EP4284024A1 - Dispositif auditif comprenant un dispositif d'antenne à alimentations multiples - Google Patents

Dispositif auditif comprenant un dispositif d'antenne à alimentations multiples Download PDF

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Publication number
EP4284024A1
EP4284024A1 EP23172877.5A EP23172877A EP4284024A1 EP 4284024 A1 EP4284024 A1 EP 4284024A1 EP 23172877 A EP23172877 A EP 23172877A EP 4284024 A1 EP4284024 A1 EP 4284024A1
Authority
EP
European Patent Office
Prior art keywords
antenna
hearing aid
multifeed
antenna device
adaptation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23172877.5A
Other languages
German (de)
English (en)
Inventor
Wei Sun
Yew Seng Goh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sivantos Pte Ltd
Original Assignee
Sivantos Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sivantos Pte Ltd filed Critical Sivantos Pte Ltd
Publication of EP4284024A1 publication Critical patent/EP4284024A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/273—Adaptation for carrying or wearing by persons or animals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/609—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of circuitry
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/51—Aspects of antennas or their circuitry in or for hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/57—Aspects of electrical interconnection between hearing aid parts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07—Applications of wireless loudspeakers or wireless microphones

Definitions

  • the invention relates to a hearing aid having a multifeed antenna device with at least two antenna branches.
  • the invention further relates to a corresponding multifeed antenna device for a hearing aid.
  • Hearing aids are portable hearing aids that are used in particular to provide care for people who are hard of hearing or have hearing impairments.
  • different designs of hearing aids such as behind-the-ear hearing aids (BTE) and hearing aids with an external receiver (RIC: receiver in the canal) as well as in-the-ear hearing aids (ITE, ITE), for example also concha hearing aids or canal hearing aids (CIC: Completely-In-Channel, IIC: Invisible-In-The-Channel).
  • BTE behind-the-ear hearing aids
  • RIC receiver in the canal
  • ITE in-the-ear hearing aids
  • CIC concha hearing aids or canal hearing aids
  • the hearing aids listed as examples are worn on the outer ear or in the ear canal of a hearing aid user.
  • bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. The damaged hearing is stimulated either mechanically or electrically.
  • hearing aids have an input transducer, an amplifier and an output transducer as essential (hearing aid) components.
  • the input transducer is typically an acousto-electrical transducer, such as a microphone.
  • the output transducer is usually implemented as an electro-acoustic transducer, for example as a miniature loudspeaker (listener), or as an electromechanical transducer, such as a bone conduction receiver.
  • the amplifier is usually integrated into a signal processing device. The energy is usually supplied by a battery or a rechargeable accumulator.
  • Such hearing aids also have, for example, an electromagnetic receiver, for example an antenna device as an RF antenna, by means of which the hearing aid can be coupled in terms of signaling, for example with a control element (remote control) and/or with another hearing aid.
  • an electromagnetic receiver for example an antenna device as an RF antenna
  • the hearing aid can be coupled in terms of signaling, for example with a control element (remote control) and/or with another hearing aid.
  • the same antenna device is used for transmitting and receiving data.
  • Hearing aids are preferably designed to be particularly space-saving and compact, so that they can be worn as visually as inconspicuous as possible by a hearing aid user.
  • increasingly smaller hearing aids are being produced, which are increasingly more comfortable to wear and are therefore hardly noticeable by a user when worn on or in one ear.
  • due to the resulting reduced installation space it is increasingly difficult to accommodate and/or install conventional antenna elements for wireless signal transmission in such hearing aids.
  • Styletto hearing aids have a particularly small and slim form factor, which is also referred to as “SLIM-RIC” (Slim Receiver-In-Canal hearing aid).
  • SLIM-RIC Sud Receiver-In-Canal hearing aid
  • the available installation space above the battery is used, for example, to lay the HF antenna lines (HF: high frequency).
  • HF high frequency
  • one possibility is to design the (RF) antenna device in such a way that some of the electronic components or ASICs (application-specific integrated circuits) are moved into the installation space in which the antenna device is located.
  • antenna devices in BTE and (SLIM) RIC hearing aids are designed using printed circuit boards (PCBs).
  • PCBs printed circuit boards
  • the antenna devices are designed as MBGA (Mainboard Ground Antenna) or MBDA (Mainboard PCB Dedicated Antenna).
  • An MBGA antenna concept uses a motherboard circuit board as part of the antenna.
  • the circuit board or printed circuit board points here an (antenna) excitation slot, with additional inductances being required to decouple all the conductor tracks that run through the antenna excitation slot.
  • the antenna lines or antenna arms are arranged on a dedicated circuit board area, with a certain ground distance required in the antenna area.
  • Both MBGA and MBDA are antenna devices that are conventionally designed with a single antenna feed (singlefeed antenna devices).
  • an antenna feed or an antenna feed system is understood to mean in particular the cable or conductor and other associated devices that contain the transmitter or receiver or transceiver connect the antenna and make the two devices compatible.
  • the transceiver when sending signals, the transceiver generates an alternating current, which is fed into the antenna or the antenna arm by means of the antenna feed, which converts the power of the current into radio waves. Accordingly, the incoming radio waves stimulate tiny alternating currents in the antenna, with the feed system passing this current on to the transceiver, which processes the signal.
  • the antenna performance of MBGA and MBDA antenna concepts highly depends on the PCB design, such as a length of the PCB, an origami (folding, bending) of the PCB, or the location of antenna excitation/feeding. Both antenna concepts are still comparatively sensitive to the environment. For example, various mechanical materials (e.g. wires, battery, ...) surrounding the motherboard influence the transmission or reception power of such an antenna device.
  • the invention is based on the object of specifying a particularly suitable hearing aid.
  • a hearing aid with a particularly suitable antenna concept should be specified, which ensures reliable signal transmission even with a compact form factor.
  • the invention lies continues to be based on the task of specifying a particularly suitable multifeed antenna device.
  • the task is solved according to the invention with the features of claim 1 and with regard to the multifeed antenna device with the features of claim 6.
  • Advantageous refinements and further developments are the subject of the subclaims.
  • the advantages and refinements mentioned with regard to the hearing aid can also be applied to the multifeed antenna device and vice versa.
  • a multifeed antenna device (multi-feeds antenna device) is understood here and below to mean an antenna device with a number of antenna branches (antenna arms) and a corresponding number of antenna feeds or feed points.
  • the antenna device has at least two antenna branches and at least two assigned antenna feeds.
  • the hearing aid is preferably designed as a hearing aid device and is used in particular to provide care for a hearing-impaired user (hearing aid user).
  • the hearing aid is designed to record sound signals from the environment and output them to the hearing aid user.
  • the hearing aid has at least one input transducer, in particular an acousto-electrical transducer, such as a microphone.
  • the input transducer picks up sound signals (noises, tones, speech, etc.) from the environment and converts them into an electrical input signal.
  • the input signal is, for example, multi-channel. In other words, the acoustic signals are converted into a multi-channel input signal.
  • the input signal therefore preferably has a plurality of frequency channels, in particular at least two, preferably at least 20, particularly preferably at least 40, for example 48 (frequency) channels, each of which covers an assigned frequency band of a frequency range of the hearing aid.
  • a frequency range between 0 kHz and 24 kHz is divided into 48 channels, so that input signals with 48 channels are generated.
  • the hearing aid also has an output transducer, in particular an electro-acoustic transducer, such as a receiver.
  • An electrical (multi-channel) output signal is generated from the electrical (multi-channel) input signal by modifying the input signal, or the individual frequency or signal channels, in a signal processing device (e.g. amplified, filtered, attenuated).
  • the hearing aid is designed, for example, as a BTE hearing aid (BTE hearing aid) or ITE hearing aid (ITE hearing aid) or as a RIC hearing aid, in particular as a SLIM RIC hearing aid.
  • the hearing aid has a multifeed antenna device for wireless communication and/or signal connection with another hearing aid or an external operating and display device (for example smartphone).
  • the multifeed antenna device is preferably designed for a Bluetooth antenna frequency in the range between 2402 MHz (megahertz) and 2480 MHz.
  • the multifeed antenna device has an antenna or an antenna element with at least two antenna branches.
  • a line (conductor track), in particular a high frequency (HF) or radio frequency (RF) line, is connected to each antenna branch.
  • the antenna and RF line of the hearing aid are divided into at least two parts.
  • the lines are interconnected at a common connection point. In other words, the lines at the connection point are combined into one line.
  • This line is routed to a transceiver circuit via a filter and a first matching network.
  • the transceiver circuit also referred to below as a transceiver, is designed, for example, as an integrated circuit, in particular as an RFIC (radio frequency integrated circuit).
  • RFIC radio frequency integrated circuit
  • the first matching network is intended for matching or matching between the filter and the transceiver or RFIC and is suitable and set up for this purpose.
  • Each antenna branch is assigned a second adaptation network for phase shift.
  • the second adaptation networks are therefore intended and set up to effect a phase shift of a signal passing through, i.e. to change the phase of the signal when the signal runs through the respective second adaptation network.
  • the second adaptation networks form the feed points or antenna feeds for the respective antenna branch.
  • the second adaptation networks are in particular intended and set up to tune or set the phase shift and the S parameters, in particular the S11 parameter, of the antenna branches.
  • An S-parameter is to be understood in particular as meaning the input-output relationship between connections (or terminals) in an electrical system, with the S11 parameter indicating how much power is reflected by the antenna and is therefore also known as the reflection coefficient .
  • the S11 parameter is set by means of the second adaptation networks such that it is as low as possible at a given (antenna) frequency.
  • the second adaptation networks are used to adjust the phases of the two antenna branches and thus optimize the performance of the antenna device.
  • the second matching networks have, for example, inductors and capacitors.
  • the second matching networks For the phase shift, the second matching networks have, for example, a capacitance, an induction coil, a chipset, a diode, a balun and a micro strip as components or components.
  • the second adaptation networks Preferably have in particular inductors and capacitors, so that the adaptation and the phase shift take place simultaneously.
  • the antenna element or the antenna branches can be formed, for example, by a main board of the hearing aid, an FPC antenna (FPC: Flexible Printed Circuit), a metal stamping antenna, a chip antenna, a ceramic antenna, or the like.
  • FPC Flexible Printed Circuit
  • the multifeed antenna device is arranged on a circuit board arrangement.
  • the circuit board arrangement here comprises at least one circuit board (circuit board).
  • a mainboard circuit board of the hearing aid is used as a radiator or antenna for wireless communication or signal connection. This enables effective use of the main or mainboard circuit board of the hearing aid without affecting the performance of the multifeed antenna device. Furthermore, there is no additional assembly work to supply the multifeed antenna device, since the battery cell of the hearing aid should be connected to the circuit board anyway.
  • the circuit board arrangement has two antenna sections and a circuit section, the antenna sections forming the antenna branches, and the transceiver circuit and the filter as well as the first matching network on the circuit section are arranged.
  • the second matching networks are arranged, for example, on the circuit section or on the respective antenna sections.
  • the antenna sections are designed, for example, as an MBGA antenna concept.
  • the entire hearing aid mainboard circuit board is divided into three parts (two antenna sections and one circuit section).
  • the antenna element In a conventional antenna design, the antenna element is manufactured on a continuous metal, whereby the appropriate installation space must be provided for the antenna element when it is installed in the hearing aid. Due to limited installation space, the antenna performance is reduced. In a multiple feed antenna design, the antenna element is divided into two or three smaller antenna elements. This makes it flexible and can effectively use the limited space in the hearing aid. Compared to an ordinary antenna concept, the multifeed antenna device thus has improved RF antenna performance.
  • a feed point for the antenna branches is arranged between the circuit section and the antenna sections.
  • the antenna sections are arranged at a spatial distance from the circuit section.
  • the antenna sections and the circuit section are therefore designed in particular as separate individual circuit boards or printed circuit boards. This means that the installation space in the hearing aid can be used better or more easily.
  • the Fig. 1 shows a schematic and simplified representation of the basic structure of a portable hearing aid 2.
  • the hearing aid 2 is designed, for example, as a (SLIM-)RIC hearing aid device.
  • the hearing aid 2 includes, as in the Fig. 1 shown schematically, a device housing 4 with a slim or compact form factor.
  • One or more microphones also referred to as (acousto-electrical) input transducers 6, are installed in the device housing 4. With the input transducers 6, a sound or the acoustic signals are recorded in an environment of the hearing aid 2 and converted into electrical, multi-channel, input signals 8.
  • the input signals 8 preferably have several frequency channels, for example 48 channels in the frequency range between 0 kHz and 28 kHz.
  • a signal processing device 10 which is also integrated into the device housing 4, processes the input signals 8.
  • An output signal 12 of the signal processing unit 10 is transmitted to an output converter 14 external to the housing, which is designed, for example, as a loudspeaker or receiver, which outputs an acoustic signal.
  • the output transducer 14 is arranged, for example, in a dome or an otoplastic 16, which can be inserted into the ear canal of a hearing aid user.
  • the hearing aid 2 and in particular the signal processing device 10 are supplied with energy by means of a power supply which is also integrated into the device housing 4 Battery (battery cell) 18.
  • the device housing 4 has a charging interface 19 ( Fig. 3 ) to charge the battery 18.
  • the hearing aid 2 also has a multifeed antenna device 20, which is suitable and set up, for example, for wireless 2.4 GHz Bluetooth signal transmission in an ISM frequency band (.
  • a multifeed antenna device 20 for example, a wireless signal connection with an operating system (not shown in more detail) is possible. and display device, especially with a smartphone, can be implemented.
  • the multifeed antenna device 20 here has an antenna or an antenna element with at least two antenna branches 22a, 22b.
  • a line (conductor track) 24a, 24b is connected to each antenna branch 22a, 22b, which are interconnected to form a line 28 at a common connection point 26.
  • the line 28 is routed to a transceiver circuit 34 via a filter 30 and an adaptation network 32.
  • the transceiver circuit 34 is designed, for example, as an RFIC.
  • An adaptation network 36a, 36b for phase shifting is assigned to each antenna branch 22a, 22b.
  • the adaptation networks 36a, 36b are connected between the connection point 26 and the respective antenna branch 22a, 22b.
  • the adaptation networks 36a, 36b form the feed points or antenna feeds for the respective antenna branch 22a, 22b.
  • the matching networks 36a, 36b are used to adjust the phases of the two antenna branches 22a, 22b and to optimize the performance of the multifeed antenna device 20.
  • the adaptation networks 36a, 36b are intended and set up in particular to control the phase shift and the S parameters, in particular to tune or set the S11 parameter of the antenna branches 22a, 22b.
  • the Fig. 3 shows a perspective view of the hearing aid 2 with a transparent device housing 4.
  • the signal processing device 10 has a circuit board arrangement which surrounds the battery 18 within the device housing 4 in a compact installation space.
  • the signal processing device 10 here has a mainboard circuit board as a circuit board arrangement 38, on which the multifeed antenna device 20 is arranged.
  • the circuit board arrangement 38 has three spatially separate parts or sections 40, 42a, 42b.
  • the part of the circuit board arrangement 38 also referred to below as circuit section 40, has the filter 30 and the matching network 32 as well as the transceiver circuit 34.
  • the parts of the circuit board arrangement 38 also referred to below as antenna sections 42a, 42b, each form one of the antenna branches 22a, 22b according to an MBGA antenna concept.
  • the adaptation networks 36a, 36b are each arranged in the transition area between the circuit section 40 and the antenna sections 42a, 42b.
  • the hearing aid 2 is designed, for example, as a binaural hearing aid with two individual devices, with a second antenna device 44 in the device housings 4 for a signal connection between the individual devices, which is also referred to as ear-to-ear or ear-to-ear (e2e) communication is, is arranged.
  • the antenna device 44 is realized in particular as a magnetic-inductive antenna (MI antenna).
  • a particularly space-efficient antenna design is realized via the multi-part structure of the multifeed antenna device 20.
  • the antenna section 42a is in the area of Input converter 6 and the output converter 14 are arranged, with the antenna section 40 extending along the battery 18.
  • the antenna section 42b partially surrounds the battery 18 and the antenna device 44.
  • the antenna branch 22a or the antenna section 42a is not designed as an MGBA but as a further circuit board branch.
  • the statements of the Fig. 5 and Fig. 6 The only difference here is in the arrangement of the feed point or the arrangement of the adaptation network 36a.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transceivers (AREA)
  • Support Of Aerials (AREA)
EP23172877.5A 2022-05-25 2023-05-11 Dispositif auditif comprenant un dispositif d'antenne à alimentations multiples Pending EP4284024A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022205231.5A DE102022205231A1 (de) 2022-05-25 2022-05-25 Hörgerät mit einer Multifeed-Antennenvorrichtung

Publications (1)

Publication Number Publication Date
EP4284024A1 true EP4284024A1 (fr) 2023-11-29

Family

ID=86331791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23172877.5A Pending EP4284024A1 (fr) 2022-05-25 2023-05-11 Dispositif auditif comprenant un dispositif d'antenne à alimentations multiples

Country Status (4)

Country Link
US (1) US20230388726A1 (fr)
EP (1) EP4284024A1 (fr)
CN (1) CN117135553A (fr)
DE (1) DE102022205231A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150208180A1 (en) * 2014-01-22 2015-07-23 Siemens Aktiengesellschaft Dual antenna system and method for charging one or more hearing aids
US20190373381A1 (en) * 2018-06-05 2019-12-05 Starkey Laboratories, Inc. Ear-worn electronic device incorporating chip antenna loading of antenna structure
EP3726854A2 (fr) * 2019-03-29 2020-10-21 Sonova AG Dispositif d'aide auditive doté d'une antenne à boucle demi-cadre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005008063B4 (de) 2005-02-22 2008-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Antenne
EP2932559B1 (fr) 2012-12-12 2021-09-22 Sivantos Pte. Ltd. Antenne modulaire pour appareils d'aide auditive
US10735872B2 (en) 2018-08-09 2020-08-04 Starkey Laboratories, Inc. Hearing device incorporating phased array antenna arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150208180A1 (en) * 2014-01-22 2015-07-23 Siemens Aktiengesellschaft Dual antenna system and method for charging one or more hearing aids
US20190373381A1 (en) * 2018-06-05 2019-12-05 Starkey Laboratories, Inc. Ear-worn electronic device incorporating chip antenna loading of antenna structure
EP3726854A2 (fr) * 2019-03-29 2020-10-21 Sonova AG Dispositif d'aide auditive doté d'une antenne à boucle demi-cadre

Also Published As

Publication number Publication date
DE102022205231A1 (de) 2023-11-30
US20230388726A1 (en) 2023-11-30
CN117135553A (zh) 2023-11-28

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