JP2011172076A - Audio transmitting/receiving device unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induced-magnetic-field-coping audio transmitting/receiving device unit, in which occurrence of noise caused by influences of electromagnetic waves oscillated from a portable electronic apparatus is reduced. <P>SOLUTION: An audio transmitting/receiving device unit 1 includes: a portable electronic apparatus 10 in which an induced magnetic field transmitting element 11 oscillating an audio signal SX is mounted; and an audio receiving device 20 in which an induced magnetic field receiving element 21 for receiving the audio signal SX is mounted. The audio receiving device 20 includes: a plurality of filters 61 and 62 for reducing signals of different frequency bands; and a filter switching section 40, to which frequency information I1 of electromagnetic waves oscillated from the portable electronic apparatus 10 or filter selection information I2 obtained based on the frequency information I1 is inputted, and which selects any one of the plurality of filters 61 and 62 in accordance with the frequency information I1 and connects it to the induced magnetic field receiving element 21. The portable electronic apparatus 10 includes an information input section 13 for inputting the information I1 or I2 to the filter switching section 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention
A portable electronic device equipped with an induction magnetic field transmitting element that oscillates using an audio signal as an induction magnetic field;
An induction magnetic field receiving element that receives an audio signal oscillated from the induction magnetic field transmitting element, and an audio receiving device equipped with an audio output element that outputs the audio signal received by the induction magnetic field receiving element,
The present invention relates to a voice transmitting / receiving device unit that supports an induced magnetic field.

  There is a Hearing Aid Compatibility (Hearing Aid Compatibility, HAC) technology that allows a person using a hearing aid to listen to sound output from a portable electronic device such as a mobile phone through the hearing aid. As an HAC, an accessory component in which an induction coil (T-coil, induction magnetic field transmitting element) that oscillates an audio signal as an induction magnetic field is mounted in the portable electronic device main body is attached, and the audio signal from the portable electronic device main body is installed inside the hearing aid. There is an induction magnetic field system in which an induction coil (T-coil, induction magnetic field receiving element) is received that receives as an induction magnetic field. In this method, an audio signal is transmitted from the portable electronic device body through the induction coil in the accessory part, and the resonance between the induction coil on the portable electronic device side and the induction coil on the hearing aid side causes the electronic signal to be transmitted to the induction coil on the hearing aid side. An audio signal from the device is received as an induced magnetic field, and the audio signal is output from the hearing aid.

Referring to FIG. 4, a portable electronic device such as a mobile phone equipped with a dielectric coil (inductive magnetic field transmitting element) that oscillates with an audio signal as an induction magnetic field, and an audio signal oscillated from the dielectric coil of the portable electronic device A conventional configuration example of a voice transmitting / receiving device unit corresponding to an induced magnetic field, which includes a voice receiving device such as a hearing aid equipped with a dielectric coil (inductive magnetic field receiving element) for receiving the magnetic field, will be described.
Here, a mobile phone and a hearing aid are shown as examples.

In the voice transmitting / receiving device unit 101, two modes, a normal mode and an induction coil mode, are switched and used.
When the user uses the induction coil mode, the accessory 110Y on which the induction coil 111 is mounted is connected to the main body 110X of the portable electronic device 110.

The audio receiving device 120 includes
An induction coil 121 for receiving the audio signal SX in the induction coil mode;
A microphone 122 for receiving the external audio signal SY in the normal mode;
An amplification circuit (Amplifier) 170 that amplifies the received audio signal regardless of the mode;
A speaker 180 that outputs the audio signal amplified by the amplifier 170 is provided.

The audio receiving device 120 also has
A manual input unit 131 for manually switching between two modes, a normal mode and an induction coil mode;
There is provided a switching circuit 132 that selects and connects either the induction coil 121 or the microphone 122 to the amplifier circuit 170 according to the mode input to the manual input unit 131 and selected.
The switching circuit 132 is controlled via a control unit 150 interposed between the manual input unit 131 and the switching circuit 132.

  In addition to the audio output interface in the normal mode, an induction coil accessory connection interface is mounted on the main body 110X of the portable electronic device 110. The main body 110X of the portable electronic device 110 is provided with a manual input unit (not shown) for manually switching between two modes, a normal mode and an induction coil mode, and the induction coil mode is selected in the manual input unit. At this time, the audio output path is switched to the induction coil accessory connection interface 112 via the control unit 114.

  When the audio output path is switched to the induction coil accessory connection interface 112, the audio signal SX is output through the induction coil 111 mounted on the accessory 110Y, and the audio signal SX is guided to the audio receiver 120. Received by the coil 121. The audio signal SX is output via the amplifier circuit 170 and the speaker 180 in the audio receiving device 120.

  Since the induction magnetic field received by the induction coil of the voice receiving device is an audio signal, the frequency thereof is as low as 4 kHz or less, for example, whereas the frequency of electromagnetic waves from the portable electronic device is very high, usually several hundred MHz. That's it. The power fluctuation of the high-frequency electromagnetic wave oscillated from the portable electronic device affects the induction coil on the voice receiving device side, causing unnecessary resonance, and the magnetic field induced by the induction coil of the voice receiving device is fluctuated to change the voice receiving device. Unnecessary noise (electromagnetic coupling noise) may be added to the sound output from the.

  For example, it is oscillated from the portable electronic device and received by the voice receiving device due to power fluctuation of wireless communication, TDMA (Time Division Multiple Access) switching operation, fluctuation of the positional relationship between the portable electronic device and the voice receiving device, etc. As a result, the AM (Amplitude Modulation) modulation component is induced in the induction coil of the hearing aid, thereby causing unnecessary resonance.

FIG. 5 is an example of a graph schematically showing how electromagnetic coupling occurs when a conventional voice transmitting / receiving device unit compatible with an induced magnetic field is used. The horizontal axis represents time, and the vertical axis represents the power received by the induction coil in the audio receiving device among the electromagnetic waves oscillated from the portable electronic device. Time t1 to t4 is a usage period. At the beginning of use of the portable electronic device to several minutes (t1 to t2) and from several minutes before the end of use to the end of use (t3 to t4), the power fluctuation of the wireless communication greatly fluctuates. The fluctuation of the electric power received by the induction coil in the voice receiving device is large, and unnecessary electromagnetic coupling noise is likely to occur.
In some cases, not only the user's own portable electronic device but also the influence of electromagnetic waves oscillated from the portable electronic device used by others cannot be ignored.

  In Patent Document 1, a body of a main body that includes an induction magnetic field receiving element that receives an induction magnetic field output from a mobile phone or the like is arranged so that the induction magnetic field reception element covers a housing portion of the main body that mainly receives the induction magnetic field. A hearing aid provided with an electromagnetic wave shielding conductive layer (21) is disclosed (Claim 2, FIG. 2, etc.). The electromagnetic wave shielding conductive layer (21) shields electromagnetic waves from a mobile phone or the like, but does not substantially reduce the induced magnetic field received by the induced magnetic field receiving element (paragraph 0029).

JP 2005-318342 A JP 2009-258268 A

  In Patent Document 1, an electromagnetic wave shielding conductive layer (21) that shields electromagnetic waves from a mobile phone or the like and that does not substantially reduce the induced magnetic field received by the induced magnetic field receiving element is provided on the main body that mainly receives the induced magnetic field. Yes. However, in general, when an electromagnetic wave shielding conductive layer is provided, the induction magnetic field received by the induction magnetic field receiving element is also reduced, so that the electromagnetic field from the mobile phone or the like is shielded while the induction magnetic field received by the induction magnetic field receiving element is substantially reduced. It is difficult to design a conductive layer for shielding electromagnetic waves that will not be lowered. It is preferable that unnecessary noise can be removed without providing an electromagnetic wave shielding conductive layer.

  Patent Document 2 discloses a signal processing apparatus including a plurality of filter processing means for performing filter processing on a sound pickup signal obtained based on a sound pickup operation by a microphone, and a signal processing method using the same as noise canceling means. (Claim 1 etc.). In Patent Document 2, a plurality of NC filters (FIG. 3) are used as filter processing means. Paragraph 0032 of Patent Document 2 describes that the signal processing device can be applied to a hearing aid or the like.

  However, Patent Document 2 does not describe application to an audio transmission / reception device unit compatible with an induction magnetic field. In the audio transmission / reception equipment unit for the induction magnetic field, it is necessary to develop a dedicated noise canceling mechanism. In an audio transmitting / receiving device unit that supports an induced magnetic field, it is necessary to develop an optimal noise canceling mechanism in consideration of a connection link between a portable electronic device and an audio receiving device such as a hearing aid.

The present invention has been made in view of the above circumstances,
A portable electronic device equipped with an induction magnetic field transmitting element that oscillates using an audio signal as an induction magnetic field;
An induction magnetic field receiving element that receives an audio signal oscillated from an induction magnetic field transmitting element, and an audio receiving device equipped with an audio output element that outputs an audio signal received by the induction magnetic field receiving element,
It is an object of the present invention to provide an audio transmission / reception device unit compatible with an induction magnetic field in which the generation of noise due to the influence of electromagnetic waves oscillated from a portable electronic device is reduced.

The voice transmitting / receiving device unit of the present invention is
A portable electronic device equipped with an induction magnetic field transmitting element that oscillates using an audio signal as an induction magnetic field;
From an induction magnetic field receiving element that receives the audio signal oscillated from the induction magnetic field transmitting element, and an audio receiving device equipped with an audio output element that outputs the audio signal received by the induction magnetic field receiving element. An audio transmission / reception device unit,
The sound receiving device includes a plurality of filter means provided between the induction magnetic field receiving element and the sound output device for reducing signals in different frequency ranges, and a frequency of an electromagnetic wave oscillated from the portable electronic device. Filter selection information inputted based on the information or the frequency information, and selecting and connecting one of the plurality of filter means according to the frequency information to the induction magnetic field receiving element Means, and
The portable electronic device includes information input means for inputting the frequency information or the filter selection information to the filter switching means.

According to the present invention,
A portable electronic device equipped with an induction magnetic field transmitting element that oscillates using an audio signal as an induction magnetic field;
An induction magnetic field receiving element that receives an audio signal oscillated from an induction magnetic field transmitting element, and an audio receiving device equipped with an audio output element that outputs an audio signal received by the induction magnetic field receiving element,
It is possible to provide an audio transmission / reception device unit compatible with an induction magnetic field in which the generation of noise due to the influence of an electromagnetic wave oscillated from a portable electronic device is reduced.

It is the schematic explaining use of the audio | voice transmission / reception apparatus unit corresponding to the induction magnetic field of one Embodiment which concerns on this invention. It is an internal block diagram of the audio | voice transmission / reception apparatus unit of FIG. It is a flowchart explaining operation | movement of the audio | voice transmission / reception apparatus unit of FIG. It is a block diagram of the conventional audio | voice transmission / reception apparatus unit corresponding to an induction magnetic field. It is an example of the graph which shows typically a mode that electromagnetic coupling generate | occur | produces when using the conventional audio | voice transmission / reception apparatus unit corresponding to an induction magnetic field.

  With reference to drawings, the structure of the audio | voice transmission / reception apparatus unit corresponding to the induction magnetic field of one Embodiment which concerns on this invention is demonstrated. FIG. 1 is a schematic diagram for explaining the use of a voice transmitting / receiving device unit corresponding to an induction magnetic field according to this embodiment. FIG. 2 is an internal configuration diagram of the voice transmitting / receiving device unit of the present embodiment. FIG. 3 is a flowchart for explaining the operation of the voice transmitting / receiving device unit of this embodiment. In FIG. 1, the scale of each component is appropriately changed, and the voice receiving device 20 and the like are exaggerated to be larger than the actual ones.

  As shown in FIGS. 1 and 2, the audio transmission / reception device unit 1 of this embodiment includes a portable electronic device 10 that oscillates an audio signal SX, an audio signal SX oscillated from the portable electronic device 10, and an external audio signal. It is configured by an audio receiving device 20 that switches between SY and receives and outputs the received audio signal as audio.

  Examples of the portable electronic device 10 include a mobile phone, a PDA (Personal Data Assistance, Personal Digital Assistants), a portable audio player, and the like. Examples of the sound receiving device 20 include a hearing aid, an earphone, and headphones.

  The portable electronic device 10 includes a main body 10X and an accessory part 10Y. The accessory 10Y can be attached to and detached from the main body 10X, and an induction coil (T-coil, induction magnetic field transmitting element) 11 that oscillates with the audio signal SX as an induction magnetic field is mounted therein. An antenna 10Z for transmitting and receiving electromagnetic waves between the portable electronic device 10 and the communication base station 100 is attached to the main body 10X.

The audio receiving device 20 receives an induction coil (T-coil, induction magnetic field receiving element) 21 that receives the audio signal SX oscillated from the induction coil 11 of the portable electronic device 10 as an induction magnetic field, and an external audio signal SY. A possible microphone (external audio receiving element) 22 (abbreviated in FIG. 1) is mounted.
The audio receiving device 20 is equipped with a speaker (audio output element) 80 that outputs audio signals SX and external audio signals SY.

  As shown in FIG. 2, the sound receiving device 20 is equipped with receiving element switching means 30 that switches and connects the induction coil 21 or the microphone 22 to the speaker 80. The receiving element switching means 30 includes a manual input unit 31 that allows the user P to manually switch between two modes, a normal mode and an induction coil mode, and a speaker 80 that is input to the manual input unit 31 and selected according to the selected mode. On the other hand, a switching circuit 32 that selects and connects either the induction coil 21 or the microphone 22 and a signal that is input to the manual input unit 31 are input, and a control unit 50 that controls the switching circuit 32 based on the signal. It is included.

The audio receiving device 20 further includes
A plurality of filter circuits (filter means) 61 and 62 provided to reduce noise signals included in the audio signal received by the induction coil 21 and reducing signals in different frequency ranges;
Filter switching means 40 for selecting and connecting one of the plurality of filter circuits 61 and 62 to the switching circuit 32 based on the frequency information I1 of the electromagnetic wave oscillated from the portable electronic device 10 is mounted. Yes.
In the present embodiment, two filter circuits 61 and 62 are provided, but the number of filter circuits may be three or more.

The filter switching means 40 includes
An external connection interface 43 to which filter selection information I2 obtained based on the frequency information I1 is input in the filter circuit switching interface 13 described later in the portable electronic device 10;
A switching circuit 44 that selects and connects one of the plurality of filter circuits 61 and 62 according to the filter selection information I2 to the switching circuit 32;
The filter selection information I2 input to the external connection interface 43 is input, and a control unit 50 that controls the switching circuit 44 based on this signal is included.
Of the plurality of filter circuits 61 and 62, the filter circuit that can more effectively remove the signal having the frequency of the electromagnetic wave oscillated from the portable electronic device 10 is selected by the filter switching means 40.

The audio receiving device 20 further includes
An amplifier circuit (amplifier) 70 for amplifying a signal output from the filter circuit 61 or 62 selected by the filter switching means 40 is mounted between the plurality of filter circuits 61 and 62 and the speaker 80. .

In addition to an audio output interface (not shown) in the normal mode, an induction coil accessory connection interface 12 is mounted on the main body 10X of the portable electronic device 10.
A control unit 14 for controlling various interfaces is mounted on the main body 10X. The main body 10X is provided with a manual input unit (not shown) for manually switching between two modes, the normal mode and the induction coil mode. When the induction coil mode is selected in the manual input unit, the control unit 14, the audio output path is switched to the induction coil accessory connection interface 12.

In the portable electronic device 10, the frequency of the electromagnetic wave oscillated from the portable electronic device 10 is measured at any time in the communication base station 100 of the portable electronic device 10, and the frequency information I1 is transmitted to the control unit 14 at any time through wireless communication. Entered.
Frequency information I1 is input from the control unit 14 to the main body 10X of the portable electronic device 10, and the frequency of the electromagnetic wave oscillated from the portable electronic device 10 out of the filter circuits 61 and 62 based on the frequency information I1. A filter circuit switching interface (information input means) 13 for selecting a filter circuit from which a signal can be more effectively removed and transmitting the obtained filter selection information I2 to the filter circuit switching interface 43 of the voice receiving device 20 Is installed.

  In the present embodiment, the filter circuit switching interface 13 of the portable electronic device 10 and the external connection interface 43 of the audio receiving device 20 are electrically connected via a wired cable 90. However, the connection between the interfaces 13 and 43 is not limited to a wired connection, and may be a wireless communication connection using a wireless Internet line or a wireless IC tag.

With reference to FIG.2 and FIG.3, operation | movement of the audio | voice transmission / reception apparatus unit 1 is demonstrated.
When the induction coil mode is selected in the portable electronic device 10 and the voice receiving device 20 (step S1), the induction coil 21 is selected as a signal receiving element by the receiving element switching means 30 in the voice receiving device 20.
The portable electronic device 10 acquires frequency information I1 of the electromagnetic wave oscillated from the portable electronic device 10, and the filter circuit switching interface 13 of the portable electronic device 10 uses the filter circuits 61 and 62 based on the frequency information I1. Among them, the filter circuit that can more effectively remove the signal of the frequency of the electromagnetic wave oscillated from the portable electronic device 10 is selected to obtain the filter selection information I2 (step S2). Further, the filter circuit switching interface 13 transmits the obtained filter selection information I2 to the filter circuit switching interface 43 of the voice receiving device 20 (step S3).

  The voice receiving device 20 switches the filter circuits 61 and 62 by the filter switching means 40 based on the filter selection information I2 input to the filter circuit switching interface 13 (step S4). As described above, the voice in the induction coil mode is output from the speaker 80 of the voice receiving device 20 (step S5).

  In the present embodiment, in the induction coil mode in which the portable electronic device 10 is used, appropriate filter circuits 61 and 62 are selected according to the frequency of the electromagnetic wave oscillated from the portable electronic device 10, and the portable electronic device 10 is selected. The electromagnetic coupling noise signal generated in the induction coil 21 of the voice receiving device 20 by the electromagnetic wave oscillated from the is effectively removed.

  As described with reference to FIG. 5 in the “Background Art” section, in general, in the use of a portable electronic device, fluctuations in the power of electromagnetic waves oscillated between the start of use and several minutes (t1 to t2). The noise signal is likely to be generated. In this embodiment, simultaneously with the start of use of the portable electronic device 10, the frequency information I1 of the electromagnetic wave oscillated from the portable electronic device 10 is input to the portable electronic device 10 from the base station 100, and the appropriate information is immediately applied. The filter circuits 61 and 62 are selected, and the noise signal generated by the electromagnetic wave oscillated from the portable electronic device 10 can be effectively removed. Therefore, in the present embodiment, the generation of the noise signal can be suppressed in advance before the noise signal is detected, and the noise can be dealt with more quickly than when the noise signal is detected and then removed.

When the normal mode is used, the microphone 22 is selected as the signal receiving element, and the external audio signal SY received through the microphone 22 is output from the speaker 80.
Since the portable electronic device 10 is not used in the normal mode, any of the filter circuits 61 and 62 may be selected. In the normal mode, sound may be output without passing through the filter circuits 61 and 62.
In the present embodiment, in the induction coil mode, it is possible to remove noise signals to some extent due to the influence of electromagnetic waves oscillated from another person's portable electronic device used in the vicinity of the portable electronic device 10.

Further, when the portable electronic device 10 acquires the frequency information I1 of the electromagnetic wave oscillated from the portable electronic device 10 via the base station 100, the other electronic device used at the same time in the vicinity of the portable electronic device 10 If frequency information of electromagnetic waves oscillated from portable electronic devices is also acquired,
In the dielectric coil mode, the filter circuits 61 and 62 are switched according to the frequency information of the electromagnetic waves oscillated from the portable electronic device 10 and other portable electronic devices used in the vicinity thereof, and in the vicinity of the user. Therefore, a noise signal due to the influence of an electromagnetic wave oscillated from a portable electronic device used by another person can be effectively removed, which is preferable.
In such an aspect, even in the normal mode, by connecting the portable electronic device 10 to the audio receiving device 20, noise due to the influence of electromagnetic waves oscillated from the portable electronic device used by others in the vicinity of the user. The signal can be effectively removed, which is preferable.

  As described above, according to the present embodiment, it is possible to provide the voice transmission / reception device unit 1 compatible with the induction magnetic field in which the generation of noise due to the influence of the electromagnetic wave oscillated from the portable electronic device 10 is reduced.

(Design changes)
The present invention is not limited to the above-described embodiment, and design changes can be made as appropriate without departing from the spirit of the present invention.

  In the above embodiment, the control unit 14 of the portable electronic device 10 acquires the frequency information I1 of the electromagnetic wave oscillated from the portable electronic device 10, and the frequency information I1 in the filter circuit switching interface 13 of the portable electronic device 10. Of the filter circuits 61 and 62, the filter circuit that can more effectively remove the signal of the frequency of the electromagnetic wave oscillated from the portable electronic device 10 is selected, and the filter selection information obtained from the interface 13 is selected. The I2 is configured to transmit a command to the filter circuit switching interface 43 of the audio receiving device 20.

  The present invention is not limited to the above embodiment, and frequency information I1 of electromagnetic waves oscillated from the portable electronic device 10 is input to the filter circuit switching interface 43 of the audio receiving device 20, and the portable electronic device 10 The filter selection information I2 may be obtained by selecting a filter circuit that can more effectively remove the signal having the frequency of the electromagnetic wave oscillated from the filter.

In the above embodiment, the sound output from the same speaker 80 is performed in both the normal mode and the dielectric coil mode. However, the sound output in the normal mode and the sound output in the dielectric coil mode may be performed by different speakers. .
In the above embodiment, the mode in which the normal mode and the dielectric coil mode can be used has been described. However, the present invention can also be applied to an audio transmission / reception device unit capable of only the dielectric coil mode.
In the above-described embodiment, the aspect in which the accessory with the induction coil mounted on the portable electronic device main body has been described. However, the induction coil may be mounted on the portable electronic device main body.

DESCRIPTION OF SYMBOLS 1 Audio | voice transmission / reception apparatus unit 10 Portable electronic device 10X Main body 10Y Accessory 11 Induction coil (induction magnetic field transmission element)
12 Inductor coil accessory interface 13 Filter circuit switching interface (information input means)
14 control unit 20 voice receiving device 21 induction coil (inductive magnetic field receiving element)
22 Microphone (external audio receiving element)
30 receiving element switching means 31 manual input section 32 switching circuit 40 filter switching means 43 external connection interface 44 switching circuit 50 control sections 61 and 62 filter circuit (filter means)
70 Amplification circuit (amplification means)
80 Speaker (Audio output element)
I1 Frequency information I2 Filter selection information SX Audio signal SY External audio signal

Claims (4)

A portable electronic device equipped with an induction magnetic field transmitting element that oscillates using an audio signal as an induction magnetic field;
From an induction magnetic field receiving element that receives the audio signal oscillated from the induction magnetic field transmitting element, and an audio receiving device equipped with an audio output element that outputs the audio signal received by the induction magnetic field receiving element. An audio transmission / reception device unit,
The sound receiving device includes a plurality of filter means provided between the induction magnetic field receiving element and the sound output device for reducing signals in different frequency ranges, and a frequency of an electromagnetic wave oscillated from the portable electronic device. Filter selection information inputted based on the information or the frequency information, and selecting and connecting one of the plurality of filter means according to the frequency information to the induction magnetic field receiving element Means, and
The portable electronic device is an audio transmission / reception device unit comprising information input means for inputting the frequency information or the filter selection information to the filter switching means. The voice receiving device is
An external audio receiving element capable of receiving an external audio signal, mounted so as to be electrically connectable to the audio output element;
The audio transmitting / receiving device unit according to claim 1, further comprising receiving element switching means for switching and connecting the induction magnetic field receiving element or the external audio receiving element to the audio output element. The voice receiving device is
The audio according to claim 1, further comprising an amplifying unit that amplifies a signal output from the filter unit selected by the filter switching unit between the plurality of filter switching units and the audio output element. Transmitter / receiver unit.   4. The voice transmitting / receiving device unit according to claim 1, wherein the portable electronic device includes a main body on which the information input unit is mounted and an accessory part on which the induction magnetic field transmitting element is mounted.

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