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DESCRIPTION JP2017063391

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DESCRIPTION JP2017063391
Abstract: [Problem] To provide a low-cost, easy-to-use, high-contrast sound quality conversion
apparatus that makes it easy to select a desired sound quality, and that allows the user to directly
feel the sound quality selection. A sound quality conversion device (10) comprises a plurality of
electronic circuit modules of different circuit configurations that are selectively used. The sound
quality of the audio device is changed by selectively inserting one of the plurality of electronic
circuit modules into the input end, output end or input / output signal path of the audio device.
The sound quality conversion device 10 or the electronic circuit module may be provided in the
form of being externally attached to the audio device, or may be provided in a form in which the
socket for detachably mounting the electronic circuit module is provided in the audio device
itself. [Selected figure] Figure 1
Sound quality conversion device, electronic circuit module, and audio equipment
[0001]
The present invention relates to a sound quality converter that changes the sound quality (sound
characteristics) of an audio device.
[0002]
When the user listens to sounds or music, for example, by exaggerating a certain sound range,
modifying a frequency characteristic, or creating, by operating and processing a music signal as a
function of the audio equipment, a sense of realism, It can bring about a psychological effect as
comfort.
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[0003]
As a technique for realizing such an acoustic effect, there is, for example, a physical or electrical
device such as an echo used in a music studio.
Other than that, devices that are analog or digital processed and that are suitable for the
respective purposes are developed and used mainly by electrical devices.
[0004]
On the other hand, among consumer audio devices popularized in general homes, devices
incorporating a sound effect function using a DSP (digital signal processor) in addition to tone
control from old days are popularized.
Parameters such as time, phase, and level are digitally processed to enable realistic playback as
represented by an AV (audio visual) device or the like.
[0005]
In Patent Document 1, an equalizer processing unit that changes the sound quality of the sound
signal to be reproduced and generates a plurality of sound signals having different sound quality
as selection candidates, and uses the selection candidate selected by the user from among the
plurality of selection candidates An audio device has been proposed in which the setting value of
the sound quality of is statistically determined and the setting value obtained by the statistic is
set as the setting value of the sound quality of the sound signal to be reproduced.
[0006]
JP, 2010-192995, A
[0007]
However, many of the conventional apparatuses are stationary, the apparatuses are large, and it
is necessary to selectively use an apparatus with limited functions according to the purpose, such
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as echo and reverb.
Even in the portable type, the functions are limited and it is often difficult to change or add later.
[0008]
In addition, such a conventional device has a wide adjustment range set by one parameter, many
of which have an unused adjustment range other than the range for achieving the purpose, and
there are cases where the cost for developing the device also increases. There are many.
[0009]
Conventional digital signal processing (DSP) technology is good at creating dynamic sounds and
creating realistic sensations such as surround by manipulating the phase, but the sound creation
is rough and functions are limited, and the comfort of more delicate sounds It can not be said
that it is enough as the effect said to make atmosphere.
In processing using a personal computer (PC), there is also an example in which advanced
arithmetic processing increases the load on the central processing unit (CPU) and degrades the
sound quality.
[0010]
In a device having a conventional sound adjustment function, even one or a plurality of
adjustment parameters are not sufficient, and it has not always been easy to finish the desired
sound.
[0011]
If multiple expensive devices are used, the target sound can be achieved, but the cost is high and
the adjustment range of the parameter is wide, so it takes a long time to adjust, so it lacks
simplicity and convenience.
[0012]
In the prior art described in Patent Document 1 above, it is intended to be able to easily set the
sound quality according to the user's preference from a wide sound quality range, but it not only
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requires an expensive device but also displays Since the change of the sound quality is executed
by the microcomputer processing inside the device according to the user's involvement using the
unit and the operation unit, there is a drawback that the user does not realize that he or she is
spontaneously selecting the sound quality.
[0013]
Further, in any of the above-described conventional techniques, the user's desired sound quality
selection operation is not necessarily intuitively understandable in volume operation and
operation on a panel or screen.
[0014]
In such a background, the present invention is a low-cost, easy-to-use, high-convenient sound
quality conversion apparatus that allows users to directly feel the selection of sound quality with
a simple and convenient method of selecting a desired sound quality. It is an object of the present
invention to provide a circuit module and an audio device including the circuit module.
[0015]
Originally, even if an electric component is alone, the sound quality changes only by passing an
audio signal.
The factors are, for example, that even if the capacitors have the same capacitance, there is no
material, no structurally ideal capacitor, and the presence of inductance and resistance
components in addition to the capacitance (capacitance), these parameters affect It is possible
that it fluctuates due to
[0016]
Based on the experience of such a phenomenon, the present inventor mainly operates an
electronic circuit module constituted by circuit elements such as a resistor, a capacitor
(capacitor), a coil (inductor) and the like to the audio signal, thereby the electronic circuit
module. Every thought was made to change the sound quality positively toward the target of the
sound quality anticipated beforehand.
[0017]
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That is, the sound quality conversion device according to the present invention comprises a
plurality of electronic circuit modules having different circuit configurations, and one of the
plurality of electronic circuit modules is placed in an input end, an output end or an input /
output signal path of audio equipment. By selectively interposing, the sound quality of the audio
device is changed.
The electronic circuit module in the present specification is a unit having a certain form that
accommodates an electronic circuit, which can be hand-replaced by the user.
The sound quality converter itself may constitute an electronic circuit module, and the sound
quality converter may contain an electronic circuit module.
[0018]
In fact, since circuit elements which are electrical parts are sold by countless types from various
manufacturers, it is possible to sort out parts suitable for the tone suitable for the purpose in
advance.
For example, since processing of audio signals by passive elements is so-called analog processing,
analog circuit element parts such as capacitors and resistors which can not be processed by
digital processing are selected, and it is possible only with analog passive elements which can not
be achieved with the minimum resolution of digital quantization. Fine and high-resolution
processing can be achieved by the electronic quantum level.
The passive element refers to an electronic circuit element that does not have an active function
such as amplification or conversion of electrical energy.
Further, by using only the passive element, it is possible to realize the simplification of the circuit
configuration, the cost reduction and the low power consumption sound quality conversion
device without the need for a power supply.
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However, in some cases, an active element may be used in addition to the passive element as a
circuit element constituting the electronic circuit module.
[0019]
According to a first aspect of the sound quality conversion device of the present invention, there
is provided a housing including an electronic circuit, and a connector to which an input terminal
and an output terminal of the electronic circuit are connected.
[0020]
According to a second aspect of the sound quality conversion device of the present invention, a
housing for housing an electronic circuit is disposed at the middle of a cable, and connectors are
provided at both ends of the cable.
[0021]
In the first embodiment, as a connector to which an input terminal and an output terminal of the
electronic circuit are connected, a first connector to which the input terminal is connected and a
second connector to which the output terminal is connected are separated. You may have
Alternatively, it may have a single connector in which the input and output terminals of the
electronic circuit are connected together.
[0022]
Another sound quality converter according to the present invention further comprises an
apparatus main body to which the plurality of electronic circuit modules are selectively attached
and detached, wherein the electronic circuit module is provided to the module main body and
one end of the module main body. The apparatus main body unit is connected to a socket
accommodating an input / output connector to be connected to the input / output connector of
the electronic circuit module, and to external first and second audio devices And a first connector
and a second connector.
In this configuration, the user can replace the electronic circuit module as a so-called cartridge
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with one touch quickly and easily.
[0023]
The present invention can also be grasped as an audio device provided with a socket for
detachably mounting an electronic circuit module used for the sound quality conversion device.
In this configuration, the sound quality conversion device is built in the audio device itself. In this
case, the socket preferably has a single connector to which the input terminal and the output
terminal of the electronic circuit are connected together. As a result, the user can replace the
electronic circuit module as a so-called cartridge quickly and easily with one touch.
[0024]
According to the sound quality conversion device according to the present invention, it is
possible to provide a simple and convenient sound quality conversion device which makes it easy
to select a desired sound quality, is low in cost, and allows the user to directly feel the sound
quality selection. can do.
[0025]
In addition, the sound quality conversion operation according to the present invention allows the
user to replace the physical electronic circuit module with the hand, as compared with the
conventional case where the sound quality is changed by volume operation or operation on the
panel or screen. By doing so, the selection operation of the sound quality becomes intuitive and
easy to understand.
[0026]
It is a figure for demonstrating the concept of the sound quality converter of this invention.
(A) (b) is a figure which shows 1st and 2nd embodiment of the sound quality converter as an
exchangeable electronic circuit module by this invention.
(A)-(e) is a figure which shows the use condition of the sound quality converter 10a, 10b shown
to FIG. 2 (a) (b). It is a figure which shows 3rd Embodiment of the sound quality converter by this
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invention. It is a figure which shows the specific structural example of the electronic circuit
module of the sound quality converter in embodiment of this invention. (A) (b) (c) is a figure
showing an example of circuit composition of an electronic circuit module which consists of a
passive element which can be used in all the embodiments of the present invention. (A) (b) (c) is a
figure which shows the other circuit structural example of the electronic circuit module which
consists of a passive element which can be utilized in all the embodiments of this invention. It is a
figure which shows the example of a circuit structure of the electronic circuit module containing
an active element which can be utilized in any embodiment of this invention. It is a figure which
shows the specific application example of the sound quality conversion apparatus 10c of FIG. 4,
or a sound quality conversion apparatus equivalent to this. (A) (b) is explanatory drawing of 4th
Embodiment which incorporated the function of the apparatus main-body part 50 of FIG. 4 in the
sound quality converter.
[0027]
Embodiments of the present invention will be described in detail below with reference to the
drawings.
[0028]
FIG. 1 is a view for explaining the concept of the sound quality conversion device of the present
invention.
[0029]
As shown in FIG. 1A, in general, the first audio device 80 and the second audio device 90 may be
connected and used.
The first audio device 80 is, for example, a device serving as a sound source such as a recording
and reproducing device and a CD player.
The second audio device 90 is, for example, a device such as a recording device, a preamplifier, a
power amplifier, a speaker or a headphone.
[0030]
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As shown in FIG. 1B, the sound quality conversion device 10 according to the present
embodiment is inserted between the audio device 80 and the audio device 90. The audio signal
output from the audio device 80 is processed by the sound quality conversion device 10, and the
processed audio signal is input to the audio device 90.
[0031]
The sound quality conversion device 10 in the present embodiment is provided as including a
plurality of electronic circuit modules of different circuit configurations that are selectively used.
The electronic circuit of each electronic circuit module can be mainly constituted by inexpensive
and easily available passive elements. The sound quality converter 10 selectively inserts one of
the plurality of electronic circuit modules at the output end of the audio device 80, that is, at the
input end of the audio device 90. As a result, the sound quality of the sound output from the
acoustic device 80 can be changed by electrically passing the audio signal to the circuit in the
electronic circuit module. The sound quality (change or tendency of sound quality) obtained by
the individual electronic circuit modules among the plurality of electronic circuit modules is such
that the difference in sound is given by the design evaluation in advance.
[0032]
In addition to technical terms such as loudness as found in psychoacoustics, there are also
expressions that are used customarily for explaining the sound quality by music critics etc. as
expressions of sound quality. In such a thing, "soft sound" "bright sound" "speech sound" "highclass sound" etc. Five senses other than the sense of hearing such as sight, taste, smell, touch
such as sense of the human sense, spatial expression, In some cases, auditory expressions are
artificially expressed using metaphorical expressions, conceptual expressions, and the like.
Although these expressions are largely based on the user's experience, it is considered that they
can be easily recognized commonly by many users if they have the same experience.
[0033]
A plurality of electronic circuit modules cover a wide range of sound quality, and one electronic
circuit module provides a specific sound quality (the adjustment of variable elements may have a
predetermined width). The user does not have to possess a large number of electronic circuit
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modules covering the entire range, but may have an electronic circuit module of sound quality
according to the user's needs and preferences. By mounting a desired electronic circuit module
according to the user's preference, it is possible to instantly change the sound quality.
[0034]
The sound device 80 and the sound device 90 may be in any form such as a stationary type or a
portable type.
[0035]
FIGS. 2 (a) and 2 (b) show first and second embodiments of the sound quality conversion device
as a replaceable electronic circuit module according to the present invention.
[0036]
The sound quality converter 10a shown in FIG. 2 (a) is an electronic circuit module comprising a
main body 30, which is typically a housing, and an input connector 31 and an output connector
32 provided on the main body 30. It is.
The main body 30 is typically configured by a housing that encloses an electronic circuit
including a passive element.
The input connector 31 and the output connector 32 are respectively connected to the input
terminal and the output terminal of the electronic circuit.
[0037]
The input connector 31 and the output connector 32 to which the input terminal and the output
terminal of the electronic circuit are respectively connected are arranged at both ends (opposite
sides) of the main body 30 in the example of this figure. That is, as a connector, it has separately
the 1st connector to which the input terminal was connected, and the 2nd connector to which
the output terminal was connected. The input connector 31 and the output connector 32 are not
limited to this arrangement. For example, they may be arranged on the same side. In this case,
the input connector 31 and the output connector 32 can be simultaneously attached and
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detached. Also, the input connector 31 and the output connector 32 can be configured as a single
connector. The "single connector" includes not only physically single ones but also physically
multiple ones that are simultaneously attached and detached by user operation.
[0038]
The sound quality conversion device 10b shown in FIG. 2B is provided at the main body 30, the
input cable 35 and the output cable 36 provided at both ends of the main body 30, and the ends
of the both cables 35 and 36, respectively. It is an electronic circuit module provided with the
input connector 33 and the output connector 34. The main body 30 is typically a housing, as
shown in FIG. 2 (a). The configuration shown in FIG. 2 (b) can be recognized as that the main
body 30 is disposed in the middle of one cable. That is, this sound quality conversion device can
be recognized as a cable with a sound effect function that connects the sound devices (which is
selectively inserted between the sound devices). In addition, the structure which compounded
both form of FIG. 2 (a) and FIG.2 (b) is also considered. For example, one end of the main body
30 has the connector 31 (or 32) and the other end has the cable 35 (or 36).
[0039]
FIGS. 3 (a) to 3 (e) show the use states of the sound quality conversion devices 10a and 10b
shown in FIGS. 2 (a) and 2 (b). The input connector 31 of the sound quality conversion device
10a is directly connected to the audio device 80, or connected via the input cable 37, and the
output connector 32 is directly connected to the audio device 90, or the output cable 38 There
are four possible usage states shown in FIGS. 3 (a) to 3 (d) depending on the connection. It does
not matter whether the input cable 37 is directly derived from the acoustic device 80 or
connected via a connector. Similarly, it does not matter whether the output cable 38 is directly
derived from the acoustic device 90 or connected via a connector.
[0040]
FIG. 3E shows a use state in which the sound quality conversion device 10 b is connected
between the audio device 80 and the audio device 90.
[0041]
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FIG. 4 shows a third embodiment of the sound quality conversion device according to the present
invention.
In the embodiments shown in FIG. 2 and FIG. 3, the sound quality conversion devices 10a and
10b themselves constitute the electronic circuit module, but in the third embodiment, the sound
quality conversion device is configured as including the electronic circuit module.
[0042]
The sound quality converter 10c according to the third embodiment includes an apparatus main
body 50 to which a plurality of electronic circuit modules are selectively attached and detached.
The electronic circuit module 40 in this embodiment has a module body 41 and an input / output
connector 42 provided at one end of the module body 41.
[0043]
The device body 50 has a housing 55, and the housing 55 includes an input / output connector
(socket) 53 connected to the input / output connector 42 of the electronic circuit module, and
external first and second acoustic devices. , And a signal input connector 51 and a signal output
connector 52. The signal input connector 51 and the signal output connector 52 are connected
to the input / output connector 53 inside the housing 55. The input / output connector 53 may
be provided with a recess (slot) on the surface of the housing 55 so as to be accommodated in
the recess. In this case, by exposing a part of the electronic circuit module in the housed state,
the user can hold the exposed portion with a finger when discharging (extracting) the electronic
circuit module.
[0044]
Although the arrangement positions of the signal input connector 51 and the signal output
connector 52 are arranged on the same side of the box-like housing 55, they may be arranged on
different sides. Further, instead of the signal input connector 51 and the signal output connector
52, the input cable 35 and the output cable 36 as shown in FIG. 2B may be employed.
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[0045]
According to the third embodiment, the user can replace the electronic circuit module as a socalled cartridge with one touch quickly and easily. Thus, one of the plurality of electronic circuit
modules is selectively inserted in the input end, the output end or the input / output signal path
of the audio equipment to which the sound quality conversion device 10c is connected.
[0046]
FIG. 5 shows a specific configuration example of the electronic circuit module. The electronic
circuit module 20 includes a housing 23, a substrate 24 housed in the housing 23, and an input
connector 21 and an output connector 22 provided on one side of the housing 23. An electronic
circuit is mounted on the substrate 24. The electronic circuit is connected to the input connector
21 and the output connector 22. This electronic circuit module 20 can also function as the sound
quality conversion device 10c in the third embodiment shown in FIG.
[0047]
The input connector 21 and the output connector 22 may be integrated into a single connector
such as the input / output connector 42 of FIG. Although the frame-like structure which exposed
the board | substrate 24 is shown as the housing | casing 23, you may be a box-like structure.
When the input connector 21 and the output connector 22 are directly connected to the
substrate 24, the housing 23 may be omitted. In addition, if the number of parts is small, there is
no need to use a substrate such as the substrate 24.
[0048]
FIGS. 6A, 6B, and 6C show examples of the circuit configuration of an electronic circuit module
composed of passive elements, which can be used in all the embodiments of the present
invention. The same reference numerals are given to the same elements or parts, and duplicate
explanations are omitted. These circuits 240a to 240c are configured by a combination of a
plurality of passive elements (only). In the circuit 240 a shown in FIG. 6A, resistors 242 and 243
and capacitors 244 and 245 are used as passive elements. Specifically, the resistor 242 and the
capacitor 244 are connected in series between the terminal 241a and the terminal 246a. The
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terminal 241 b and the terminal 246 b are directly connected (shorted). A resistor 243 and a
capacitor 245 are connected in series between the terminal 246a and the terminal 246b. The
passive element may be a variable element. In this example, the resistor 242 is a variable
resistor. By providing an operation unit (not shown) such as a volume that allows the user to
adjust the variable element, even in the same electronic circuit module, it is possible to change
the sound quality within a certain range. The circuit 240 b illustrated in FIG. 6B has a
configuration in which a coil (inductor) 247 is further connected in series to the resistor 242 and
the capacitor 244 connected in series. The other configuration is the same as the circuit 240a. In
the circuit 240 c shown in FIG. 6C, the resistor 248 and the capacitor 249 are connected in
parallel between the terminal 141 a and the terminal 246 a. Only the resistor 243 is connected
between the terminal 246a and the terminal 246b.
[0049]
FIGS. 7A, 7B, and 7C show other circuit configurations of passive circuit electronic circuit
modules that can be used in all the embodiments of the present invention. Elements and parts
similar to those shown in FIG. 6 are assigned the same reference numerals, and duplicate
explanations are omitted. In the circuit 240d shown in FIG. 7A, only the capacitor 244 is
connected between the terminal 141a and the terminal 246a. Only the coil 251 is connected
between the terminal 246a and the terminal 246b. The circuit 240e shown in FIG. 7B is similar
to the circuit 240d, but a capacitor 245 is connected between the terminal 246a and the terminal
246b instead of the coil 251. The circuit 240f shown in FIG. 7C is similar to the circuit 240d, but
a resistor 248 is connected in place of the capacitor 244 between the terminal 246a and the
terminal 246b, and a terminal 246a and the terminal 246b are connected. A resistor 243 is
connected instead of the coil 251.
[0050]
FIG. 8 is a diagram showing an example of a circuit configuration of an electronic circuit module
including an active element that can be used in any of the embodiments of the present invention.
The circuit 240g of the electronic circuit module uses a transistor (in this example, a field effect
transistor (FET) 252) as an active element. Since a power supply is required to drive the active
element, power supply terminals 253 and 258 are provided in addition to the input terminal 241
and the output terminal 246. The gate (first terminal) of the FET 252 is connected to the input
terminal 214 a via the capacitor 251. The drain (second terminal) of the FET 252 is connected to
the power supply terminal 253. The source (third terminal) of the FET 252 is connected to the
output terminal 246 a via the capacitor 254. The source is also connected to the power supply
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terminal 258 through a resistor 257. The connection point of the capacitor 251 and the gate 252
is connected to the connection point of the input terminal 241 b and the output terminal 246 b
via a resistor 256. Note that the power supply of the electronic circuit module can be supplied
via any connector or cable from any of the audio equipment to which it is connected. In general,
a circuit including such an active element is intended for the operation such as amplification of a
signal, but in the present invention, the change in sound quality is mainly intended.
[0051]
The circuit configurations shown in FIGS. 6 (a) (b) (c), 7 (a) (b) (c) and FIG. 8 are merely examples,
and the types and number of passive elements and active elements used are as follows. The
constant (resistance value, capacitance value, etc.) and connection configuration are not limited
to those shown in the drawings, and various modifications are possible. Moreover, regarding the
description of "a plurality of electronic circuit modules having different circuit configurations" in
the present invention, the differences shown in FIGS. 6 (a) (b) (c), 7 (a) (b) (c) and FIG. It should
be noted that in addition to combinations of circuit elements of different types, those of different
circuit constants with the same connection configuration of the same kind of circuit elements
also correspond to “different circuit configurations”.
[0052]
FIG. 9 shows a specific application example of the sound quality conversion device 10c of FIG. 4
or a sound quality conversion device equivalent thereto. In this example, the sound quality
conversion device 10 c is interposed between the reproduction device 85 as the first audio
device 80 and the headphones 95 as the second audio device 90. One electronic circuit module
selected from the plurality of electronic circuit modules 40a to 40d having the connectors 42a to
42d is detachably mounted on the main body 50. Also in this configuration, it is assumed that the
user can use the electronic circuit module as a so-called cartridge and exchange it quickly and
easily with one touch.
[0053]
FIGS. 10 (a) and 10 (b) are explanatory views of a fourth embodiment in which the function of
the device main unit 50 of FIG. 4 is incorporated in the sound quality conversion device.
Although the electronic circuit module described above is provided in the form of being
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externally attached to the audio device, the electronic circuit module is provided in the form of
providing (that is, incorporating) the socket for detachably mounting the electronic circuit
module in the audio device itself. It is also good. That is, in this embodiment, the electronic circuit
module is inserted in the input / output signal path of the audio device. The audio device in this
case is, for example, a playback device such as a CD player or a recording device, a preamplifier,
a pre-main amplifier, a power amplifier, a speaker, or the like.
[0054]
FIG. 10A shows a schematic configuration of an acoustic device 800 incorporating a socket 830
for detachably mounting the electronic circuit module 40 as described in FIG. The socket 830
corresponds to the input / output connector 53 shown in FIG. 4 and is provided between the
main body portion 850 for realizing the function of the audio device 800 and the output portion
(for example, output connector) 820 thereof. The audio device 800 may or may not have the
input unit (e.g., input connector) 810. Therefore, the input unit 810 is shown by a broken line.
[0055]
FIG. 10B similarly shows a schematic configuration of an acoustic device 900 which incorporates
a socket 930 for detachably mounting the electronic circuit module 40. The socket 930
corresponds to the input / output connector 53 shown in FIG. 4 and is provided between the
main body 950 for realizing the function of the audio device 900 and the input portion (for
example, input connector) 910 thereof. The audio device 900 may or may not have the output
unit (e.g., output connector) 920. Therefore, the output unit 920 is shown by a broken line. For
example, if this configuration is applied to, for example, an active speaker as the audio apparatus
900, the sound quality can be easily converted at the stage of the speaker, which is the final
stage of the audio system.
[0056]
In the configuration of FIGS. 10A and 10B, it is not necessary to provide the signal input
connector 51 and the signal output connector 52 of the device body 50 shown in FIG. Further,
the sound quality can be changed quickly and simply by attaching and detaching the electronic
circuit module to the audio device. The socket may be provided in the form of a recess (slot)
having an opening exposed to the surface of the acoustic device.
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[0057]
In the first to third embodiments described above, if the electronic circuit of the electronic circuit
module is configured only with passive elements, a low-cost sound quality converter can be
realized with a simple configuration without the need for a power supply. Not requiring a power
supply is advantageous not only because the configuration of the sound quality conversion
device is simplified, but also, for example, in portable audio equipment, the battery life is not
deteriorated. However, the present invention does not necessarily exclude the use of the active
element. In addition to the passive element, an active element such as a vacuum tube or a
transistor may be used in the electronic circuit of the electronic circuit module. For example, in
the fourth embodiment, since it is built in an audio device, it is easy to use a power supply.
[0058]
As described above, according to the embodiment of the present invention, various sound quality
can be enjoyed only by replacing the electronic circuit module.
[0059]
Electronic circuit modules that change the sound signal obtained from the audio equipment
serving as the sound source to various sound quality that has been designed and adjusted in
advance are generally inexpensive and can be manufactured and mass-produced because widely
used parts are used.
With the widespread use of personal audio, it is possible to experience the sound quality of
various audio equipment simply and inexpensively by exchanging electronic circuit modules that
do not require adjustment or are easy to adjust, and create new product value in the audio
equipment industry. Can.
[0060]
Further, the sound quality provided by one electronic circuit module is determined by the circuit
elements contained therein, and although the sound quality can be adjusted, its range is narrow,
so that the sound quality of each electronic circuit module can be easily specified and recognized.
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[0061]
The sound quality conversion operation according to the present invention is performed by the
user exchanging the physical electronic circuit module with the hand, as compared with the
conventional case where the sound quality is changed by volume operation or operation on a
panel or screen. Since it does, selection operation of sound quality becomes intuitively easy to
understand.
[0062]
As mentioned above, although preferred embodiment of this invention was described, it is
possible to perform various deformation | transformation and changes other than having
mentioned above.
[0063]
10, 10a, 10b, 10c: sound quality converter 20: electronic circuit module 21: input connector 22:
output connector 23: housing 24: board 30: main body 31, 33: input connector 32, 34: output
connector 35, 37 ... Input cable 36, 38 ... Output cable 40, 40a, 40b, 40c, 40d ... Electronic circuit
module 41 ... Module body 42, 42a, 42b, 42c, 42d ... Input / output connector 50 ... Device body
51 ... Signal input connector 52 Signal output connector 53 Input / output connector 55 Housing
80, 90 Audio equipment 85 Playback equipment 95 Headphones 240 240 a 240 b 240 c 240 d
240 e 240 f Circuits 241 a 241 b Terminal 242 , 243 ... resistance 244, 245 ... capacitor 246 a,
24 b ... terminal 251 and 254 ... capacitor 252 ... field effect transistor (FET) 253,258 ... power
supply terminal 256, 257 ... resistor 800, 900 ... sound equipment 830, 930 ... socket 850,950 ...
body portion
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