CN110392332B - Hearing-aid compatible device, mobile terminal and method for realizing hearing-aid compatibility - Google Patents

Hearing-aid compatible device, mobile terminal and method for realizing hearing-aid compatibility Download PDF

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CN110392332B
CN110392332B CN201810367240.3A CN201810367240A CN110392332B CN 110392332 B CN110392332 B CN 110392332B CN 201810367240 A CN201810367240 A CN 201810367240A CN 110392332 B CN110392332 B CN 110392332B
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loop
inductance
parameter value
target parameter
coil
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CN110392332A (en
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孙家训
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ZTE Corp
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ZTE Corp
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    • 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
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • 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
    • H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility

Abstract

The embodiment of the invention discloses a hearing aid compatible device, which comprises an audio encoding and decoding device, a first inductance coil and a second inductance coil, wherein two ends of the first inductance coil and the second inductance coil are respectively connected with a positive output end and a negative output end of the audio encoding and decoding device to form a corresponding first inductance loop and a corresponding second inductance loop; the switching circuit is configured to switch a direction of current in the first inductive loop or the second inductive loop when the magnetic field directions of the first inductive coil and the second inductive coil are not the same. The embodiment of the invention also discloses a mobile terminal compatible with the hearing aid and a method for realizing the compatibility of the hearing aid by the mobile terminal.

Description

Hearing-aid compatible device, mobile terminal and method for realizing hearing-aid compatibility
Technical Field
The invention relates to the field of communication, in particular to a hearing aid compatible device, a hearing aid compatible mobile terminal and a method for realizing hearing aid compatibility of the mobile terminal.
Background
In order to enable a Hearing-impaired person to normally use a mobile phone to make a call by wearing a Hearing Aid, the mobile phone is required to have Hearing Aid Compatibility (HAC). Among them, the audio test (T-coil) in the HAC is used to evaluate the strength and signal-to-noise ratio of the audio magnetic field radiated by the wireless terminal device, and the T-coil is required to have a large magnetic field strength and a high signal-to-noise ratio so that the hearing aid can be coupled to a clear audio signal during a call.
Currently, relevant schemes for implementing the T-coil function of the HAC include: one solution is to integrate the T-coil in a receiver, which is called HAC receiver; the other scheme is to integrate the T-Coil in the HAC inductor, so that the T-Coil function of the HAC is realized through the matching of the HAC inductor Coil and a non-HAC receiver. In the first scheme, HAC receivers are more costly than non-HAC receivers, and if customized HAC receivers are used, the cost is higher. In the second scheme, the overall cost of the scheme adopting the HAC inductance coil and the non-HAC receiver is lower than that of the scheme adopting the HAC receiver, but because the inductance coil is also arranged in the non-HAC receiver, the inductance coil of the non-HAC receiver can radiate a magnetic field outwards when working, because of the influence of different directions of the inductance coil in the receivers of different models and the direction of the HAC inductance patch, the inductance coil of the non-HAC receiver can be mutually superposed with the magnetic field generated by the HAC inductance coil, or when the patch direction of the HAC inductance is not matched with the direction of the inductance coil of the non-HAC receiver, the magnetic field generated by the HAC inductance coil and the magnetic field generated by the receiver inductance coil can be reversely offset, and at this time, the T-coil index can be seriously deteriorated. And whether the direction of the patch of the HAC inductor is matched with the direction of the inductance coil of the non-HAC receiver or not can not be detected in a production line, so that the HAC cannot meet the requirement easily.
Disclosure of Invention
In order to solve the existing technical problems, embodiments of the present invention provide a hearing aid compatible device and a mobile terminal capable of automatically enhancing the T-coil performance of the HAC, and a method for implementing hearing aid compatibility.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a hearing aid compatible device, including an audio codec device, a first inductor winding and a second inductor winding, where two ends of the first inductor winding and the second inductor winding are respectively connected to a positive output end and a negative output end of the audio codec device to form a corresponding first inductor loop and a corresponding second inductor loop, where: the first inductance loop comprises a switching circuit connected between the first inductance coil and the audio coding and decoding device, or the second inductance loop comprises a switching circuit connected between the second inductance coil and the audio coding and decoding device; the switching circuit is configured to switch a direction of current in the first inductive loop or the second inductive loop when the magnetic field directions of the first inductive coil and the second inductive coil are not the same.
In the foregoing solution, the switching circuit includes a switch unit, and the switch unit includes a first operating state and a second operating state, where the first operating state is set to connect the first end of the first inductor winding with the positive output end of the audio codec device and connect the second end of the first inductor winding with the negative output end of the audio codec device, or the first operating state is set to connect the first end of the second inductor winding with the positive output end of the audio codec device and connect the second end of the second inductor winding with the negative output end of the audio codec device; the second working state is set to connect the first end of the first inductance coil with the negative output end of the audio coding and decoding device and connect the second end of the first inductance coil with the positive output end of the audio coding and decoding device, or the second working state is set to connect the first end of the second inductance coil with the negative output end of the audio coding and decoding device and connect the second end of the second inductance coil with the positive output end of the audio coding and decoding device; the switch unit switches the direction of the current in the first inductance loop or the second inductance loop by switching between the first working state and the second working state.
In the above solution, the switching circuit further includes a magnetic field detection unit, the switching circuit is connected to the first inductance loop, and the magnetic field detection unit detects a first target parameter value in the first inductance loop when the switching unit is in the first operating state and a second target parameter value in the first inductance loop when the switching unit is in the second operating state, respectively; when the first target parameter value and the second target parameter value meet a set condition, the magnetic field directions of the first inductance coil and the second inductance coil are different;
or, the switching circuit is connected to the second inductive loop, and the magnetic field detection unit detects a first target parameter value in the second inductive loop when the switching unit is in the first operating state and a second target parameter value in the second inductive loop when the switching unit is in the second operating state, respectively; and when the first target parameter value and the second target parameter value meet a set condition, the magnetic field directions of the first inductance coil and the second inductance coil are different.
In the above solution, the switch unit includes a first switch and a second switch, the switch circuit is connected to the first inductor loop, when the first switch and the second switch are set to the first working state, the first end of the first inductor coil is connected to the positive output end of the audio codec device, the second end of the first inductor coil is connected to the negative output end of the audio codec device, when the first switch and the second switch are set to the second working state, the first end of the first inductor coil is connected to the negative output end of the audio codec device, and the second end of the first inductor coil is connected to the positive output end of the audio codec device;
or, the switching circuit is connected to the second inductor loop, and when the first switch and the second switch are set to the first working state, the first end of the second inductor loop is connected to the positive output end of the audio codec device, and the second end of the second inductor loop is connected to the negative output end of the audio codec device; when the first change-over switch and the second change-over switch are set to the second working state, the first end of the second inductance coil is connected with the negative output end of the audio coding and decoding device, and the second end of the second inductance coil is connected with the positive output end of the audio coding and decoding device.
In the above solution, the magnetic field detection unit includes a processor, the switching circuit is connected to the first inductance loop, the processor is configured to control the switching unit to switch between the first working state and the second working state, and to record a first target parameter value in the first inductance loop when the switching unit is in the first working state and a second target parameter value in the first inductance loop when the switching unit is in the second working state, respectively, and control the switching unit to switch the current working state when it is determined that the magnetic field directions of the first inductance coil and the second inductance coil are different according to the first target parameter value and the second target parameter value;
or, the switching circuit is connected to the second inductor loop, the processor is configured to control the switching unit to switch between the first operating state and the second operating state, and to record a first target parameter value in the second inductor loop when the switching unit is in the first operating state and a second target parameter value in the second inductor loop when the switching unit is in the second operating state, respectively, and control the switching unit to switch the current operating state when it is determined that the magnetic field directions of the first inductor coil and the second inductor coil are different according to the first target parameter value and the second target parameter value.
In the above scheme, the first inductance coil is a hearing aid compatible inductance coil, and the second inductance coil is a receiver inductance coil.
In the above scheme, the first inductance coil and the second inductance coil are arranged back to back.
In a second aspect, embodiments of the present invention provide a hearing aid compatible mobile terminal comprising a hearing aid compatible device according to the first aspect.
In a third aspect, an embodiment of the present invention provides a method for realizing hearing aid compatibility of a mobile terminal, where the mobile terminal includes an audio codec device, a first inductor winding and a second inductor winding, two ends of the first inductor winding and the second inductor winding are respectively connected to a positive output end and a negative output end of the audio codec device to form a corresponding first inductor loop and a corresponding second inductor loop, and the method includes:
acquiring a first target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a first direction and a second target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a second direction opposite to the first direction;
if the first target parameter value and the second target parameter value meet a set condition, switching the direction of the current in the first inductance loop;
or, acquiring a first target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a first direction and a second target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction;
and if the first target parameter value and the second target parameter value meet a set condition, switching the direction of the current in the second inductance loop.
In the above scheme, the method further comprises:
judging whether a command for starting a compatible mode of the hearing aid is received;
if so, executing the step of obtaining a first target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a first direction and a second target parameter value in the first inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction, or executing the step of obtaining a first target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in the first direction and a second target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction.
The hearing aid compatible device provided in the above embodiment includes an audio encoding and decoding device, a first inductance coil and a second inductance coil, where two ends of the first inductance coil and the second inductance coil are respectively connected with a positive output end and a negative output end of the audio encoding and decoding device to form a corresponding first inductance loop and a corresponding second inductance loop, where the first inductance loop includes a switching circuit connected between the first inductance coil and the audio encoding and decoding device, or the second inductance loop includes a switching circuit connected between the second inductance coil and the audio encoding and decoding device; the switching circuit is configured to switch a direction of current in the first inductive loop or the second inductive loop when the magnetic field directions of the first inductive coil and the second inductive coil are not the same. Therefore, the magnetic field directions of the first inductance coil and the second inductance coil are the same, so that the magnetic induction intensity at the position of the hearing aid is increased after the magnetic fields in the same directions are mutually superposed on the hearing aid, the signal to noise ratio is improved, the audio signal coupled by the inductance coil on the hearing aid is clearer, and the audio test performance of the compatibility of the hearing aid is automatically enhanced.
Drawings
Fig. 1 is a schematic diagram of a hearing aid compatible device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the directions of magnetic fields when the directions of currents flowing through the first inductor winding and the second inductor winding are the same and opposite to each other according to an embodiment of the present invention;
fig. 3 is a logic diagram of the switch unit in the first operating state and the second operating state respectively according to an embodiment of the present invention;
fig. 4 is a flow chart illustrating a method for implementing hearing aid compatibility of a mobile terminal according to an embodiment of the present invention;
fig. 5 is a flow chart illustrating a method for implementing hearing aid compatibility of a mobile terminal according to another embodiment of the present invention;
fig. 6 is a schematic diagram of a hearing aid compatible device according to another embodiment of the present invention;
fig. 7 is a schematic flow chart of implementing hearing aid compatibility by a hearing aid compatible mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further elaborated by combining the drawings and the specific embodiments in the specification. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Before further detailed description of the present invention, terms and expressions referred to in the embodiments of the present invention are described, and the terms and expressions referred to in the embodiments of the present invention are applicable to the following explanations.
1) The principle of inductance means that when current passes through a coil, an induced electromagnetic field is generated around the coil, and the induced electromagnetic field generates induced current in the coil to counteract the current passing through the coil.
2) The mutual inductance principle means that when a current in one coil changes, an induced electromotive force is generated in the adjacent other coil.
3) Lenz's law, means that the induced current has a direction such that the magnetic field of the induced current always blocks the change in the magnetic flux causing the induced current.
Referring to fig. 1, a hearing aid compatible device provided for an embodiment of the present invention includes an audio codec device 10, a first inductor winding 11 and a second inductor winding 12, where two ends of the first inductor winding 11 are respectively connected to a positive output end and a negative output end of the audio codec device 10 to form a corresponding first inductor loop, two ends of the second inductor winding 12 are respectively connected to a positive output end and a negative output end of the audio codec device 10 to form a second inductor loop, the first inductor loop further includes a switching circuit 13 connected between the first inductor winding 11 and the audio codec device 10, and the switching circuit 13 is configured to switch a direction of a current in the first inductor loop when directions of magnetic fields of the first inductor winding 11 and the second inductor winding 12 are different.
It should be noted that the first inductor winding 11 may include one or more turns, and the second inductor winding 12 may also include one or more turns. The distance between the first inductor winding 11 and the second inductor winding 12 should generally satisfy the following condition: the first inductor winding 11 is within the range of the induced electromagnetic field generated around the second inductor winding 12, while the second inductor winding 12 is within the range of the induced electromagnetic field generated around the first inductor winding 11. The audio signal output by the audio codec device 10 is an alternating current signal, i.e. a varying electrical signal.
When the audio signal output by the audio codec device 10 flows through the first inductor winding 11 through the first inductor loop, it can be known from the inductance principle that an induced electromagnetic field is generated around the first inductor winding 11, so that the audio signal can be converted into electromagnetic waves to be radiated in the air, and the inductor winding on the hearing aid acquires the audio signal by coupling the electromagnetic waves. Similarly, when the audio signal output by the audio codec device 10 flows through the second inductor 12 through the second inductor loop, an induced electromagnetic field is also generated around the second inductor 12, so that the audio signal can also be converted into an electromagnetic wave to be radiated into the air, so that the inductor on the hearing aid acquires the audio signal by coupling the electromagnetic wave. However, when the directions of the induced electromagnetic field generated around the first inductor winding 11 and the induced electromagnetic field generated around the second inductor winding 12 are different, the magnetic induction intensity is reduced and the signal-to-noise ratio is reduced after the magnetic fields with different directions are superimposed on the hearing aid, so that the audio signal coupled to the inductor winding on the hearing aid is unclear, that is, the audio test performance of the hearing aid compatibility is reduced. Only when the directions of the induced electromagnetic field generated around the first inductor winding 11 and the induced electromagnetic field generated around the second inductor winding 12 are the same, the magnetic induction intensity is increased and the signal-to-noise ratio is improved after the magnetic fields with the same directions are superposed on the hearing aid, so that the audio signal coupled to the inductor winding on the hearing aid is clearer, namely the audio test performance of the hearing aid compatibility is enhanced.
The following describes the influence of the same and opposite directions of the currents flowing through the first inductor winding 11 and the second inductor winding 12 on the audio testing performance of hearing aid compatibility. Referring to fig. 2, (a) in fig. 2 is a schematic diagram of a magnetic field direction when the current flowing through the first inductor coil 11 and the second inductor coil 12 are in the same direction, and when the current flowing through the first inductor coil 11 is in the same direction as the current flowing through the second inductor coil 12, the magnetic field direction e of the induced electromagnetic field generated around the first inductor coil 11 is the same as the magnetic field direction f of the induced electromagnetic field generated around the second inductor coil 12. At this time, compared with the effect of the induced electromagnetic field generated around the first inductor winding 11 or the induced electromagnetic field generated around the second inductor winding 12 at the hearing aid, after the induced electromagnetic field generated around the first inductor winding 11 and the induced electromagnetic field generated around the second inductor winding 12 with the same magnetic field direction are mutually superposed on the hearing aid, the corresponding magnetic induction intensity at the hearing aid is increased, and the signal-to-noise ratio is improved, so that the audio signal coupled to the inductor winding on the hearing aid is clearer, that is, the audio test performance of the hearing aid compatibility is enhanced.
Fig. 2 (b) is a schematic diagram of magnetic field directions when the directions of currents flowing through the first inductor winding 11 and the second inductor winding 12 are opposite, and when the directions of currents flowing through the first inductor winding 11 and the second inductor winding 12 are opposite, the magnetic field direction e of the induced electromagnetic field generated around the first inductor winding 11 is opposite to the magnetic field direction f of the induced electromagnetic field generated around the second inductor winding 12. At this time, compared with the effect of the induced electromagnetic field generated around the first inductor winding 11 or the induced electromagnetic field generated around the second inductor winding 12 on the hearing aid, after the induced electromagnetic field generated around the first inductor winding 11 and the induced electromagnetic field generated around the second inductor winding 12 with opposite magnetic field directions are mutually superposed on the hearing aid, the corresponding magnetic induction intensity at the hearing aid is reduced, and the signal-to-noise ratio is reduced, so that the audio signal coupled to the inductor winding on the hearing aid is unclear, that is, the audio test performance of the hearing aid compatibility is reduced.
It is understood that the switching circuit 13 may also be disposed in the second inductance loop to connect between the first inductance coil 11 and the audio codec device 10. Correspondingly, the switching circuit 13 is configured to switch the direction of the current in the second inductor loop when the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are different.
In summary, in the hearing aid compatible device provided in the above embodiment, when the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are different, the switching circuit 13 switches the direction of the current in the first inductor winding so that the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are the same, so that the magnetic induction intensity at the hearing aid is increased after the magnetic fields in the same direction are mutually superimposed on the hearing aid, and the signal-to-noise ratio is improved, so that the audio signal coupled to the inductor winding on the hearing aid is clearer, and thus, the audio test performance of the hearing aid compatibility is automatically enhanced. In addition, when the patch direction of the HAC inductor is wrong, the problem of reverse cancellation of the magnetic field generated by the HAC inductor and the magnetic field generated by the receiver inductor can be avoided by automatically switching the direction of the current flowing through the HAC inductor or the receiver inductor.
In an alternative embodiment, referring to fig. 1 again, the switching circuit 13 includes a switch unit 131, and the switch unit 131 includes a first operating state and a second operating state, where the first operating state is configured to connect the first end of the first inductor 11 to the positive output terminal of the audio codec device 10, and connect the second end of the first inductor 11 to the negative output terminal of the audio codec device 10; the second operating state is configured to connect the first end of the first inductor winding 11 to the negative output end of the audio codec device 10, connect the second end of the first inductor winding 11 to the positive output end of the audio codec device 10, and switch the switch unit 131 between the first operating state and the second operating state to switch the direction of the current in the first inductor loop.
Here, when the switch unit 131 is in the first operating state, the first end and the second end of the first inductance coil 11 are respectively connected to the positive output end and the negative output end of the audio codec device 10, when the switch unit 131 is in the second working state, the first end and the second end of the first inductance coil 11 are respectively connected to the negative output end and the positive output end of the audio codec device 10, therefore, the audio signal flowing through the first inductor 11 when the switch unit 131 is in the first operating state is opposite to the audio signal flowing through the first inductor 11 when the switch unit 131 is in the second operating state, that is, the direction of the current in the first inductive loop when the switch unit 131 is in the first operating state is opposite to the direction of the current flowing through the first inductive loop when the switch unit 131 is in the second operating state. Accordingly, since the direction of the induced electromagnetic field generated around the first inductor winding 11 can be changed after the direction of the current in the first inductor loop is switched, the switch unit 131 can make the directions of the magnetic fields of the first inductor winding 11 and the second inductor winding 12 the same by switching between the first operating state and the second operating state.
It is understood that the switch unit 131 may also be disposed in the second inductive loop, and if the switch unit 131 is disposed in the second inductive loop, the first operating state is set to connect the first end of the second inductive coil 12 to the positive output end of the audio codec device 10, and connect the second end of the second inductive coil 12 to the negative output end of the audio codec device 10; the second operating state is configured to connect the first end of the second inductor 12 to the negative output end of the audio codec device 10, and connect the second end of the second inductor 12 to the positive output end of the audio codec device 10. Accordingly, the switch unit 131 switches the direction of the current in the second inductive loop by switching between the first operating state and the second operating state.
By switching the switching unit 131 between the first operating state and the second operating state, the direction of the current in the first inductor loop is switched, so that the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are ensured to be the same, and the audio test performance of hearing aid compatibility is automatically enhanced. Therefore, the control is simple, and the processing speed is high.
In an alternative embodiment, please refer to fig. 3, wherein In _1 may be a positive output terminal of the audio codec device 10, In _2 may be a negative output terminal of the audio codec device 10, Out _1 may be a first terminal of the first inductor 11, and Out _2 may be a second terminal of the first inductor 11. The switch unit 131 includes a first switch 1310 and a second switch 1311, and when the first switch 1310 and the second switch 1311 are set to the first working state, as shown In (c) In fig. 3, the first end Out _1 of the first inductor 11 is connected to the positive output terminal In _1 of the audio codec device 10, and the second end Out _2 of the first inductor 11 is connected to the negative output terminal In _2 of the audio codec device 10, respectively; when the first switch 1310 and the second switch 1311 are set to the second operating state, as shown In fig. 3 (d), the first end Out _1 of the first inductor 11 is connected to the negative output end In _2 of the audio codec device 10, and the second end Out _2 of the first inductor 11 is connected to the positive output end In _1 of the audio codec device 10, respectively.
It is understood that the switch unit 131 including the first switch 1310 and the second switch 1311 may also be disposed in the second inductive loop, and if the switch unit 131 including the first switch 1310 and the second switch 1311 is disposed in the second inductive loop, the first switch 1310 and the second switch 1311 are set to the first working state, respectively connect the first end of the second inductor 12 with the positive output end of the audio codec device 10, and connect the second end of the second inductor 12 with the negative output end of the audio codec device 10; when the first switch and the second switch are set to the second working state, the first end of the second inductance coil 12 is connected to the negative output end of the audio codec device 10, and the second end of the second inductance coil 12 is connected to the positive output end of the audio codec device 10.
By switching the working states of the first switch and the second switch, the direction of the current in the first inductance loop is switched, so that the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 are ensured to be the same, and the audio test performance of hearing aid compatibility is automatically enhanced. Therefore, the control is simple, and the cost is low.
In an optional embodiment, referring to fig. 1 again, the switching circuit 13 further includes a magnetic field detection unit 132, where the magnetic field detection unit 132 detects a first target parameter value in the first inductance loop when the switch unit 131 is in the first working state and a second target parameter value in the first inductance loop when the switch unit is in the second working state, respectively, and when a setting condition is satisfied between the first target parameter value and the second target parameter value, the magnetic field directions of the first inductance coil and the second inductance coil are different.
Specifically, the magnetic field detection unit 132 sequentially detects a first target parameter value in the first inductance loop when the switch unit 131 is in the first operating state, and detects a second target parameter value in the first inductance loop when the switch unit 131 is in the second operating state, and when a setting condition is satisfied between the first target parameter value and the second target parameter value, it indicates that the magnetic field directions of the first inductance coil and the second inductance coil are different, and it is necessary to switch the direction of the current in the first inductance loop; when the first target parameter value and the second target parameter value do not meet the setting condition, it is indicated that the magnetic field directions of the first inductance coil and the second inductance coil are the same at present, and the direction of the current in the first inductance loop does not need to be switched.
Or, the magnetic field detection unit 132 sequentially detects a first target parameter value in the second inductance loop when the switch unit 131 is in the first operating state, and detects a second target parameter value in the second inductance loop when the switch unit 131 is in the second operating state, and when a setting condition is satisfied between the first target parameter value and the second target parameter value, it indicates that the magnetic field directions of the first inductance coil and the second inductance coil are different, and it is necessary to switch the direction of the current in the first inductance loop; when the first target parameter value and the second target parameter value do not meet the setting condition, it is indicated that the magnetic field directions of the first inductance coil and the second inductance coil are the same at present, and the direction of the current in the first inductance loop does not need to be switched.
It is understood that the first target parameter value and the second target parameter value may be used to characterize the magnetic field direction of the first inductor winding and the second inductor winding, and the first target parameter value and the second target parameter value may be both the current and the magnetic field strength. Because, the current in the first inductance loop and the second inductance loop is smaller when the magnetic field directions of the first inductance coil and the second inductance coil are the same than when the magnetic field directions of the first inductance coil and the second inductance coil are different. In addition, the magnetic field strength at the first inductor winding in the first inductor loop and the magnetic field strength at the second inductor winding in the second inductor loop are greater when the magnetic field directions of the first inductor winding and the second inductor winding are the same than when the magnetic field directions of the first inductor winding and the second inductor winding are different.
Referring to fig. 2 again, taking the first target parameter value and the second target parameter value as currents as an example, when the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 are the same or different, the magnitudes of the currents in the first inductance loop and the second inductance loop are analyzed, specifically as follows:
when the directions of the audio signal flowing through the first inductor winding 11 and the audio signal flowing through the second inductor winding 12 are different, it can be known from the mutual inductance principle and lenz's law that the induced electromagnetic field generated around the second inductor winding 12 generates induced current in the first inductor winding 11 in the same direction as the audio signal flowing through the first inductor winding 11, so that the current in the first inductor winding increases, and the current in the first inductor winding at this time is denoted as I1(ii) a At the same time, the induced electromagnetic field generated around the first inductor 11 is induced in the second inductor12, an induced current is also generated in the second inductor 12 in the same direction as the audio signal flowing through the second inductor 12, so that the current in the second inductor loop is also increased, and the magnitude of the current in the second inductor loop at this time is denoted as I2。
When the audio signal flowing through the first inductor coil 11 and the audio signal flowing through the second inductor coil 12 are in the same direction, it can be known from the mutual inductance principle and lenz's law that the induced electromagnetic field generated around the second inductor coil 12 generates an induced current in the first inductor coil 11 in a direction opposite to the direction of the audio signal flowing through the first inductor coil 11, so that the current in the first inductor loop decreases, and the magnitude of the current in the first inductor loop at this time is denoted as I3(ii) a Meanwhile, the induced electromagnetic field generated around the first inductor 11 also generates induced current in the second inductor 12 in a direction opposite to the direction of the audio signal flowing through the second inductor 12, so that the current in the second inductor loop is also reduced, and the current in the second inductor loop at this time is denoted as I4。
In summary, I1Is greater than I3That is, when the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are the same, the current in the first inductor loop is smaller than when the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are different; at the same time, I2Is greater than I4That is, when the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are the same, the current in the second inductor loop is also smaller than that when the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are different. Therefore, according to the corresponding magnitude relationship between the currents in the first inductance loop or the second inductance loop when the switch unit 131 is in the first working state and the second working state, the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 when the switch unit 131 is in the first working state and the first inductance line when the switch unit 131 is in the second working state can be determinedThe magnetic field directions of the coil 11 and the second inductor coil 12, and thus determine whether the switch unit 131 should be switched to the first operating state or the second operating state, so that the magnetic field directions of the first inductor coil 11 and the second inductor coil 12 are the same.
As can be seen from the above, if the magnetic field detection unit 132 detects that the current value in the first inductance loop is smaller when the switch unit 131 is in the first operating state and the current value in the first inductance loop when the switch unit 131 is in the second operating state, it indicates that the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 are the same when the switch unit 131 is in the first operating state; if the magnetic field detection unit 132 detects that the current value in the first inductance loop is greater than the current value in the first inductance loop when the switch unit 131 is in the first working state and the current value in the first inductance loop when the switch unit 131 is in the second working state, it indicates that the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 are different when the switch unit 131 is in the second working state. In addition, if the magnetic field detection unit 132 detects that the current value in the second inductance loop is smaller when the switch unit 131 is in the first operating state and the current value in the second inductance loop when the switch unit 131 is in the second operating state, it indicates that the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 are the same when the switch unit 131 is in the first operating state; if the magnetic field detection unit 132 detects that the current value in the second inductance loop is greater than the current value in the second inductance loop when the switch unit 131 is in the first working state and the current value in the second inductance loop when the switch unit 131 is in the second working state, it indicates that the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 are different when the switch unit 131 is in the second working state.
When the switching unit 131 is in the first working state and the second working state, the first target parameter value and the second target parameter value in the first inductance loop are detected respectively, so as to obtain which working state the switching unit 131 is in when the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 are different, and which working state the switching unit 131 is in when the magnetic field directions of the first inductance coil 11 and the second inductance coil 12 are the same, thereby facilitating to determine which working state the switching unit 131 should be switched to. Therefore, the detection process is simple, and the practicability is good.
In an optional embodiment, the magnetic field detection unit 132 includes a processor, and the processor is configured to control the switching unit 131 to switch between the first operating state and the second operating state, and record a first target parameter value in the first inductance loop when the switching unit 131 is in the first operating state and a second target parameter value in the first inductance loop when the switching unit 131 is in the second operating state, respectively, and control the switching unit to switch the current operating state when it is determined that the magnetic field directions of the first inductance coil and the second inductance coil are different according to the first target parameter value and the second target parameter value.
Taking the target parameter value as an example of a current value, the processor first controls the switch unit 131 in the first working state, records a current value in the first inductance loop, then switches the switch unit 131 in the second working state, records a current value in the first inductance loop, and if the current value in the first inductance loop is smaller in the first working state of the switch unit 131 and the current value in the first inductance loop in the second working state of the switch unit 131 indicate that the magnetic field directions of the first inductance coil and the second inductance coil are different in the second working state of the switch unit 131, controls the switch unit 131 to switch to the first working state; if the current value in the first inductance loop is greater when the switch unit 131 is in the first working state and the current value in the first inductance loop is greater when the switch unit 131 is in the second working state, which indicates that the magnetic field directions of the first inductance coil and the second inductance coil are the same when the switch unit 131 is in the second working state, the switch unit 131 is controlled to be kept in the second working state.
It should be understood that the magnetic field detection unit 132 including a processor may also be disposed in the second inductance loop, if the magnetic field detection unit 132 including a processor is disposed in the second inductance loop, the processor controls the switch unit 131 to switch between the first working state and the second working state, and records a first target parameter value in the second inductance loop when the switch unit 131 is in the first working state and a second target parameter value in the second inductance loop when the switch unit 131 is in the second working state, respectively, and controls the switch unit to switch the current working state when it is determined that the magnetic field directions of the first inductance coil and the second inductance coil are different according to the first target parameter value and the second target parameter value.
The switching unit 131 is controlled by the processor to switch between the first working state and the second working state, a first target parameter value in the first inductance loop when the switching unit 131 is in the first working state and a second target parameter value in the first inductance loop when the switching unit 131 is in the second working state are respectively recorded, and when it is determined that the magnetic field directions of the first inductance coil and the second inductance coil are different according to the first target parameter value and the second target parameter value, the switching unit 131 is controlled to switch the current working state, so that the magnetic field directions of the first inductance coil and the second inductance coil are the same, and the audio test performance of hearing aid compatibility is automatically enhanced. Therefore, the processing speed is high, and the stability is good.
In an optional embodiment, the first inductor coil is a hearing aid compatible inductor coil, and the second inductor coil is a receiver inductor coil.
Specifically, when the hearing aid compatible device is applied to mobile terminals such as mobile phones and tablet computers, the first inductance coil is a hearing aid compatible inductance coil, and the second inductance coil is a receiver inductance coil. The T-coil function of the HAC is realized on the mobile terminal through the combination of the hearing aid compatibility inductance coil and the receiver inductance coil, so that the manufacturing cost of the mobile terminal can be reduced.
In an alternative embodiment, the first inductor winding 11 and the second inductor winding 12 are disposed back to back.
It can be understood that, when the first inductor winding 11 and the second inductor winding 12 are disposed back to back, they are easily affected by the magnetic field generated by the other, and if the magnetic field directions of the first inductor winding 11 and the second inductor winding 12 are the same, it is easiest to enhance the audio test performance of hearing aid compatibility, so that the hearing aid can be coupled to a clear audio signal during a call, and in addition, the layout space of the hearing aid compatible device can be effectively improved.
Based on the same inventive concept as the previous embodiments, embodiments of the present invention provide a hearing aid compatible mobile terminal comprising a hearing aid compatible device as provided in any of the embodiments of the present application. Specifically, the hearing aid compatible device comprises an audio encoding and decoding device, a first inductance coil and a second inductance coil, wherein two ends of the first inductance coil and the second inductance coil are respectively connected with a positive output end and a negative output end of the audio encoding and decoding device to form a corresponding first inductance loop and a corresponding second inductance loop, the first inductance loop comprises a switching circuit connected between the first inductance coil and the audio encoding and decoding device, or the second inductance loop comprises a switching circuit connected between the second inductance coil and the audio encoding and decoding device; the switching circuit is configured to switch a direction of current in the first inductive loop or the second inductive loop when the magnetic field directions of the first inductive coil and the second inductive coil are not the same.
In summary, in the hearing aid compatible mobile terminal provided in the above embodiment, when the magnetic field directions of the first inductor winding and the second inductor winding are different, the switching circuit switches the direction of the current in the first inductor winding, so that the magnetic field directions of the first inductor winding and the second inductor winding are the same, and the magnetic field directions in the same direction are overlapped with each other on the hearing aid, thereby increasing the magnetic induction intensity and increasing the signal-to-noise ratio, so that the audio signal coupled to the inductor winding on the hearing aid is clearer, and thus, the audio test performance of the hearing aid compatibility is automatically enhanced.
In an optional embodiment, the switching circuit includes a switching unit, the switching unit includes a first operating state and a second operating state, the first operating state is configured to connect the first end of the first inductor winding with the positive output terminal of the audio codec device and connect the second end of the first inductor winding with the negative output terminal of the audio codec device, or the first operating state is configured to connect the first end of the second inductor winding with the positive output terminal of the audio codec device and connect the second end of the second inductor winding with the negative output terminal of the audio codec device; the second working state is set to connect the first end of the first inductance coil with the negative output end of the audio coding and decoding device and connect the second end of the first inductance coil with the positive output end of the audio coding and decoding device, or the second working state is set to connect the first end of the second inductance coil with the negative output end of the audio coding and decoding device and connect the second end of the second inductance coil with the positive output end of the audio coding and decoding device; the switch unit switches the direction of the current in the first inductance loop or the second inductance loop by switching between the first working state and the second working state.
The switching unit is switched between the first working state and the second working state to switch the direction of current in the first inductance loop or the second inductance loop, so that the magnetic field directions of the first inductance coil and the second inductance coil are ensured to be the same, and the audio test performance of hearing aid compatibility is automatically enhanced. Therefore, the control is simple, and the processing speed is high.
In an optional embodiment, the switching circuit further includes a magnetic field detection unit, the switching circuit is connected to the first inductive loop, and the magnetic field detection unit detects a first target parameter value in the first inductive loop when the switching unit is in the first operating state and a second target parameter value in the first inductive loop when the switching unit is in the second operating state, respectively; when the first target parameter value and the second target parameter value meet a set condition, the magnetic field directions of the first inductance coil and the second inductance coil are different;
or, the switching circuit is connected to the second inductor loop, the magnetic field detection unit detects a first target parameter value in the second inductor loop when the switch unit is in the first operating state and a second target parameter value in the second inductor loop when the switch unit is in the second operating state, respectively, and when a set condition is satisfied between the first target parameter value and the second target parameter value, the magnetic field directions of the first inductor coil and the second inductor coil are different.
When the switch unit is in the first working state, the target parameter value in the first inductance loop and the target parameter value in the second inductance loop are detected respectively, so that the working state of the switch unit when the magnetic field directions of the first inductance coil and the second inductance coil are different and the working state of the switch unit when the magnetic field directions of the first inductance coil and the second inductance coil are the same are obtained, and therefore the working state of the switch unit to which the switch unit should be switched is convenient to determine. Therefore, the detection process is simple, and the practicability is good.
In an optional embodiment, the switch unit includes a first switch and a second switch, the switch circuit is connected to the first inductor loop, and the first switch and the second switch are set to the first operating state, so as to connect the first end of the first inductor coil to the positive output end of the audio codec device and connect the second end of the first inductor coil to the negative output end of the audio codec device; when the first change-over switch and the second change-over switch are set to the second working state, the first end of the first inductance coil is connected with the negative output end of the audio coding and decoding device, and the second end of the first inductance coil is connected with the positive output end of the audio coding and decoding device; or, the switching circuit is connected to the second inductor loop, and when the first switch and the second switch are set to the first working state, the first end of the second inductor loop is connected to the positive output end of the audio codec device, and the second end of the second inductor loop is connected to the negative output end of the audio codec device; when the first change-over switch and the second change-over switch are set to the second working state, the first end of the second inductance coil is connected with the negative output end of the audio coding and decoding device, and the second end of the second inductance coil is connected with the positive output end of the audio coding and decoding device.
The direction of current in the first inductance loop or the second inductance loop is switched by switching the working state of the first change-over switch and the second change-over switch, so that the magnetic field directions of the first inductance coil and the second inductance coil are ensured to be the same, and the audio test performance of hearing aid compatibility is automatically enhanced. Therefore, the control is simple, and the cost is low.
In an optional embodiment, the first inductor coil is a hearing aid compatible inductor coil, and the second inductor coil is a receiver inductor coil.
Thus, the T-coil function of the HAC is realized on the mobile terminal by combining the hearing aid compatible inductor coil and the receiver inductor coil, and the manufacturing cost of the mobile terminal can be reduced.
In an optional embodiment, the magnetic field detection unit includes a processor, the switching circuit is connected to the first inductance loop, the processor is configured to control the switching unit to switch between the first operating state and the second operating state, and record a first target parameter value in the first inductance loop when the switching unit is in the first operating state and a second target parameter value in the first inductance loop when the switching unit is in the second operating state, respectively, and control the switching unit to switch the current operating state when it is determined that the magnetic field directions of the first inductance coil and the second inductance coil are different according to the first target parameter value and the second target parameter value; or, the switching circuit is connected to the second inductor loop, the processor is configured to control the switching unit to switch between the first operating state and the second operating state, and to record a first target parameter value in the second inductor loop when the switching unit is in the first operating state and a second target parameter value in the second inductor loop when the switching unit is in the second operating state, respectively, and control the switching unit to switch the current operating state when it is determined that the magnetic field directions of the first inductor coil and the second inductor coil are different according to the first target parameter value and the second target parameter value.
And controlling the switch unit to switch between the first working state and the second working state through a processor, respectively recording a first target parameter value and a second target parameter value in the corresponding first inductance loop or second inductance loop, and controlling the switch unit to switch the current working state when determining that the magnetic field directions of the first inductance coil and the second inductance coil are different according to the first target parameter value and the second target parameter value, so that the magnetic field directions of the first inductance coil and the second inductance coil are the same, and the audio test performance of the compatibility of the hearing aid is automatically enhanced. Therefore, the processing speed is high, and the stability is good.
In an optional embodiment, the first inductor winding and the second inductor winding are arranged back to back.
Thus, the audio test performance of hearing aid compatibility can be enhanced, and in addition, the layout space of the mobile terminal can be effectively improved.
Referring to fig. 4, a method for realizing hearing aid compatibility for a mobile terminal provided in an embodiment of the present invention includes an audio codec device, a first inductor winding and a second inductor winding, where two ends of the first inductor winding and the second inductor winding are respectively connected to a positive output end and a negative output end of the audio codec device to form a corresponding first inductor loop and a corresponding second inductor loop, where the method includes:
s101: acquiring a first target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a first direction and a second target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a second direction opposite to the first direction;
specifically, when the direction of the current in the first inductance loop is in a first direction, the mobile terminal obtains a first target parameter value in the first inductance loop, and then switches the direction of the current in the first inductance loop to a second direction opposite to the first direction to obtain a second target parameter value in the first inductance loop.
It can be understood that, the mobile terminal may also obtain a first target parameter value in the second inductive loop when the direction of the current in the first inductive loop is in a first direction, and then switch the direction of the current in the first inductive loop to a second direction opposite to the first direction to obtain a second target parameter value in the second inductive loop.
Here, the first target parameter value and the second target parameter value may be used to characterize the magnetic field directions of the first inductor winding and the second inductor winding, and the first target parameter value and the second target parameter value may be both current and magnetic field strength. In addition, the direction of the current in the first inductance loop can be changed by changing the connection relationship between the two ends of the first inductance coil and the positive output end and the negative output end of the audio encoding and decoding device respectively. For example, if the first end of the first inductor winding is connected to the positive output end of the audio codec device, and the second end of the first inductor winding is connected to the negative output end of the audio codec device, the direction of the current in the first inductor winding is the first direction, then the first end of the first inductor winding is connected to the negative output end of the audio codec device, and the direction of the current in the first inductor winding is the second direction when the second end of the first inductor winding is connected to the positive output end of the audio codec device.
In practical application, when the mobile terminal obtains a first target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a first direction, a second target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a second direction opposite to the first direction, and the direction of the current in the first inductance loop can be switched through a switching circuit arranged in the mobile terminal, wherein the switching circuit comprises a switch unit and a magnetic field detection unit, when the switch unit is in a first working state, a first end of the first inductance coil is connected with a positive output end of the audio encoding and decoding device, a second end of the first inductance coil is connected with a negative output end of the audio encoding and decoding device, and at the moment, the magnetic field detection unit obtains the first target parameter value; when the switch unit is in a second working state, the first end of the first inductance coil is connected with the negative output end of the audio coding and decoding device, the second end of the first inductance coil is connected with the positive output end of the audio coding and decoding device, and at the moment, the magnetic field detection unit obtains the second target parameter value. In this way, the switching unit switches the direction of the current in the first inductive loop by switching between the first operating state and the second operating state, and the magnetic field detection unit obtains the corresponding first target parameter value and the second target parameter value. It should be noted that the switch unit may include a first switch and a second switch, and the magnetic field detection unit may include a processor. In addition, when the mobile terminal is a communication device such as a mobile phone and a tablet personal computer, the first inductance coil is a hearing aid compatible inductance coil, the second inductance coil is a receiver inductance coil, and the first inductance coil and the second inductance coil are arranged back to back.
S102: and if the first target parameter value and the second target parameter value meet a set condition, switching the direction of the current in the first inductance loop.
Specifically, since the current in the first inductance loop and the current in the second inductance loop are smaller than the current in the first inductance loop and the second inductance loop when the magnetic field directions of the first inductance loop and the second inductance loop are the same and the magnetic field directions of the first inductance loop and the second inductance loop are different, when the current in the first inductance loop is in the first direction and the second direction opposite to the first direction, if the first target parameter value in the first inductance loop is smaller than the second target parameter value or the first target parameter value in the second inductance loop is smaller than the second target parameter value, it is described that the magnetic field directions of the first inductance loop and the second inductance loop are different when the current in the first inductance loop is in the second direction, that is, the setting condition is satisfied between the first target parameter value and the second target parameter value, the direction of the current in the first inductive loop needs to be switched to the first direction.
In addition, whether the direction of the current in the first inductance loop or the second inductance loop needs to be switched or not can be judged according to the magnetic field intensity. Because, the magnetic field strength at the first inductance coil in the first inductance loop and the magnetic field strength at the second inductance coil in the second inductance loop are larger when the magnetic field directions of the first inductance coil and the second inductance coil are the same than when the magnetic field directions of the first inductance coil and the second inductance coil are different.
In summary, in the method for realizing hearing aid compatibility of the mobile terminal provided in the above embodiment, when the obtained direction of the current in the first inductance loop is in a first direction and a second direction opposite to the first direction, respectively, and the first target parameter value and the second target parameter value in the first inductance loop are determined according to the first target parameter value and the second target parameter value that the directions of the magnetic fields of the first inductance coil and the second inductance coil are different, the direction of the current in the first inductance loop is switched in time, so that the directions of the magnetic fields of the first inductance coil and the second inductance coil are the same, so that the magnetic induction intensity at the hearing aid is increased after the magnetic fields in the same direction are mutually superimposed on the hearing aid, the signal-to-noise ratio is improved, and the audio signal coupled to the inductance coil on the hearing aid is clearer, so that, the audio test performance of hearing aid compatibility is automatically enhanced.
In an optional embodiment, the method further comprises:
judging whether a command for starting a compatible mode of the hearing aid is received;
if yes, executing S101: and acquiring a first target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a first direction and a second target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a second direction opposite to the first direction.
Specifically, the mobile terminal determines whether a hearing aid compatible mode turning-on instruction is received, if the hearing aid compatible mode turning-on instruction is received, the step of obtaining a first target parameter value in the first inductive loop when the direction of the current in the first inductive loop is in a first direction and a second target parameter value in the first inductive loop when the direction of the current in the first inductive loop is in a second direction opposite to the first direction is executed, and if the hearing aid compatible mode turning-on instruction is not received, the step of obtaining the first target parameter value in the first inductive loop when the direction of the current in the first inductive loop is in the first direction and the step of obtaining the second target parameter value in the first inductive loop when the direction of the current in the first inductive loop is in the second direction opposite to the first direction are executed until the hearing aid compatible mode turning-on instruction is received.
Here, the mobile terminal receiving the instruction to turn on the hearing aid compatible mode may refer to the mobile terminal receiving an instruction to turn on a hearing aid communication mode, which may be understood as an instruction to communicate with the hearing aid. Taking the mobile terminal as a mobile phone and taking the hearing aid switch virtual key in the call setting of the mobile phone as an example, when the user needs to call with the aid of the hearing aid, the mobile phone receives an instruction for starting the hearing aid call mode after the user clicks the hearing aid switch virtual key in the mobile phone, so as to execute S101.
The mobile terminal obtains the first target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in the first direction and the second target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in the second direction opposite to the first direction only after receiving the instruction of starting the hearing aid compatible mode, so that the processing resource of the mobile terminal can be effectively saved, and the electric quantity utilization rate is improved.
Referring to fig. 5, a method for realizing hearing aid compatibility for another mobile terminal provided in the embodiment of the present invention includes an audio codec device, a first inductor winding and a second inductor winding, where two ends of the first inductor winding and the second inductor winding are respectively connected to a positive output end and a negative output end of the audio codec device to form a corresponding first inductor loop and a corresponding second inductor loop, where the method includes:
s201: acquiring a first target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a first direction and a second target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction;
specifically, when the direction of the current in the second inductance loop is obtained in the first direction, the mobile terminal obtains a first target parameter value in the second inductance loop, and then switches the direction of the current in the second inductance loop to a second direction opposite to the first direction to obtain a second target parameter value in the second inductance loop.
It can be understood that, the mobile terminal may also obtain a first target parameter value in the first inductive loop when the direction of the current in the second inductive loop is in a first direction, and then switch the direction of the current in the second inductive loop to a second direction opposite to the first direction to obtain a second target parameter value in the first inductive loop.
Here, the first target parameter value and the second target parameter value may be used to characterize the magnetic field directions of the first inductor winding and the second inductor winding, and the first target parameter value and the second target parameter value may be both current and magnetic field strength. In addition, the direction of the current in the second inductance loop can be changed by changing the connection relationship between the two ends of the second inductance coil and the positive output end and the negative output end of the audio encoding and decoding device respectively. For example, if the direction of the current in the second inductor loop is the first direction when the first end of the second inductor loop is connected to the positive output end of the audio codec device and the second end of the second inductor loop is connected to the negative output end of the audio codec device, the direction of the current in the second inductor loop is the second direction when the first end of the second inductor loop is connected to the negative output end of the audio codec device and the second end of the second inductor loop is connected to the positive output end of the audio codec device.
In practical application, when the mobile terminal obtains a first target parameter value in the first inductance loop when the direction of the current in the second inductance loop is in a first direction, a second target parameter value in the first inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction, and the direction of the current in the second inductance loop can be switched through a switching circuit arranged in the mobile terminal, wherein the switching circuit comprises a switch unit and a magnetic field detection unit, when the switch unit is in a first working state, a first end of the second inductance coil is connected with a positive output end of the audio encoding and decoding device, a second end of the second inductance coil is connected with a negative output end of the audio encoding and decoding device, and at the moment, the magnetic field detection unit obtains the first target parameter value; when the switch unit is in a second working state, the first end of the second inductance coil is connected with the negative output end of the audio coding and decoding device, the second end of the second inductance coil is connected with the positive output end of the audio coding and decoding device, and at the moment, the magnetic field detection unit obtains the second target parameter value. In this way, the switching unit switches the direction of the current in the second inductive loop by switching between the first operating state and the second operating state, and the magnetic field detection unit obtains the corresponding first target parameter value and the second target parameter value. It should be noted that the switch unit may include a first switch and a second switch, and the magnetic field detection unit may include a processor. In addition, when the mobile terminal is a communication device such as a mobile phone and a tablet personal computer, the first inductance coil is a hearing aid compatible inductance coil, the second inductance coil is a receiver inductance coil, and the first inductance coil and the second inductance coil are arranged back to back.
S202: and if the first target parameter value and the second target parameter value meet a set condition, switching the direction of the current in the second inductance loop.
Specifically, since the current in the first inductance loop and the second inductance loop is smaller than the current in the first inductance loop and the second inductance loop when the magnetic field directions of the first inductance loop and the second inductance loop are the same and the magnetic field directions of the first inductance loop and the second inductance loop are different, when the current in the second inductance loop are in the first direction and the second direction opposite to the first direction, respectively, if the first target parameter value in the second inductance loop is smaller than the second target parameter value or the first target parameter value in the first inductance loop is smaller than the second target parameter value, it is described that the magnetic field directions of the first inductance loop and the second inductance loop are different when the current in the second inductance loop is in the second direction, that is, the setting condition is satisfied between the first target parameter value and the second target parameter value, the direction of the current in the second inductive loop needs to be switched to the first direction.
In addition, whether the direction of the current in the second inductance loop needs to be switched or not can be judged according to the magnetic field intensity. Because, the magnetic field strength at the first inductance coil in the first inductance loop and the magnetic field strength at the second inductance coil in the second inductance loop are larger when the magnetic field directions of the first inductance coil and the second inductance coil are the same than when the magnetic field directions of the first inductance coil and the second inductance coil are different.
In summary, in the method for realizing hearing aid compatibility of the mobile terminal provided in the above embodiment, when the direction of the current in the second inductor loop is in the first direction and the second target parameter value in the second inductor loop is in the second direction opposite to the first direction, and it is determined according to the first target parameter value and the second target parameter value that the directions of the magnetic fields of the first inductor coil and the second inductor coil are different, the directions of the current in the second inductor loop are switched in time, so that the directions of the magnetic fields of the first inductor coil and the second inductor coil are the same, so that the magnetic induction intensity at the hearing aid is increased after the magnetic fields in the same direction are superimposed on the hearing aid, and the signal-to-noise ratio is improved, so that the audio signal coupled to the inductor coil on the hearing aid is clearer, in this way, the audio test performance of hearing aid compatibility is automatically enhanced.
In an optional embodiment, the method further comprises:
judging whether a command for starting a compatible mode of the hearing aid is received;
if yes, executing S201: and acquiring a first target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a first direction and a second target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction.
Specifically, the mobile terminal determines whether a hearing aid compatible mode turning-on instruction is received, if the hearing aid compatible mode turning-on instruction is received, the step of obtaining a first target parameter value in the second inductive loop when the direction of the current in the second inductive loop is in a first direction and a second target parameter value in the second inductive loop when the direction of the current in the second inductive loop is in a second direction opposite to the first direction is executed, and if the hearing aid compatible mode turning-on instruction is not received, the step of obtaining the first target parameter value in the second inductive loop when the direction of the current in the second inductive loop is in the first direction and the second target parameter value in the second inductive loop when the direction of the current in the second inductive loop is in the second direction opposite to the first direction is executed until the hearing aid compatible mode turning-on instruction is received.
Here, the mobile terminal receiving the instruction to turn on the hearing aid compatible mode may refer to the mobile terminal receiving an instruction to turn on a hearing aid communication mode, which may be understood as an instruction to communicate with the hearing aid. Taking the mobile terminal as a mobile phone and taking the hearing aid switch virtual key in the call setting of the mobile phone as an example, when the user needs to call with the aid of the hearing aid, the mobile phone receives an instruction for starting the hearing aid call mode after the user clicks the hearing aid switch virtual key in the mobile phone, so as to execute S201.
The mobile terminal obtains the first target parameter value in the first inductance loop when the direction of the current in the second inductance loop is in the first direction and the second target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in the second direction opposite to the first direction only after receiving the instruction for starting the hearing aid compatible mode, so that the processing resource of the mobile terminal can be effectively saved, and the electric quantity utilization rate is improved.
In the following, an embodiment of the present invention is further described in detail by using a specific example, referring to fig. 6, which is a schematic structural diagram of a hearing aid compatible mobile terminal provided in this embodiment, in this example, a mobile phone is taken as the hearing aid compatible mobile terminal, an audio codec device 10 is taken as an audio codec 10, a first inductance coil 11 is taken as an HAC inductance coil 11, a second inductance coil 12 is taken as a receiver inductance coil 12, a switching circuit 13 includes a controllable switch module 131, a monitoring module 132, a processor 133, and a switch unit 131 is taken as an example. The HAC inductor 11 and the receiver inductor 12 are arranged back-to-back. The controllable switch module 131 is respectively connected to two ends of the HAC inductance coil 11 and the monitoring module 132, and the monitoring module 132 is respectively connected to the EAR _ P end and the EAR _ N end of the audio codec 10 and the controllable switch module 131, so that two ends of the HAC inductance coil 11 are respectively connected to the EAR _ P end and the EAR _ N end of the audio codec 10 to form a first inductance loop. Two ends of the receiver inductance coil 12 are respectively connected with the EAR _ P end and the EAR _ N end of the audio codec 10, so as to form a second inductance loop, and the receiver inductance coil 12 is connected in parallel with the HAC inductance coil 11. In addition, the processor 133 is connected to the monitoring module 132 and the controllable switch module 131 respectively to receive the signal transmitted by the monitoring module 132 and control the controllable switch module 131 to switch states.
Referring to fig. 3 again, In _1 is used as the EAR _ P terminal of the audio codec device 10, In _2 is used as the EAR _ N terminal of the audio codec device 10, Out _1 is used as the first terminal of the HAC inductor 11, and Out _2 is used as the second terminal of the HAC inductor 11. When the controllable switch module 131 works In the first working state, as shown In (c) of fig. 3, at this time, In _1 is correspondingly connected to Out _1, In _2 is correspondingly connected to Out _2, that is, the EAR _ P end of the audio codec device 10 is connected to the first end of the HAC inductor 11, and the EAR _ N end of the audio codec device 10 is connected to the second end of the HAC inductor 11; when the controllable switch module 131 receives the switching instruction from the processor 133, the controllable switch module 131 switches from the first operating state to the second operating state, as shown IN (d) of fig. 3, at this time, IN _1 is correspondingly connected to OUT _2, IN _2 is correspondingly connected to OUT _1, that is, the EAR _ P terminal of the audio codec device 10 is connected to the second terminal of the HAC inductor 11, and the EAR _ N terminal of the audio codec device 10 is connected to the first terminal of the HAC inductor 11, which is equivalent to switching the direction of the current flowing through the HAC inductor 11.
Referring to fig. 7, a specific workflow for implementing hearing aid compatibility for the hearing aid compatible mobile terminal includes the following steps:
s301: starting a hearing aid communication mode after a user clicks a hearing aid function switch in the communication setting;
here, when the user clicks the hearing aid function switch in the call setup in the mobile phone, the mobile phone will start the hearing aid call mode, and the hearing aid function switch may indicate that the user needs to call with the aid of the hearing aid.
S302: the EAR _ P end and the EAR _ N end of the audio codec play a stable ultrasonic wave with the frequency of more than 20 KHz;
s303: the controllable switch module operates IN a default state, i.e. IN _1 corresponds to OUT _1, IN _2 corresponds to OUT _2,at the moment, the monitoring module monitors and records the current value i on the first inductance loop1；
S304: the processor switches the state of the controllable switch module to enable IN _1 to correspond to OUT _2 and IN _2 to correspond to OUT _1, and at the moment, the monitoring module monitors and records the current value i on the first inductance loop again2；
S305: processor judges i1Whether or not it is greater than i2If yes, executing S306, otherwise executing S307;
here, the monitoring module records the current value i1And i2And transmitting the data to the processor for judgment operation of the processor.
S306: the processor keeps the state of the controllable switch module as IN _1 corresponding to OUT _2 and IN _2 corresponding to OUT _ 1;
here, when i1Greater than i2IN the following description, when IN _1 corresponds to OUT _2 and IN _2 corresponds to OUT _1, the magnetic field directions of the receiver inductor 12 and the HAC inductor 11 are the same, and therefore, it is necessary to maintain the states of the controllable switch modules as IN _1 corresponds to OUT _2 and IN _2 corresponds to OUT _ 1.
S307: the state of the controllable switch module switched by the processor is that IN _1 corresponds to OUT _1, and IN _2 corresponds to OUT _ 2;
here, when i1Is less than i2When it is described that IN _1 corresponds to OUT _2 and IN _2 corresponds to OUT _1, the magnetic field directions of the receiver inductive coil 12 and the HAC inductive coil 11 are different, so that the state of the controllable switch module needs to be switched to IN _1 corresponding to OUT _1 and IN _2 corresponding to OUT _2, so that the magnetic field directions of the receiver inductive coil 12 and the HAC inductive coil 11 are the same.
After the hearing aid compatible mobile terminal completes the current hearing aid compatible process, the next time the user starts the hearing aid function switch is waited for, and the next intelligent monitoring and switching process is carried out.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. The scope of the invention is to be determined by the scope of the appended claims.

Claims (9)

1. A compatible device of hearing aid comprises an audio encoding and decoding device, a first inductance coil and a second inductance coil, wherein two ends of the first inductance coil and two ends of the second inductance coil are respectively connected with a positive output end and a negative output end of the audio encoding and decoding device to form a corresponding first inductance loop and a corresponding second inductance loop, and the compatible device is characterized in that: the first inductance loop comprises a switching circuit connected between the first inductance coil and the audio coding and decoding device, or the second inductance loop comprises a switching circuit connected between the second inductance coil and the audio coding and decoding device; the switching circuit is configured to switch a direction of current in the first inductive loop or the second inductive loop when the magnetic field directions of the first inductive coil and the second inductive coil are not the same;
the switching circuit comprises a switching unit and a magnetic field detection unit, wherein the switching unit comprises a first working state and a second working state; the switching circuit is connected with the first inductance loop, and the magnetic field detection unit respectively detects a first target parameter value in the first inductance loop when the switch unit is in the first working state and a second target parameter value in the first inductance loop when the switch unit is in the second working state; when the first target parameter value and the second target parameter value meet a set condition, the magnetic field directions of the first inductance coil and the second inductance coil are different;
or, the switching circuit is connected to the second inductive loop, and the magnetic field detection unit detects a first target parameter value in the second inductive loop when the switching unit is in the first operating state and a second target parameter value in the second inductive loop when the switching unit is in the second operating state, respectively; and when the first target parameter value and the second target parameter value meet a set condition, the magnetic field directions of the first inductance coil and the second inductance coil are different.
2. A hearing aid compatible device according to claim 1, wherein the first operating state is arranged to connect the first terminal of the first inductor winding to the positive output terminal of the audio codec and the second terminal of the first inductor winding to the negative output terminal of the audio codec, or the first operating state is arranged to connect the first terminal of the second inductor winding to the positive output terminal of the audio codec and the second terminal of the second inductor winding to the negative output terminal of the audio codec; the second working state is set to connect the first end of the first inductance coil with the negative output end of the audio coding and decoding device and connect the second end of the first inductance coil with the positive output end of the audio coding and decoding device, or the second working state is set to connect the first end of the second inductance coil with the negative output end of the audio coding and decoding device and connect the second end of the second inductance coil with the positive output end of the audio coding and decoding device; the switch unit switches the direction of the current in the first inductance loop or the second inductance loop by switching between the first working state and the second working state.
3. The hearing aid compatible device according to claim 2, wherein the switching unit comprises a first switch and a second switch, the switching circuit being connected to the first inductive loop, the first switch and the second switch being arranged to connect the first end of the first inductor winding to the positive output terminal of the audio codec device and the second end of the first inductor winding to the negative output terminal of the audio codec device in the first operational state, the first switch and the second switch being arranged to connect the first end of the first inductor winding to the negative output terminal of the audio codec device and the second end of the first inductor winding to the positive output terminal of the audio codec device in the second operational state;
or, the switching circuit is connected to the second inductor loop, and when the first switch and the second switch are set to the first working state, the first end of the second inductor loop is connected to the positive output end of the audio codec device, and the second end of the second inductor loop is connected to the negative output end of the audio codec device; when the first change-over switch and the second change-over switch are set to the second working state, the first end of the second inductance coil is connected with the negative output end of the audio coding and decoding device, and the second end of the second inductance coil is connected with the positive output end of the audio coding and decoding device.
4. The hearing aid compatible device according to claim 1, wherein the magnetic field detection unit comprises a processor, the switching circuit is connected to the first inductive loop, the processor is configured to control the switching unit to switch between the first operating state and the second operating state, and to record a first target parameter value in the first inductive loop when the switching unit is in the first operating state and a second target parameter value in the first inductive loop when the switching unit is in the second operating state, respectively, and to control the switching unit to switch to the current operating state when it is determined that the magnetic field directions of the first inductive coil and the second inductive coil are not the same according to the first target parameter value and the second target parameter value;
or, the switching circuit is connected to the second inductor loop, the processor is configured to control the switching unit to switch between the first operating state and the second operating state, and to record a first target parameter value in the second inductor loop when the switching unit is in the first operating state and a second target parameter value in the second inductor loop when the switching unit is in the second operating state, respectively, and control the switching unit to switch the current operating state when it is determined that the magnetic field directions of the first inductor coil and the second inductor coil are different according to the first target parameter value and the second target parameter value.
5. A hearing aid compatible device according to any one of claims 1 to 4, wherein the first inductor winding is a hearing aid compatible inductor winding and the second inductor winding is a receiver inductor winding.
6. The hearing aid compatible device of claim 5 wherein said first inductor winding and said second inductor winding are disposed back-to-back.
7. A hearing aid compatible mobile terminal, characterized in that it comprises a hearing aid compatible device according to any one of claims 1 to 6.
8. A method for realizing hearing aid compatibility of a mobile terminal comprises an audio encoding and decoding device, a first inductance coil and a second inductance coil, wherein two ends of the first inductance coil and the second inductance coil are respectively connected with a positive output end and a negative output end of the audio encoding and decoding device to form a corresponding first inductance loop and a corresponding second inductance loop, and the method comprises the following steps:
acquiring a first target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a first direction and a second target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a second direction opposite to the first direction;
if the first target parameter value and the second target parameter value meet a set condition, switching the direction of the current in the first inductance loop;
or, acquiring a first target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a first direction and a second target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction;
if the first target parameter value and the second target parameter value meet a set condition, switching the direction of the current in the second inductance loop; wherein the first inductance coil is an HAC inductance coil; the second inductance coil is a receiver inductance coil.
9. The method of claim 8, further comprising:
judging whether a command for starting a compatible mode of the hearing aid is received;
if so, executing the step of obtaining a first target parameter value in the first inductance loop when the direction of the current in the first inductance loop is in a first direction and a second target parameter value in the first inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction, or executing the step of obtaining a first target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in the first direction and a second target parameter value in the second inductance loop when the direction of the current in the second inductance loop is in a second direction opposite to the first direction.
CN201810367240.3A 2018-04-23 2018-04-23 Hearing-aid compatible device, mobile terminal and method for realizing hearing-aid compatibility Active CN110392332B (en)

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