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DESCRIPTION JP2014011710

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DESCRIPTION JP2014011710
Abstract: The present invention relates to wireless communication between a portable terminal
and a hearing aid, and provides a portable terminal adapter free of noise derived from
continuous burst radio waves emitted by portable radio waves and a hearing aid system using
the same. The portable terminal adapter includes a signal processing unit connected to a first
microphone for collecting the sound of the portable terminal, a magnetic communication
modulation unit for magnetically communicating a signal from the signal processing unit, and A
hearing aid processing unit connected via a switching unit to an output side of a second
microphone that collects surrounding sound; and a first antenna that transmits a signal of the
magnetic communication modulation unit; A receiver connected to the output side of the hearing
aid processing unit, a third antenna for receiving magnetic communication connected to the
input side of the switching unit via the magnetic communication demodulation unit, and
magnetism from the third antenna And a magnetic communication detection unit that instructs
the switching unit to output a signal from the magnetic communication demodulation unit to the
hearing aid processing unit when communication is detected. [Selected figure] Figure 1
Mobile terminal adapter and hearing aid system using the same
[0001]
The present invention relates to a portable terminal adapter and a hearing aid system using the
same, for example, an object attached to a portable terminal including a portable telephone and a
portable information terminal and transmitting a signal to the hearing aid contactlessly.
[0002]
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1
From the era of landline phones to the present day when mobile phones and smart phones have
been realized, there is a strong demand to listen to the voice of the phone with a hearing aid.
However, if the telephone is brought close to the ear with the hearing aid, the sound leaked from
the receiver of the hearing aid will be reflected on the surface of the handset and input to the
microphone, and howling may occur in high gain hearing aids, making it unusable. The The
following methods have been put to practical use to solve it. One of them is a method of
providing a coil for receiving an audio band magnetic field called a telecoil in a hearing aid and
detecting a drive magnetic field of a vibrating plate leaking from a receiver to reproduce voice,
and an input circuit is switched from a microphone to a telecoil. This is advantageous in that
feedback from the receiver to the microphone is eliminated and howling does not occur (see, for
example, Patent Document 1).
[0003]
Another one is a method using a low power wireless interface called Bluetooth (registered
trademark), which has a high loading rate in a mobile phone (see, for example, Patent Document
2).
[0004]
In addition, although it is possible to use even if the telephone and the hearing aid are separated
by about 10 m by the method using Bluetooth, it is difficult to incorporate high power Bluetooth
into the hearing aid, so the neck strap is used to hang the neck Many methods are adopted in
which Bluetooth is built into the relay device of the shape and wirelessly connected to the mobile
phone, and the relay device to the hearing aid is connected using a magnetic communication
interface using weak radio waves with extremely low power consumption on the hearing aid side.
ing.
[0005]
In addition, it is clear that if a magnetic communication interface is built in a mobile phone,
neither Bluetooth nor a repeater will be necessary (see, for example, Patent Document 3), but the
application of the magnetic communication interface with a short communication distance of
around 1 m is a hearing aid It is not difficult to implement a magnetic communication interface
that can only benefit from people who use hearing aids in mobile phones that are limited, and
thus are strongly required to be smaller and lighter.
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2
[0006]
Patent No. 4709228 JP, 2010-246121, A JP, 2007-325042, A
[0007]
At present, with the widespread use of wireless portable terminals such as mobile phones and
smart phones, it is necessary to achieve high-quality communication characteristics when
hearing aids are also used in combination with wireless portable terminals.
[0008]
However, in recent years mobile phones use a piezoelectric receiver that does not generate a
magnetic field to reduce power consumption and thinness, and smart phones use the operation
screen itself as a receiver. There is a problem that the hearing aid system which uses can not be
used.
Furthermore, among the portable terminals, in the system using GSM (registered trademark)
(Global System for Mobile communications) or a specific small power, since the continuous burst
radio wave whose repetition frequency is in the voice region is emitted, when the portable
terminal is used close to a hearing aid There is a problem that a strong high frequency signal is
input to a telecoil amplifier or a microphone amplifier in a hearing aid that amplifies an analog
signal to saturate its amplitude, and the repetition frequency component of the continuous burst
is detected and heard as noise.
[0009]
Further, in the conventional hearing aid system using Bluetooth, it is inconvenient because it is
necessary to keep the above-mentioned relay device on the neck not only during a call but also
while waiting for an incoming call.
[0010]
Then, an object of this invention is to provide the portable terminal adapter which can receive
the audio | voice from this portable terminal only by mounting | wearing a portable terminal, and
a hearing aid system using the same.
[0011]
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And in order to achieve this object, the portable terminal adapter of the present invention is
provided with an adapter body mounted to the portable terminal, and a first microphone
provided in the adapter body and collecting the sound of the portable terminal. A signal
processing unit connected to the first microphone; a magnetic communication modulation unit
that magnetically modulates a signal from the signal processing unit; and a first antenna that
transmits a signal of the magnetic communication modulation unit Configure
[0012]
Further, the hearing aid system according to the present invention comprises the portable
terminal adapter and a hearing aid to which an audio signal from the portable terminal adapter is
supplied, the hearing aid comprising a second microphone for collecting ambient sound, and A
hearing aid processing unit connected to the output side of the second microphone via the
switching unit, a receiver connected to the output side of the hearing aid processing unit, and an
input side of the switching unit connected via the magnetic communication demodulation unit
When the magnetic communication from the third antenna receiving the magnetic
communication and the third antenna is detected, the signal from the magnetic communication
demodulation unit is output to the hearing aid processing unit with respect to the switching unit.
And a magnetic communication detection unit for instructing to
[0013]
And, with the above configuration, the intended purpose is achieved.
[0014]
According to the above configuration of the present invention, a portable terminal equipped with
a receiver that does not generate a magnetic field only by attaching a portable terminal adapter
to the back of the case emits a portable radio wave without using the above-described neck type
relay device. A hearing aid system free of noise derived from continuous burst radio waves can
be realized.
[0015]
The figure which shows the use condition in Embodiment 1 of this invention The block diagram
of the same hearing aid The block diagram of the same portable terminal adapter The
perspective view of the same portable terminal adapter
[0016]
Hereinafter, embodiments of the hearing aid of the present invention will be described in detail
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with reference to the drawings.
[0017]
First Embodiment FIG. 1 shows a use state of a hearing aid system according to an embodiment
of the present invention.
[0018]
In FIG. 1, the hearing aid 1 is in a state of being attached to the ear 2, and a microphone 3
(second microphone) that collects surrounding sound and a hearing aid that performs hearing
aid processing on audio data collected by the microphone 3 The processing unit 4 (see FIG. 2)
and the receiver 5 for outputting the sound data subjected to the hearing aid processing by the
hearing aid processing unit 4 as vibration of sound and the magnetic communication transmitted
from the portable terminal adapter 6 described later It has an antenna coil 7 (third antenna) for
magnetic communication reception.
[0019]
The portable terminal 8 is provided with a receiver 9 for outputting the voice of the telephone,
and in the vicinity of the receiver 9, the portable terminal adapter 6 is attached to the back side
of the portable terminal 8.
[0020]
The portable terminal adapter 6 is attached to the portable terminal 8, and the microphone 10
(first microphone) for collecting the sound output from the receiver 9 and the portable terminal
adapter 6 are provided around the hearing aid 1 with respect to the hearing aid 1 A magnetic
communication transmission antenna coil 11 (first antenna) for performing magnetic
communication and a portable terminal antenna 12 (second antenna) for receiving radio waves
of the portable terminal 8 are provided.
[0021]
Next, the detailed configuration of the hearing aid 1 will be described with reference to FIG.
[0022]
The audio data input by the microphone 3 is amplified by the microphone amplifier 13,
converted into digital audio data by the A / D converter 18, and then input to the switching unit
14.
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[0023]
The fluctuation of the magnetic field received by the magnetic communication reception antenna
coil 7 is amplified by the magnetic communication RF amplifier 15 and then demodulated into
voice data by the magnetic communication demodulation unit 16 and input to the switching unit
14.
[0024]
As described above, the switching unit 14 switches input signals from the microphone amplifier
13 and the magnetic communication demodulation unit 16 so that the A / D converter 18 is
selected in the normal operation of the hearing aid 1. It has become.
[0025]
Further, the magnetic communication detection unit 17 is connected to the magnetic
communication RF amplifier 15 and the switching unit 14, and the magnetic level input from the
magnetic communication RF amplifier 15 is a predetermined value (for example, an intermediate
value of the power supply voltage of the magnetic communication RF amplifier 15 When it
exceeds, the control unit controls the switching unit 14 to select the input of the magnetic
communication demodulation unit 16.
[0026]
The audio data output from the switching unit 14 is output to the hearing aid processing unit 4
to perform hearing aid processing so as to be suitable for the hearing aid 1 user's hearing and
output it to the D / A converter 19.
[0027]
The D / A converter 19 converts the digital signal into an analog signal and outputs the analog
signal to the receiver amplifier 20. The analog signal is output to the receiver 5 via the receiver
amplifier 20 that amplifies the analog signal.
[0028]
With such a configuration, in the normal use state in which the hearing aid 1 performs the
hearing aid processing on the ambient sound collected by the microphone 3 by the hearing aid
processing unit 4 from the receiver 5, the magnetic communication detection unit 17 When the
signal from the portable terminal adapter 6 is detected, the switching unit 14 automatically
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switches to the voice data transmitted from the portable terminal adapter 6 by magnetic
communication, so that the call mode in the portable terminal 8 is performed. It can be set to
[0029]
Next, the detailed configuration of the mobile terminal adapter 6 will be described with reference
to FIG.
[0030]
The sound of the portable terminal 8 collected by the microphone 10 is amplified by the
microphone amplifier 21, converted from an analog signal to a digital signal by the A / D
converter 22, and then sent to the signal processing unit 23.
[0031]
Further, the mobile terminal radio wave detection unit 24 notifies the signal processing unit 23
when the mobile terminal reception level at which the mobile terminal antenna 12 receives a
radio wave emitted during a call by the mobile terminal antenna 12 exceeds a predetermined
threshold. Do.
Note that the reception level of the radio wave of the mobile terminal 8 received by the mobile
terminal antenna 12 changes depending on the positional relationship between the antenna of
the mobile terminal 8 and the attachment of the mobile terminal adapter 6, the threshold of the
mobile terminal reception level It is desirable not to decide uniformly, but to be able to set
arbitrarily.
[0032]
The signal processing unit 23 transmits the audio data from the A / D converter 22 to the
magnetic communication modulation unit 25 when the notification is received from the mobile
terminal radio wave detection unit 24.
[0033]
The magnetic communication modulation unit 25 digitally modulates at least one of the
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amplitude, phase and frequency of the carrier frequency in accordance with the audio data from
the signal processing unit 23.
Then, the magnetic field digitally modulated by the magnetic communication modulation unit 25
is transmitted from the magnetic communication transmission antenna coil 11.
[0034]
Furthermore, it has a volume up button 26, a volume down button 27, and a mode switching
button 28 connected to the signal processing unit 23. By operating these buttons, the volume
adjustment of the hearing aid 1 and the operation mode of the hearing aid 1 can be performed.
Switch.
The state of these buttons is converted into a control signal to the hearing aid 1 by the signal
processing unit 23, modulated by the magnetic communication modulation unit 25, and then
transmitted from the magnetic communication transmission antenna coil 11.
[0035]
Further, although the portable terminal adapter 6 having such a configuration is driven by the
battery 29, the signal processing unit 23 and the portable terminal 6 are in a standby state, that
is, when the portable terminal 8 is not in a call state. Only the antenna 12 and the mobile
terminal radio wave detection unit 24 are supplied with power, and are activated.
In such a state, the signal processing unit 23 controls the power switch 33 by detecting the radio
wave of the mobile terminal 8 by the mobile terminal radio wave detection unit 24, and the
microphone 10, the microphone amplifier 21, the magnetic communication modulation unit 25,
The power of the magnetic communication transmission antenna coil 11 is turned on.
By doing this, when the portable terminal 8 is not in a call state, the portable terminal adapter 6
can be driven with the minimum power, so that the wasteful consumption of the battery 29 can
be prevented.
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[0036]
In the above configuration, when the portable terminal 8 is not in a call state, the portable
terminal adapter 6 is in the energy saving mode by suppressing the power supply of unnecessary
circuits, and the portable terminal radio wave detection unit 24 is a portable terminal. When the
radio wave of 8 is detected, that is, when the portable terminal 8 is in a call state, the signal
processing unit 23 transmits the microphone 10, the microphone amplifier 21, the magnetic
communication modulation unit 25, the magnetic communication Power is supplied to the
reliable antenna coil 11 so that magnetic communication with the hearing aid 1 can be
performed.
Then, the sound leaking from the receiver 9 of the portable terminal 8 is collected by the
microphone 10 and transmitted to the hearing aid 1 by magnetic communication.
[0037]
FIG. 4 is a perspective view of the mobile terminal adapter 6.
[0038]
Since the portable terminal adapter 6 is used by being attached to the portable terminal 8, it is
desired that the portable terminal adapter 6 not get in the way when carrying the portable
terminal 8.
So, in this embodiment, dome shape is adopted as a shape of a case which does not get caught
and does not get in the way.
[0039]
The housing of the mobile terminal adapter 6 includes a dome-shaped lid 30 and a disk-shaped
bottom 31.
[0040]
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The cover 30 is provided with a volume up button 26, a volume down button 27, and a mode
switching button 28 (see FIG. 4A). The bottom 31 is provided with a microphone 10, an antenna
coil 11 for transmitting magnetic communication, and an antenna for portable terminals 12, a
battery 29, and a circuit board 32 are provided (see FIG. 4 (b)).
In addition, a sound collection opening (not shown) is provided at the installation location of the
microphone 10 at the bottom 31 so that the sound emitted by the receiver 9 of the portable
terminal 8 can be easily collected.
[0041]
The circuit board 32 includes the microphone amplifier 21, the A / D converter 22, the signal
processing unit 23, the mobile terminal radio wave detection unit 24, and the magnetic
communication modulation unit 25.
[0042]
And in order to affix the adapter 6 for portable terminals to the portable terminal 8, the back
surface of the bottom part 31 is equipped with adhesive members, such as a double-sided tape
(not shown).
[0043]
The magnetic communication transmission antenna coil 11 is provided along the outer periphery
of the bottom portion 31.
Thus, by increasing the diameter of the magnetic communication transmission antenna coil 11 as
much as possible, the range in which the magnetic communication reception antenna coil 7
provided in the hearing aid 1 can receive this magnetic field can be broadened. As a result, the
portable terminal 8 can communicate favorably even in a state of being slightly deviated from
the ear 2.
[0044]
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10
The battery 29 is disposed substantially at the center of the bottom 31.
This is in consideration of the case shape of the adapter 6 for a portable terminal, and since it is a
place where the height of the central portion of the lid 30 can be secured, it contributes to
designing the lid 30 in a dome shape There is.
[0045]
As described above, the adapter for portable terminal 6 has a dome shape, and when used by
being attached to the portable terminal 8, it becomes convenient and convenient.
[0046]
Further, by arranging the magnetic communication transmission antenna coil 11 on the outer
periphery of the mobile terminal adapter 6 in order to make the diameter of the antenna coil 11
for transmission as large as possible, the allowable range of positional deviation between the
mobile terminal 8 and the hearing aid 1 can be widened. It will be easy to use.
[0047]
In the present embodiment, the portable terminal adapter 6 detects the radio wave of the
portable terminal 8 and determines that the communication state is established, but voice
communication is performed with the hearing aid 1, but the present invention is not limited
thereto. If the transmission function from the adapter 6 is controlled to be effective / ineffective
by a mechanical switch or the like, it can be applied to, for example, a music reproduction
function other than the call function of the portable terminal 8.
[0048]
As described above, according to the hearing aid of the present invention, a portable terminal
equipped with a receiver that does not generate a magnetic field only by attaching a portable
terminal adapter to the back of the case does not use the above-described neck-type relay device
and Since a hearing aid system without noise derived from continuous burst radio waves emitted
by portable radio waves can be realized, wide use is expected.
[0049]
Reference Signs List 1 hearing aid 2 ear 3 microphone 4 hearing aid processing unit 5 receiver 6
adapter for mobile terminal 7 antenna coil for magnetic communication reception 8 mobile
terminal 9 receiver 10 microphone 11 antenna coil for magnetic communication transmission 12
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antenna for mobile terminal 12 microphone amplifier 14 switching unit 15 Magnetic
communication RF amplifier 16 Magnetic communication demodulation unit 17 Magnetic
communication detection unit 18 A / D converter 19 D / A converter 20 Receiver amplifier 21
Microphone amplifier 22 A / D converter 23 Signal processing unit 24 Mobile terminal radio
wave detection unit 25 Magnetic communication modulation unit 26 volume up button 27
volume down button 28 mode switching button 29 battery 30 lid 31 bottom 32 circuit board 33
power switch
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