Optionally or additionally, the electrical length of the antenna in the second mode may differ from the electrical length of the antenna in the first mode.

[0049] Optionally or additionally, the impedance of the antenna in the first mode may be the same as or comparable to the impedance of the antenna in the second mode, for example, substantially or approximately the same.

[0050] Advantageously, the active matching device is configured to adjust one or more antenna characteristics, as this enables the antenna to transmit and receive electromagnetic radiation at a second frequency. Therefore, adjusting one or more antenna characteristics allows the antenna to resonate at or near the second frequency. Advantageously, adjusting one or more antenna characteristics allows the hearing device to be configured to wirelessly communicate with other hearing devices or electronic devices at both the first and second frequencies.

[0051] Advantageously, the active matching device is configured to adjust the characteristics of one or more antennas, as this provides flexibility in the design of the hearing device, particularly because it enables communication at both the first and second frequencies using the same antenna (e.g., the same electrical antenna). Given the strict limitations imposed on the size of hearing devices, the ability to communicate at multiple frequencies (e.g., the first and second frequencies) using a single antenna is advantageous.

[0052] Advantageously, one or more antenna characteristics can be adjusted because this allows for optimization of one or more antenna characteristics in different operating modes, such as in a first mode or a second mode, or in both operating modes. Another advantage is that the same one or more antenna characteristics may not need to be optimized in both modes. For example, radiation efficiency can be optimized for the first mode, while it may not need to be optimized for the second mode. Alternatively, for example, radiation efficiency can be optimized for both the first and second modes.

[0053] In other words, advantageously, by adjusting the characteristics of one or more antennas, the hearing device can be optimized for wireless communication with other hearing devices or electronic devices at a first frequency. Alternatively, advantageously, by adjusting the characteristics of one or more antennas, the hearing device can be optimized for wireless communication with other hearing devices or electronic devices at both a first and a second frequency.

[0054] In some embodiments, adjusting antenna characteristics alters the current distribution along the antenna and / or the antenna's frequency response. The current distribution may include the amplitude of the current. Therefore, for example, adjusting or changing or modifying the electrical length of the antenna can adjust, change, or modify the current distribution along the antenna. Optionally or additionally, adjusting the electrical length of the antenna can change the antenna's frequency response. Therefore, the current distribution along the antenna and / or the antenna's frequency response can be changed by adjusting one or more antenna characteristics.

[0055] Advantageously, adjusting antenna characteristics alters the current distribution along the antenna and / or the antenna's frequency response, providing flexibility in designing hearing devices. For example, the current distribution along the antenna may be optimized for a first mode, while it may not be optimized for a second mode. Alternatively, for example, the current distribution along the antenna may be optimized for both the first and second modes.

[0056] In some embodiments, the hearing device further includes a duplexer interconnecting the first and second wireless communication units with an active matching device. The duplexer is configured to isolate or filter signals at a first frequency from signals at a second frequency. The duplexer can interconnect the first wireless communication unit with the active matching device. The duplexer can interconnect the second wireless communication unit with the active matching device. The duplexer can be disposed between the first and second wireless communication units and the active matching device, and the active matching device can be disposed between the duplexer and an antenna. Therefore, the duplexer can be configured to interconnect (e.g., connect) the antenna to the first and second wireless communication units respectively. The duplexer can be a passive device that implements frequency domain multiplexing. Advantageously, the duplexer allows the same active matching device to be used for the first and second wireless communication units. The duplexer can be any suitable data splitter or selector known to those skilled in the art, such as a multiplexer or filter. Therefore, the duplexer can be implemented as a bandpass filter, low-pass filter, high-pass filter, surface acoustic wave (SAW) filter, band-stop filter, notch filter, and / or bulk acoustic wave (BAW) filter.

[0057] By placing a duplexer between the first and second wireless communication units and the active matching device, the signal provided to the active matching device is a full-duplex signal. Therefore, any signal from the active matching device is directly provided to the antenna without intermediate processing. Consequently, any adjustments to one or more antenna characteristics (e.g., antenna impedance, antenna electrical length, and radiation efficiency) are provided to the antenna without additional processing. Furthermore, placing a duplexer between the first and second wireless communication units and the active matching device reduces losses in the duplexer because the duplexer receives the impedance matching signal from the antenna, i.e., the impedance matching signal from the antenna is provided via the active matching device.

[0058] In some embodiments, the active matching device includes a first matching circuit. The first matching circuit is configured to match the impedance of the antenna to the first wireless communication unit in a first mode. In a first operating mode, the first matching circuit, such as a first electrical matching network or a first antenna tuner, can adjust or match the impedance of the antenna to the impedance of the first wireless communication unit. Advantageously, the first matching circuit of the active matching device can provide an impedance-matched interface between the antenna and the first wireless communication unit. The impedance-matched interface between the antenna and the first wireless communication unit can prevent reflections and can provide efficient power transfer to / from the antenna.

[0059] In some embodiments, the active matching device includes a second matching circuit. The second matching circuit includes a primary matching circuit configured to match the impedance of an antenna to a second wireless communication unit and a secondary matching circuit configured to adjust antenna characteristics of the antenna to match a second frequency in a second mode. The secondary matching circuit (e.g., a second electrical matching network or a second antenna tuner) may be configured to match the impedance of the antenna to the impedance of the second wireless communication unit. Additionally, the second matching circuit may be configured to adjust antenna characteristics to match the second frequency. In a second operating mode, the primary matching circuit of the second matching circuit may adjust or match the impedance of the antenna to the impedance of the second wireless communication unit. In a second operating mode, the secondary matching circuit of the second matching circuit may be configured to adjust one or more antenna characteristics of the antenna to match the second frequency. Therefore, one or more antenna characteristics can be adjusted so that the antenna can resonate at the second frequency.

[0060] Advantageously, the second matching circuit of the active matching device (e.g., the primary matching circuit of the second matching circuit) provides an impedance matching interface between the antenna and the second wireless communication unit. This impedance matching interface between the antenna and the second wireless communication unit can prevent reflections and can provide efficient power transfer to / from the antenna. Furthermore, it is advantageous that the second matching circuit of the active matching device (e.g., the secondary matching circuit of the second matching circuit) allows the antenna to resonate at a second frequency. Therefore, it is advantageous that the second matching circuit of the active matching device (e.g., the secondary matching circuit of the second matching circuit) allows the resonant frequency of the antenna to be changed from a first frequency to a second frequency, for example, allowing the resonant frequency of the antenna to be adjusted or changed from the first frequency to the second frequency.

[0061] Advantageously, the second matching circuit enables the impedance of the antenna to match the impedance of the second wireless communication unit, and also enables, for example, the antenna characteristics of the antenna to be adjusted simultaneously to match the second frequency, so that the antenna can resonate at the second frequency.

[0062] In some embodiments, the first matching circuit and the primary matching circuit are the same matching circuit. Therefore, the primary matching circuit of the first matching circuit and the second matching circuit can be the same matching circuit. In other words, the first matching circuit can be the same as, for example, identical or equivalent to, the primary matching circuit. Advantageously, the first matching circuit and the primary matching circuit are the same matching circuit because this allows the first matching circuit to be used as the primary matching circuit or the primary matching circuit to be used as the first matching circuit. Advantageously, for both the first operating mode and the second operating mode, electrical components (e.g., the first matching circuit and / or the primary matching circuit) of the provided circuit can be used. This reduces the space or volume required for the electrical components or circuits disposed in the hearing device.

[0063] In some embodiments, the first matching circuit and / or the primary matching circuit are configured to connect the first and second wireless communication units to the antenna, respectively, to improve power transmission between them by matching the specified load impedances of the first and second wireless communication units to the input impedance of the antenna (which may include any input impedance of the transmission line).

[0064] In some embodiments, each of the first matching circuit and the second matching circuit includes one or more components, such as at least one component selected from resistors, capacitors, inductors, diodes, and transistors. The primary and secondary matching circuits of the second matching circuit may include one or more components selected from the group consisting of resistors, capacitors, inductors, diodes, and transistors. One or more components of the first matching circuit may differ from one or more components of the second matching circuit. Optionally, at least one component of the first matching circuit may be similar to or the same as at least one component of the second matching circuit. Furthermore, at least one component of the first matching circuit may be the same component as at least one component of the second matching circuit. For example, the first matching circuit may include an inductor, and the second matching circuit may include an inductor and a capacitor. Optionally or additionally, at least one component of the first matching circuit may be the same component as at least one component of the primary matching circuit and may differ from at least one component of the secondary matching circuit. In one example, the first matching circuit may include at least an inductor, the primary matching circuit may include at least an inductor, and the secondary matching circuit may include at least a capacitor.

[0065] In some embodiments, the signal processor is configured to provide a control signal to the active matching device in response to the determination of the hearing device mode. Therefore, the signal processor can determine the operating mode and provide a control signal containing that information to the active matching device. The control signal can be a digital signal using logic or logic levels. The control signal can include binary numbers 1 and 0.

[0066] In some embodiments, the active matching device is configured to switch between a first matching circuit and a second matching circuit according to a control signal. The active matching device may be configured to receive the control signal. The active matching device may be configured to switch between the first and second matching circuits in response to receiving the control signal, the control signal including information about the hearing device's operating mode (e.g., operating mode). Therefore, when the signal processor determines that the hearing device should change its operating mode from a first operating mode to a second operating mode, the signal processor may provide the active matching device with the control signal containing this information, and in response to the control signal, the active matching device may switch to the second matching circuit, allowing the antenna to interconnect with a second wireless communication unit, and may adjust the antenna characteristics to enable the antenna to transmit and receive electromagnetic radiation at a second frequency. Similarly, when the signal processor determines that the hearing device should change its operating mode from the second operating mode to the first operating mode, the signal processor may provide the active matching device with the control signal containing this information, and in response to the control signal, the active matching device may switch to the first matching circuit, allowing the antenna to interconnect with a first wireless communication unit, and enabling the antenna to transmit and receive electromagnetic radiation at a first frequency. Advantageously, the active matching device is configured to switch between a first matching circuit and a second matching circuit according to a control signal, because this allows the hearing device to be configured to switch between first and second operating modes. Advantageously, the hearing device can be configured to operate in two modes, for example, in a first mode or a second mode. Therefore, it is advantageous that the hearing device can be configured to wirelessly communicate with other hearing devices or electronic devices in either the first or second mode, and the hearing device can be configured to wirelessly communicate with other hearing devices or electronic devices while switching between the first and second modes.

[0067] In some embodiments, the antenna in the first mode is configured to have a full wavelength corresponding to the first frequency, for example, an electrical length of + / - 10% of the full wavelength.

[0068] In some embodiments, the antenna in the second mode is configured to have an electrical length corresponding to half the wavelength of the second frequency, for example, half the wavelength + / - 10%, or for example, half the wavelength + / - 25%. The antenna in the second mode can be configured to have an electrical length 10%-25% larger than the half-wavelength at the second frequency. The antenna in the second mode can also be configured to have an electrical length 10%-25% shorter than the half-wavelength at the second frequency.

[0069] The electrical length of an antenna can differ from its physical length. The electrical length of an antenna can be adjusted without changing its physical length. The electrical length of an antenna can be changed by incorporating components connected in series with it. An active matching device can change the electrical length of the antenna. An active matching device can be configured to increase the electrical length of the antenna. An active matching device can be configured to decrease the electrical length of the antenna. In some embodiments, the secondary matching circuit is configured to change the electrical length of the antenna, for example, by increasing or decreasing it.

[0070] Advantageously, in the first mode, the antenna can be used as a full-wavelength antenna, for example, essentially or approximately as a full-wavelength antenna.

[0071] Furthermore, it is advantageous that in the second mode, the antenna can be used as a half-wavelength antenna, for example, substantially or approximately as a half-wavelength antenna. Therefore, it is advantageous that the active matching device can be configured to adjust the electrical length of the antenna such that the electrical length of the antenna in the first mode corresponds to + / -10% of the full wavelength at the first frequency, and such that the electrical length of the antenna in the second mode corresponds to + / -10% of the half-wavelength at the second frequency, or for example, such that the electrical length of the antenna in the second mode corresponds to + / -25% of the half-wavelength at the second frequency.

[0072] In some embodiments, the first frequency and the second frequency are different frequencies. In some embodiments, the first frequency is higher than the second frequency. The second frequency is equal to or higher than half of the first frequency. The first frequency may be higher than the second frequency. The second frequency may be equal to half of the first frequency, for example, such that the second frequency may be the same as or equal to half of the first frequency. The second frequency may be higher than half of the first frequency.

[0073] In some embodiments, the first frequency and the second frequency are of the same order of magnitude. In some embodiments, the first frequency corresponds to twice the second frequency. In some embodiments, the first frequency is not twice the second frequency. In some embodiments, the first frequency is between 1.1 and 1.9 times the second frequency. In some embodiments, the first frequency is between 1 1 / 3 and 1 2 / 3 of the second frequency. In some embodiments, the difference between the first frequency and the second frequency is less than half of the second frequency, for example, approximately half of the second frequency.

[0074] For example, the first frequency can be 2.4 GHz, and the second frequency can be equal to or higher than half of the first frequency, such as 1.2 GHz, 1.3 GHz, 1.4 GHz, 1.5 GHz, 1.6 GHz, 1.7 GHz, 1.8 GHz, or 1.9 GHz. In a preferred embodiment, the second frequency can be 1.6 GHz.

[0075] In some embodiments, the antenna characteristics of the antenna in the second mode are adjusted to obtain a resonant antenna at a second frequency or at a frequency within + / -20% of the second frequency. In other words, in the second mode, the antenna may resonate at the second frequency or at a frequency within + / -20% of the second frequency (e.g., substantially or approximately at the second frequency), or may be a resonant antenna.

[0076] Advantageously, the antenna can be a resonant antenna at the second frequency in the second mode, or a substantially resonant antenna, because a resonant antenna can have essentially or approximately purely resistive properties without any reactance (capacitance or inductance) at the antenna feed point. Therefore, it is advantageous for the antenna to be a resonant antenna at the second frequency, as this can provide an improved impedance interface, such as improved impedance matching or impedance bridging, between the antenna and the second wireless communication unit in the second mode.

[0077] The hearing device may include a housing. The housing may be a behind-the-ear housing configured to be located behind the user's ear during use. The housing may include a first side and a second side. The first side of the housing may be arranged opposite to the second side of the housing. The first side of the housing may be, for example, a first longitudinal side of the hearing device, and the second side of the housing may be, for example, a second longitudinal side of the hearing device. An antenna may be housed within the housing, with its longitudinal direction extending along the length of the housing. The antenna may be housed within the hearing device housing, preferably positioned within the housing without protruding outside the housing.

[0078] An antenna can be arranged within a hearing device, for example, disposed or housed within the hearing device. The hearing device may include a first side and a second side. The first side may be arranged opposite the second side. The first side of the hearing device may be, for example, a first longitudinal side of the hearing device, while the second side of the hearing device may be, for example, a second longitudinal side of the hearing device. The antenna can be housed within the hearing device, and the longitudinal direction of the antenna extends along the length of the hearing device.

[0079] An antenna can be disposed within a hearing device such that at least a portion of the antenna extends from a first side of the hearing device to a second side of the hearing device. The antenna may include one or more portions or components. The one or more portions may be connected and may form a loop. A portion of the antenna, such as a first portion, may be provided or disposed on the first side of the hearing device. A portion of the antenna, such as a second portion, may be provided or disposed on the second side of the hearing device. In some embodiments, a portion of the antenna, such as a third portion, may be provided or disposed on the top of the hearing device. The third portion may connect to the first and second portions of the antenna. The top of the hearing device may be a longitudinally oriented top of the hearing device. When the hearing device is worn in an operating position at the user's ear, the top of the hearing device may be substantially (e.g., generally) upward.

[0080] In some embodiments, the antenna in the first mode is configured to have a maximum current, for example, a maximum current value, at the portion of the antenna parallel to the user's interauricular axis when the hearing device is worn on the user's ear in the operating position. Therefore, in the first mode, the current distribution along the antenna can be distributed such that the current supplied along the antenna can have a maximum value at the portion of the antenna parallel to the user's interauricular axis when the hearing device is worn on the user's ear in the operating position. Furthermore, in the second operating mode, the antenna can also be configured to have a maximum current at the portion of the antenna parallel to the user's interauricular axis when the hearing device is worn on the user's ear in the operating position. The maximum current in the second mode can have an amplitude different from the maximum current in the first mode.

[0081] When the hearing device is worn in the operating position on the user's ear, the part of the antenna parallel to the user's interaural axis can be the third part of the antenna and can be located on the top of the hearing device.

[0082] In some embodiments, the current flowing in the antenna can form a standing wave along the electrical length of the antenna. Therefore, the portion of the antenna with the maximum current (e.g., the location or area of ​​the maximum current) will be at the maximum value of the current standing wave along the electrical length of the antenna.

[0083] Advantageously, the antenna in the first mode can be configured to have the maximum current in the portion of the antenna parallel to the user's interauricular axis when the hearing device is worn in the operating position at the user's ear. This allows at least a portion of the electromagnetic field emitted by the antenna to propagate along the surface of the user's head and around the user's head. Another advantage is that the electric field of this electromagnetic field can have a direction that is substantially orthogonal to the surface of the user's head. In other words, the electric field of the emitted electromagnetic field can be higher in the direction orthogonal to the user's head.

[0084] Furthermore, advantageously, the antenna in the first mode can be configured to have maximum current in the portion of the antenna parallel to the user's interauricular axis when the hearing device is worn in the operating position at the user's ear. This allows the polarization of the electromagnetic field to have a direction that is substantially orthogonal to the surface of the user's head. In other words, the polarization of the electromagnetic field can be higher in the direction orthogonal to the user's head.

[0085] The orthogonal direction of the provided electric field is advantageous because it is the best choice for exciting strong surface waves (i.e., electromagnetic waves) along the body, such as along the user's face or head, to the user's other ear. The provided antenna polarization and the orthogonal direction of the electric field can be optimized to excite a strong electromagnetic field with a wide range. Therefore, it is advantageous in the first mode to configure the antenna to have the maximum current in the portion of the antenna parallel to the user's interauricular axis when the hearing device is worn in the operating position at the user's ear, as this can minimize loss due to interaction with the user's head surface. This can also provide more robust wireless communication against damage and support improved transmission and reception around obstacles presented by the user's head.

[0086] In some embodiments, the antenna includes a first end. The first end of the antenna may be connected to a feed source, such as a first feed source, on a first side of the hearing aid. In some embodiments, the antenna includes a second end. The second end of the antenna may be connected to a ground potential on a second side of the hearing aid. The second side of the hearing aid may be opposite to the first side of the hearing aid. The antenna may have a first electrical length. The portion of the antenna extending from the first side of the hearing aid to the second side of the hearing aid may be approximately half of the first electrical length.

[0087] In some embodiments, the portion of the antenna extending from the first side of the hearing device to the second side of the hearing device is approximately half the first electrical length, may be the same portion as the third portion of the antenna, and may be positioned on top of the hearing device.

[0088] This can be advantageous because it minimizes damage caused by interaction with the user's head surface. Therefore, this could provide more robust wireless communication against damage and further support improved transmission and reception that bypasses obstacles presented by the user's head.

[0089] Antenna configurations can be tailored to achieve a desired current distribution along the antenna. Feed sources (e.g., a first feed source) and connections to ground can be configured to achieve the desired current distribution along the antenna. In some embodiments, feed sources such as the first feed source and connections to ground can be adjacent to each other or positioned relatively close to each other. In some embodiments, feed sources and connections to ground can be arranged in a manner that supports the desired current distribution while minimizing any implementation obstacles.

[0090] Optionally, the second end can be connected to a feed source located on the second side of the hearing device, such as a second feed source. Alternatively, the second end can be connected to a feed source located on the first side of the hearing device, such as a second feed source. Alternatively, the first end can be connected to a first feed source and the second end can be connected to a second feed source, and both ends and the feed source can be located on the second side of the hearing device. The first and second feed sources can be configured separately to obtain the desired current distribution. For example, the first and second feed sources can be adjacent to each other or can be relatively close to each other.

[0091] A feed source can be a power supply point or an excitation point. The feed source can be electrically connected to a source such as a first or second wireless communication unit, or a radio chip such as a transceiver, receiver, or transmitter. The antenna can be excited using any conventional method, for example, using direct, indirect, or coupled feeding. The antenna can be fed using a feed line such as a transmission line.

[0092] The second end of the antenna can be connected to a ground potential via or through a ground plane. The ground plane can be formed of any material capable of conducting current when the antenna is excited. The ground plane can be a printed circuit board. The ground plane can also be formed as a single conductive path (e.g., copper) to conduct current. The ground potential can be zero potential or relative to ground.

[0093] The first end of the antenna can be the end of a first portion of the antenna disposed on a first side of the hearing device. The second end of the antenna can be the end of a second portion of the antenna disposed on a second side of the hearing device. The antenna portion extending from the first side of the hearing device to the second side of the hearing device can be a third portion of the antenna. In both the first and second modes, the third portion of the antenna can be approximately half the first electrical length. In the first mode, the third portion of the antenna can be located at approximately half the wavelength corresponding to the first frequency. In the second mode, the third portion of the antenna can be located at approximately one-quarter of the wavelength corresponding to the second frequency.

[0094] According to one aspect, a method of operating a hearing device is disclosed. The hearing device includes a signal processor. The hearing device includes first and second wireless communication units. The hearing device includes an antenna for transmitting and receiving electromagnetic radiation. The antenna is configured to resonate at a first frequency. The antenna may be an electrical antenna. The hearing device includes an active matching device. The method includes determining an operating mode of the hearing device in the signal processor, the hearing device mode including a first mode and a second mode. The method includes, in the first mode, interconnecting the first wireless communication unit with the antenna via the active matching device. The method includes, in the first mode, enabling the antenna to transmit and receive electromagnetic radiation at the first frequency. The method includes, in the second mode, interconnecting the second wireless communication unit with the antenna via the active matching device. The method includes, in the second mode, adjusting the antenna characteristics of the antenna to enable the antenna to transmit and receive electromagnetic radiation at a second frequency.

[0095] This invention can also be characterized by the following:

[0096] 1. A hearing device, comprising:

[0097] A signal processor configured to determine an operating hearing device mode, the hearing device mode including a first mode and a second mode;

[0098] First wireless communication unit and second wireless communication unit;

[0099] An electrical antenna for transmitting and receiving electromagnetic radiation, the antenna being configured to resonate at a first frequency;

[0100] An active matching device configured to interconnect the first wireless communication unit and the second wireless communication unit with the antenna;

[0101] In the first mode, the active matching device is configured to enable the antenna to transmit and receive electromagnetic radiation at a first frequency, and

[0102] In the second mode, the active matching device is configured to adjust the antenna characteristics of the antenna so that the antenna can transmit and receive electromagnetic radiation at a second frequency.

[0103] 2. The hearing device according to Item 1, wherein the active matching device is configured to adjust one or more of the following antenna characteristics: antenna impedance, antenna electrical length, and radiation efficiency.

[0104] 3. The hearing device according to any one of the preceding items, wherein the adjustment of the antenna characteristics changes the current distribution along the antenna and / or the frequency response of the antenna.

[0105] 4. The hearing device according to any one of the preceding items, further comprising a duplexer interconnecting the first wireless communication unit and the second wireless communication unit with the active matching device, the duplexer being configured to isolate the signal at the first frequency from the signal at the second frequency.

[0106] 5. The hearing device according to any one of the preceding items, wherein the active matching device includes a first matching circuit configured to match the impedance of the antenna with the first wireless communication unit in the first mode.

[0107] 6. The hearing device according to item 5, which is subordinate to item 4, wherein the active matching device includes a second matching circuit having a primary matching circuit configured to match the impedance of the antenna to the second wireless communication unit, and a secondary matching circuit configured to adjust the antenna characteristics of the antenna in a second mode to match the second frequency.

[0108] 7. The hearing device according to item 6, which is subordinate to item 5, wherein the first matching circuit and the primary matching circuit are the same matching circuit.

[0109] 8. The hearing device according to any one of items 5-7, wherein each of the first matching circuit and the second matching circuit includes one or more components selected from the group consisting of resistors, capacitors, inductors, diodes, and transistors.

[0110] 9. The hearing device according to any one of the preceding items, wherein the signal processor is configured to provide a control signal to the active matching device in response to the determination of the hearing device mode.

[0111] 10. The hearing device according to item 8, wherein the active matching device is configured to switch between the first matching circuit and the second matching circuit according to the control signal.

[0112] 11. The hearing device according to any one of the preceding items, wherein the antenna in the first mode is configured to have an electrical length corresponding to + / - 10% of the full wavelength at the first frequency.

[0113] 12. The hearing device according to any one of the preceding items, wherein the antenna in the second mode is configured to have an electrical length of + / -10% of half the wavelength corresponding to the second frequency, for example + / -25%.

[0114] 13. The hearing device according to any one of the preceding items, wherein the first frequency is higher than the second frequency, and the second frequency is equal to or higher than half of the first frequency.

[0115] 14. The hearing device according to any one of the preceding items, wherein the antenna characteristics of the antenna in the second mode are adjusted to obtain a resonant antenna at a second frequency or a frequency within + / -20% of the second frequency.

[0116] 15. The hearing device according to any one of the preceding items, wherein the antenna in the first mode is configured to have a maximum current in the portion of the antenna parallel to the user's interauricular axis when the hearing device is worn in an operating position at the user's ear.

[0117] 16. The hearing device according to any one of the preceding items, wherein the antenna has a first end connected to a feed source on a first side of the hearing device, and the antenna has a second end connected to a ground potential on a second side of the hearing device, the second side being opposite to the first side; wherein the antenna has a first electrical length, and the portion of the antenna extending from the first side to the second side is approximately half of the first electrical length.

[0118] 17. A method of operating a hearing device, wherein the hearing device comprises: a signal processor, a first wireless communication unit and a second wireless communication unit, an antenna for transmitting and receiving electromagnetic radiation and configured to resonate at a first frequency, and an active matching device.

[0119] The method includes the following steps:

[0120] The signal processor determines the operating hearing device mode, which includes a first mode and a second mode.

[0121] In the first mode:

[0122] The first wireless communication unit is interconnected with the antenna via the active matching device, and

[0123] This enables the antenna to transmit and receive electromagnetic radiation at a first frequency, and

[0124] In the second mode:

[0125] The second wireless communication unit is interconnected with the antenna via the active matching device, and

[0126] The antenna characteristics are adjusted so that the antenna can transmit and receive electromagnetic radiation at a second frequency.

[0127] The present invention relates to various aspects, including the hearing devices and methods described above and below, as well as corresponding systems, hearing devices, hearing aids, hearing protection devices, methods, and system components, each producing one or more benefits and advantages described in conjunction with the first mentioned aspects, and each having one or more embodiments corresponding to the embodiments described in conjunction with the first mentioned aspects and / or disclosed in the appended claims. Attached Figure Description

[0128] The above and other features and advantages of the present invention will become apparent to those skilled in the art from the following detailed description of exemplary embodiments thereof with reference to the accompanying drawings, wherein:

[0129] Figure 1 An exemplary hearing device is shown schematically;

[0130] Figure 2 An exemplary hearing device is shown schematically;

[0131] Figure 3 schematically illustrates an exemplary embodiment of a hearing device including an active matching device according to an embodiment of the present invention;

[0132] Figure 4 schematically illustrates an exemplary embodiment of a hearing device including an antenna according to an embodiment of the present invention;

[0133] Figure 5 An exemplary method for switching an active antenna in a hearing device is illustrated schematically.

[0134] List of reference numerals

[0135] 2 Hearing devices

[0136] 4. Signal Processor

[0137] 6 First wireless communication unit

[0138] 8 Second wireless communication unit

[0139] 10 antennas

[0140] 12 Active matching devices

[0141] 13 Control Signals

[0142] 14. Duplexer

[0143] 15 Grounding Potential

[0144] 16 First Matching Circuit

[0145] 18 Second Matching Circuit

[0146] 20 Primary Matching Circuit

[0147] 21 Switches

[0148] 22 Secondary matching circuit

[0149] 23 Inductors

[0150] 24 parts

[0151] 25 capacitors

[0152] 28 First End

[0153] 30, 30', 30” feed

[0154] 34 Second End

[0155] 40 transducers

[0156] 41 Midpoint

[0157] 42 receivers

[0158] The first part of the 44 antenna

[0159] The second part of the 46 antenna

[0160] The third part of the 48, 26, and 36 antennas

[0161] 101 Determine the operating mode of the hearing device

[0162] 102 In the first mode, the first wireless communication unit is connected to the antenna via an active matching device.

[0163] wire interconnection

[0164] 103 enables the antenna to transmit and receive electromagnetic radiation at the first frequency.

[0165] 104 In the second mode, the second wireless communication unit is connected to the antenna via an active matching device.

[0166] wire interconnect

[0167] 105. Adjust the antenna characteristics to enable the antenna to transmit and receive signals at a second frequency.

[0168] Magnetic radiation. Detailed Implementation

[0169] Various embodiments are described below with reference to the accompanying drawings. The same reference numerals consistently refer to the same elements. Therefore, in the description of each figure, similar elements will not be described in detail again. It should also be noted that the drawings are for convenience of describing the embodiments only. They are not intended as an exhaustive description of the claimed invention or as a limitation on the scope of the claimed invention. Furthermore, the illustrated embodiments do not need to have all the aspects or advantages shown. Aspects or advantages described in connection with a particular embodiment are not necessarily limited to that embodiment and may be practiced in any other embodiment, even if not so stated or explicitly described.

[0170] The same reference numerals are always used for the same or corresponding parts.

[0171] Figure 1 An exemplary hearing device 2 is schematically illustrated. The hearing device 2 includes a signal processor 4. The signal processor 4 is configured to determine an operating mode of the hearing device. This hearing device mode includes a first mode and a second mode. The hearing device 2 includes a first wireless communication unit 6 and a second wireless communication unit 8. The hearing device 2 includes an electrical antenna 10 for transmitting and receiving electromagnetic radiation. The antenna 10 is configured to resonate at a first frequency. The hearing device 2 includes an active matching device 12. The active matching device 12 is configured to interconnect the first wireless communication unit 6 and the second wireless communication unit 8 with the antenna 10. In the first mode, the active matching device 12 is configured to enable the antenna 10 to transmit and receive electromagnetic radiation at the first frequency. In the second mode, the active matching device 12 is configured to adjust the antenna characteristics of the antenna 10 so that the antenna 10 can transmit and receive electromagnetic radiation at a second frequency.

[0172] In some embodiments, the antenna characteristics of the antenna in the second mode are adjusted to obtain a resonant antenna at a second frequency or at a frequency within + / -20% of the second frequency.

[0173] In some embodiments, the active matching device 12 is configured to adjust one or more of the following antenna characteristics: antenna impedance, antenna electrical length, and radiation efficiency.

[0174] In some embodiments, adjustments to antenna characteristics alter the current distribution along the antenna and / or the antenna's frequency response.

[0175] Signal processor 4 is configured to provide control signal 13 to active matching device 12 in response to determination of hearing device mode. Control signal 13 may be a digital signal using logic or logic levels, such as binary numbers 1 and 0.

[0176] Antenna 10 can be a loop antenna, such as... Figure 1 As shown. The antenna is shown as including a feed 30 and connected to ground potential 15.

[0177] Figure 2 A block diagram of a hearing device 2 is shown. The hearing device 2 includes a transducer 40, i.e., a microphone, to generate one or more microphone output signals based on received audio signals. The one or more microphone output signals are provided to a signal processor 4 for processing. The hearing device 2 also includes a receiver 42, i.e., a speaker or amplifier. The receiver 42 is connected to the output of the signal processor 4 to convert the output of the signal processor 4 into a signal modified to compensate for the user's hearing impairment, and the signal processor 4 provides the modified signal to the receiver 42.

[0178] like Figure 2 As shown, the hearing device 2 also includes a first wireless communication unit 6 and a second wireless communication unit 8. The hearing device 2 includes an antenna 10 for transmitting and receiving electromagnetic radiation. The antenna 10 is configured to resonate at a first frequency. The hearing device 2 includes an active matching device 12. The active matching device 12 is configured to interconnect the first wireless communication unit 6 and the second wireless communication unit 8 with the antenna 10. The signal processor 4 is configured to determine an operating hearing device mode. This hearing device mode includes a first mode and a second mode. In the first mode, the active matching device 12 is configured to enable the antenna 10 to transmit and receive electromagnetic radiation at the first frequency. In the second mode, the active matching device 12 is configured to adjust the antenna characteristics of the antenna 10 so that the antenna 10 can transmit and receive electromagnetic radiation at a second frequency.

[0179] like Figure 2 As shown, the hearing device 2 may optionally further include a duplexer 14, which interconnects the first wireless communication unit 6 and the second wireless communication unit 8 with the active matching device 12. The duplexer 14 is configured to isolate or filter signals of the first frequency from signals of the second frequency.

[0180] Figures 3a to 3d An exemplary embodiment of a hearing device 2 including an active matching device 12 according to an embodiment of the present invention is illustrated schematically.

[0181] exist Figure 3a In this configuration, the active matching device 12 is connected to the antenna 10 and the first wireless communication unit 6. The hearing device 2 may also include a duplexer (not shown) that interconnects the first wireless communication unit 6 and the active matching device 12. The active matching device can be connected to the first wireless communication unit 6 via the duplexer (not shown).

[0182] exist Figure 3a In this configuration, the active matching device 12 includes a first matching circuit 16. The first matching circuit 16 is configured to match the impedance of the antenna 10 with that of the first wireless communication unit 6 in a first mode. Figure 3a In the first matching circuit 16, there is an inductor 23.

[0183] exist Figure 3b In this configuration, the active matching device 12 is connected to the antenna 10 and the second wireless communication unit 8. The hearing device 2 may also include a duplexer (not shown) that interconnects the second wireless communication unit 8 and the active matching device 12. The active matching device can be connected to the second wireless communication unit 8 via the duplexer (not shown).

[0184] exist Figure 3b In this configuration, the active matching device 12 includes a second matching circuit 18. The second matching circuit 18 includes a primary matching circuit 20 configured to match the impedance of the antenna 10 to the second wireless communication unit 8, and a secondary matching circuit 22 configured to adjust the antenna characteristics of the antenna 10 in a second mode to match a second frequency. Figure 3b In this circuit, the second matching circuit 18 includes an inductor 23 and a capacitor 25. Therefore, the primary matching circuit 20 includes an inductor 23, and the secondary matching circuit 22 includes a capacitor 25. The capacitor 25 is connected to ground potential 15.

[0185] like Figure 3c , 3d As shown in Figure 3e, the active matching device 12 includes a first matching circuit 16 and a second matching circuit 18. The active matching device 12 is connected to the antenna 10 and the duplexer 14. Optionally, the active matching device can be connected to first and second wireless communication units (not shown). The active matching device 12 can be configured to receive control signals (not shown) from a signal processor (not shown). Figure 1 Examples of active matching devices connected to first and second wireless communication units can be seen, as well as examples of active matching devices configured to receive control signals from a signal processor.

[0186] like Figure 3c , 3d As shown in Figure 3e, the first matching circuit 16 includes an inductor 23. The second matching circuit 18 includes an inductor 23 and a capacitor 25. The capacitor 25 is connected to ground potential 15.

[0187] exist Figure 3c , 3d In 3e, the active matching device 12 is shown as including two switches 21', 21'". Both switches 21', 21' are shown as "single-pole single-throw" (SPST) switches. The active matching device 12 is configured to switch between a first matching circuit 16 and a second matching circuit 18 according to a control signal. Therefore, the active matching device is configured to switch between the first matching circuit 16 when the hearing device is in a first mode and the second matching circuit 18 when the hearing device is in a second mode.

[0188] Figure 3c The active matching device 12 is shown when the hearing device is in the first operating mode. Figure 3cIt is shown that when switches 21' and 21" are open, current will flow in the first matching circuit 16. In the first mode of operation, the first matching circuit 16 is configured to match the impedance of the antenna 10 with that of the first wireless communication unit (not shown).

[0189] When switches 21' and 21" are open, current will also flow into the primary matching circuit 20 of the second matching circuit. Figure 3c It is shown that the current flowing in the first matching circuit 16 can be the same as the current flowing in the primary matching circuit 20 of the second matching circuit 18. Therefore, the first matching circuit 16 and the primary matching circuit 20 are identical matching circuits. The inductor 23 of the first matching circuit 16 is the same inductor 23 as that of the primary matching circuit 20.

[0190] Figure 3d The active matching device 12 is shown when the hearing device is in the second operating mode. Figure 3d It is shown that when switches 21' and 21" are closed, current flows in the primary matching circuit 20 and secondary matching circuit 22 of the second matching circuit 18. In the second mode of operation, the primary matching circuit 20 is configured to match the impedance of the antenna 10 with the second wireless communication unit (not shown), and the secondary matching circuit 22 is configured to adjust the antenna characteristics of the antenna 10 to match the second frequency. Figure 3c similar, Figure 3d The current flowing in the primary matching circuit 20 of the second matching circuit 18 can be the same as the current flowing in the first matching circuit 16. Therefore, the first matching circuit 16 and the primary matching circuit 20 are the same matching circuit.

[0191] exist Figure 3e In the diagram, switches 21' and 21" are shown in the open state. Optionally, switches 21' and 21" can also be closed. The first matching circuit 16 is shown including an inductor 23 and optional additional components 24, such as resistors, capacitors, diodes, or transistors. The secondary matching circuit 22 of the second matching circuit 18 is shown including a capacitor 25 and optional additional components 24. Therefore, Figure 3e Each of the first and second matching circuits shown includes one or more components selected from the group consisting of resistors, capacitors, inductors, diodes, and transistors.

[0192] Figure 4 schematically illustrates an exemplary hearing device 2, which includes an antenna 10, wireless communication units 6 and 8, and a ground plane 15. In a first mode of operation, the wireless communication unit may be a first wireless communication unit 6. In a second mode of operation, the wireless communication unit may be a second wireless communication unit 8. The hearing device may include an active matching device (not shown) configured to interconnect the first and second wireless communication units 6 and 8 with the antenna 10. The hearing device 2 may also include a duplexer (not shown) for interconnecting the first and second wireless communication units 6 and 8 with the active matching device. In the first mode of operation, the antenna 10 may be interconnected with the first wireless communication unit 6. In the second mode of operation, the antenna 10 may be interconnected with the second wireless communication unit 8. The antenna 10 may be connected to a ground potential 15.

[0193] Antenna 10 can be arranged in hearing device 2 such that at least a portion of antenna 10 extends from a first side of hearing device 2 to a second side of hearing device 2. The antenna may include one or more portions. These portions may be connected and form a loop, as shown in FIG. 4. A portion of the antenna, such as first portion 44, may be provided or arranged on the first side of hearing device 2. A portion of the antenna, such as second portion 46, may be provided or arranged on the second side of hearing device 2. A portion of the antenna (e.g., third portion 48) may connect to the first portion 44 and the second portion 46 of antenna 10. The third portion 48 may be disposed or arranged on the top of hearing device 2. The top of hearing device 2 may be a longitudinal top of hearing device 2. When hearing device 2 is worn in an operating position at the user's ear, the top of hearing device 2 may be substantially upward, for example, generally upward.

[0194] In some embodiments, the antenna in the first mode is configured to have an electrical length of + / -10% of the full wavelength corresponding to the first frequency.

[0195] In some embodiments, the antenna in the second mode is configured to have an electrical length of + / -10% of half the wavelength corresponding to the second frequency.

[0196] In some embodiments, the first frequency is higher than the second frequency. The second frequency is equal to or higher than half of the first frequency.

[0197] In some embodiments, the antenna 10 in the first mode is configured to have a maximum current, for example, a maximum current value, at the portion 26 of the antenna parallel to the user's interauricular axis when the hearing device 2 is worn in the operating position at the user's ear. In the first mode, when the hearing device 2 is worn in the operating position at the user's ear, the current distribution along the antenna 10 can be distributed such that the current provided along the antenna 10 can have a maximum value at the portion 26 of the antenna 10 parallel to the user's interauricular axis. As shown in FIG4, when the hearing device 2 is worn in the operating position at the user's ear, the portion 26 of the antenna 10 parallel to the user's interauricular axis can be the same portion of the antenna 10 as the third portion 48, and can be located on top of the hearing device 2.

[0198] Figure 4a , 4b Figures 4c and 4c schematically illustrate three examples of antenna construction. Figure 4a An exemplary antenna configuration of an exemplary hearing device 2 is schematically shown. Antenna 10 has a first end 28. The first end 28 is shown as being connected to wireless communication units 6, 8 via a transmission line. The first end 28 of antenna 10 is connected to a feed source 30 on a first side of the hearing device. Antenna 10 includes a second end 34. The second end 34 is shown as being connected to ground potential 15 via a transmission line. The antenna has a first electrical length. A portion 36 of the antenna extending from the first side of the hearing device to a second side of the hearing device is approximately half of the first electrical length.

[0199] like Figure 4a As shown, portion 36 of the antenna 10, which connects the first portion 44 and the second portion 46 of the antenna, is positioned approximately halfway down the first electrical length. Therefore, in the first mode of operation, the antenna can be configured to have the maximum current at approximately halfway down the first electrical length.

[0200] Figure 4b An example of the antenna configuration of an exemplary hearing device 2 is schematically shown. Antenna 10 includes a first end 28. The first end 28 is shown as being connected to wireless communication units 6, 8 via a transmission line. The first end 28 of antenna 10 is connected to a feed 30' on a first side of hearing device 2. Antenna 10 includes a second end 34. The second end 34 is shown as being connected to wireless communication units 6, 8. The second end 34 of antenna 10 is connected to a feed 30' on a second side of hearing device 2. The first feed 30' and the second feed 30' may be first and second connections to wireless communication units 6, 8. The second side of hearing device 2 is opposite to the first side of hearing device. The antenna has a first electrical length. The portion of antenna 36 extending from the first side of hearing device to the second side of hearing device may be approximately half of the first electrical length.

[0201] like Figure 4bAs shown, portion 36 of antenna 10 can be the same as third portion 48 of antenna 10, or it can be the same as portion 26 of antenna 10. Therefore, when the electrical length of antenna 10 corresponds to the full wavelength or approximately the full wavelength, the current will have a maximum value at third portion 36, which is approximately half the first electrical length, corresponding to approximately half a wavelength. For example, in a first operating mode, the antenna can be configured to have the maximum current at approximately half the first electrical length.

[0202] Figure 4c An example of the antenna configuration of an exemplary hearing device 2 is schematically shown. Antenna 10 includes a first end 28. The first end 28 is connected to a feed 30 on a second side of the hearing device 2. Antenna 10 includes a second end 34. The second end 34 of antenna 10 is connected to a feed 30" on the second side of the hearing device 2. Thus, two feeds 30', 30" are provided or arranged on the same side of the hearing device 2. Alternatively, the two feeds 30', 30" may be located on the first side of the hearing device 2. A portion of antenna 10 extends from the first side of the hearing device 2 to the second side of the hearing device 2. The second side of the hearing device 2 is opposite to the first side of the hearing device 2. Antenna 10 includes a first electrical length.

[0203] A portion of the antenna 36 extending from the first side of the hearing device to the second side of the hearing device may be approximately half the length of the first electrical length.

[0204] like Figure 4b As shown, portion 36 of antenna 10 can be the same as third portion 48 of antenna 10, or it can be the same as portion 26 of antenna 10. Therefore, when the electrical length of antenna 10 corresponds to or approximately corresponds to the full wavelength, the current will have its maximum value at third portion 36, approximately half the first electrical length, corresponding to about half a wavelength. For example, in a first mode of operation, the antenna can be configured to have the maximum current at approximately half the first electrical length.

[0205] The midpoint or center 41 of the first electrical length can be set on the third part 48 of the antenna, or it can be set such that the distance from the midpoint 41 to the third part 48 of the antenna 10 does not exceed one-quarter wavelength, λ / 4. The distance from the midpoint 41 of the antenna 10 to the third part 48 of the antenna is... Figure 4c The denoting element is L. The structure of antenna 10 can be designed as follows:

[0206]

[0207] The absolute relative difference between distance L and quarter wavelength λ / 4 is less than the threshold T, for example, less than 10% or 25%.

[0208] Figure 5A flowchart illustrating a method 100 for operating a hearing device is shown, and more specifically, a method for switching the active antenna in the hearing device is shown. The hearing device includes first and second wireless communication units. The hearing device includes an antenna for transmitting and receiving electromagnetic radiation. The antenna is configured to resonate at a first frequency. The hearing device includes an active matching device.

[0209] In step 101, the signal processor determines the hearing device mode of operation, which includes a first mode and a second mode.

[0210] In step 102, in the first mode, the first wireless communication unit is interconnected with the antenna via an active matching device.

[0211] In step 103, in the first mode, the antenna is capable of transmitting and receiving electromagnetic radiation at a first frequency.

[0212] In step 104, in the second mode, the second wireless communication unit is interconnected with the antenna via an active matching device.

[0213] In step 105, in the second mode, the antenna characteristics are adjusted so that the antenna can transmit and receive electromagnetic radiation at a second frequency.

[0214] Although specific features have been shown and described, it should be understood that they are not intended to limit the claimed invention, and it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the claimed invention. Therefore, the specification and drawings are to be considered illustrative rather than restrictive. The claimed invention is intended to cover all alternatives, modifications, and equivalents.

Claims

1. A hearing device, comprising: A signal processor configured to determine an operating hearing device mode, the hearing device mode including a first mode and a second mode; First wireless communication unit and second wireless communication unit; An electrical antenna for transmitting and receiving electromagnetic radiation, the antenna being configured to resonate at a first frequency; An active matching device configured to interconnect the first wireless communication unit and the second wireless communication unit with the antenna; In the first mode, the active matching device is configured to enable the antenna to transmit and receive electromagnetic radiation at a first frequency, and In the second mode, the active matching device is configured to adjust the antenna characteristics of the antenna so that the antenna can transmit and receive electromagnetic radiation at a second frequency. The first frequency is selected in the 2.4 GHz ISM band, and the second frequency is selected in the 1.6 GHz ISM band.

2. The hearing device according to claim 1, wherein, The active matching device is configured to adjust one or more of the following antenna characteristics: antenna impedance, antenna electrical length, and radiation efficiency.

3. The hearing device according to claim 1, wherein, The adjustment of the antenna characteristics alters the current distribution along the antenna and / or the frequency response of the antenna.

4. The hearing device of claim 1, further comprising a duplexer interconnecting the first wireless communication unit and the second wireless communication unit with the active matching device, the duplexer being configured to isolate the signal at the first frequency from the signal at the second frequency.

5. The hearing device according to claim 4, wherein, The active matching device includes a first matching circuit associated with a first wireless communication unit, the first matching circuit being configured to match the impedance of the antenna with that of the first wireless communication unit in the first mode.

6. The hearing device according to claim 5, wherein, The active matching device includes a second matching circuit associated with a second wireless communication unit, the second matching circuit having a primary matching circuit configured to match the impedance of the antenna with the second wireless communication unit, and a secondary matching circuit configured to adjust the antenna characteristics of the antenna in a second mode to match the second frequency.

7. The hearing device according to claim 6, wherein, The first matching circuit and the primary matching circuit are the same matching circuit.

8. The hearing device according to claim 7, wherein, Each of the first matching circuit and the second matching circuit includes one or more components selected from the group consisting of resistors, capacitors, inductors, diodes, and transistors.

9. The hearing device according to claim 6, wherein, The signal processor is configured to provide control signals to the active matching device in response to the determination of the hearing device mode.

10. The hearing device according to claim 9, wherein, The active matching device is configured to switch between the first matching circuit and the second matching circuit according to the control signal.

11. The hearing device according to claim 1, wherein, The first frequency is higher than the second frequency, and the second frequency is equal to or higher than half of the first frequency.

12. The hearing device according to claim 1, wherein, In the second mode, the antenna characteristics of the antenna are adjusted to obtain a resonant antenna at a second frequency or a frequency within + / -20% of the second frequency.

13. The hearing device according to claim 1, wherein, In the first mode, the antenna is configured such that when the hearing device is worn in the user's ear in an operating position, the portion of the antenna parallel to the user's interauricular axis has the maximum current.

14. The hearing device according to claim 1, wherein, The antenna has a first end connected to a feed source on a first side of the hearing device, and a second end connected to a ground potential on a second side of the hearing device, the second side being opposite to the first side; wherein the antenna has a first electrical length, and the portion of the antenna extending from the first side to the second side is half of the first electrical length.

15. A method of operating a hearing device, wherein the hearing device comprises: The signal processor, the first wireless communication unit and the second wireless communication unit, the antenna for transmitting and receiving electromagnetic radiation and configured to resonate at a first frequency, and the active matching device, The method includes the following steps: The signal processor determines the operating hearing device mode, which includes a first mode and a second mode. In the first mode: The first wireless communication unit is interconnected with the antenna via the active matching device, and This enables the antenna to transmit and receive electromagnetic radiation at a first frequency, and In the second mode: The second wireless communication unit is interconnected with the antenna via the active matching device, and Adjust the antenna characteristics so that the antenna can transmit and receive electromagnetic radiation at a second frequency; The first frequency is selected in the 2.4 GHz ISM band, and the second frequency is selected in the 1.6 GHz ISM band.

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