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JP2003125480

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DESCRIPTION JP2003125480
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
"speaker device compatible with environmental changes" which corrects acoustic characteristic
changes corresponding to changes in temperature and / or humidity of a speaker installation
environment.
[0002]
2. Description of the Related Art Generally, to reproduce and emit sound using a speaker device,
for example, as shown in FIG. 10, a CD reproduction signal and an MD reproduction signal of a
player 1 are amplified by a preamplifier 2 and then power is generated by a power amplifier 3.
The high frequency component signal is amplified and supplied to the tweeter 4, and the low
frequency component signal is supplied to the woofer 5.
[0003]
As another example of a two-way speaker using the tweeter 4 and the woofer 5, one full-range
unit may constitute a speaker, or three or more units may constitute a speaker.
[0004]
The preamplifier 2 has a digital signal processor (DSP) and an equalizer (EQ) function, so that it
has a flat listening characteristic corresponding to the form of the reproduction signal and the
acoustic characteristic of the room in which the speaker device is installed. Can be adjusted to
the desired acoustic characteristics.
08-05-2019
1
[0005]
Moreover, the sound emission characteristic in the unit of the tweeter 4 and the woofer 5 which
comprise 1 set of speakers changes with the environmental temperature and environmental
humidity in which it is installed.
In order to eliminate such a change, it is sufficient to adjust the sound so as to cancel out the
change using the above-mentioned preamplifier 2. However, it is very complicated for the user to
make such adjustment every time the environment changes. You need to do some
[0006]
In the conventional speaker device, when the acoustic characteristics are changed due to changes
in temperature and humidity in the installation environment, although it is necessary for the user
to make manual adjustments, the temperature and The compensation characteristic
corresponding to the change of humidity is largely different from the equalizer curve for normal
tone adjustment, and the graphic equalizer type circuit which can be increased / decreased by
many frequency points can not be used to execute the compensation completely. In addition,
after performing the complicated operation and performing the compensation, it is necessary to
adjust the sound quality of the source type and the user preference, in other words, a
characteristic in which the sound quality adjustment characteristic of the user preference is
added to the compensation characteristic by temperature and humidity. Adjustment, and the
adjustment also changes greatly depending on the temperature and humidity. It is of equal status
quo in not doing the compensation due.
[0007]
Therefore, it is an object of the present invention to be able to automatically compensate when
there is a change in temperature and / or humidity, and to cope with environmental changes in
which the compensation can be made to correspond to a wide variety of speakers To provide a
speaker device of
[0008]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a speaker
device compatible with environmental changes according to the present invention adopts a
characteristic configuration as described below.
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2
[0009]
(1) A speaker device compatible with environmental changes that corrects acoustic characteristic
changes corresponding to changes in temperature and / or humidity of the speaker installation
environment, and a sensor unit that detects temperature and / or humidity in the speaker
installation environment; A data storage unit in which correction data for correcting a change in
acoustic characteristics due to temperature and / or humidity in the speaker installation
environment is stored, and of the correction data stored in the data storage unit, the sensor unit
A speaker device compatible with environmental changes, comprising: a correction control unit
that takes out data corresponding to detected installation environment data and corrects the
acoustic characteristics of the speaker based on the taken out data.
[0010]
(2) A speaker device compatible with environmental changes, wherein the correction data in the
data storage unit of (1) is data for continuously correcting changes in acoustic characteristics due
to temperature and / or humidity in the speaker installation environment.
[0011]
(3) The data for correction in the data storage unit of the above (1) is data for correcting acoustic
characteristic changes due to temperature and / or humidity in the speaker installation
environment in accordance with a plurality of stages. Speaker device.
[0012]
(4) The correction data in the data storage unit of the above (1) is constituted by a data table
corresponding to each of a plurality of sets of speakers, and the correction control unit is
configured of the data table stored in the data storage unit. A speaker device compatible with
environmental changes, configured to extract data corresponding to a mounted speaker from the
inside and correct the acoustic characteristic of the speaker based on the extracted data.
[0013]
(5) The correction data in the data storage unit of (1) is formed of a data table corresponding to
each of a plurality of speaker units having divided reproduction bands, and the correction control
unit is configured to A speaker device compatible with environmental changes, configured to
take out data corresponding to a mounted speaker unit from a data table stored in and to correct
acoustic characteristics of the speaker based on the taken out data.
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[0014]
(6) A speaker device compatible with environmental changes, wherein the correction control unit
of (1) is configured to perform correction control using the sound quality adjustment unit of the
signal amplification unit.
[0015]
(7) The speaker installation environment in any one of said (1) thru | or said (6) is an
environmental change-compatible speaker apparatus installed in the vehicle.
[0016]
(8) A speaker device compatible with environmental changes, wherein the sensor unit of (7) is a
temperature and / or humidity sensor of an air conditioner mounted on a vehicle.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described in detail with reference to the drawings.
First, the first embodiment will be described with reference to FIGS. 1 to 5.
In this embodiment, the present invention is applied to an example in which the speaker device is
configured as a car audio as shown in FIG. 1 and connected to an electronic circuit provided in
the vehicle via the control signal line L. is there.
[0018]
The circuit configuration is such that the output end of the player 1 for selectively outputting the
CD reproduction signal and the MD reproduction signal as shown in FIG. 1 is connected to the
input end of the power amplifier 3 via the preamplifier 7. The tweeter 4 is connected to the high
band signal output end of the amplifier 3 and the woofer 5 is connected to the low band signal
output end.
[0019]
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4
Since the preamplifier 7 has a digital signal processor (DSP) and an equalizer (EQ) function, it has
a flat listening characteristic corresponding to the form of the reproduction signal and the
acoustic characteristic of the room in which the speaker device is installed. Can be adjusted to
the desired acoustic characteristics.
[0020]
The data storage unit 8 is connected to such a preamplifier 7, and control corresponding to
environmental changes (details will be described later) is performed based on a control command
from the microcomputer 6.
That is, correction data for correcting a change in acoustic characteristics due to temperature
and / or humidity in the installation environment of the speaker consisting of the tweeter 4 and
the woofer 5 is stored in the data storage unit 8 and this correction data is also stored. Are data
(described in detail later) for continuously correcting acoustic characteristic changes due to
temperature and / or humidity in a speaker installation environment.
[0021]
The ECU 9 connected to the microcomputer 6 through the control signal line L is an electronic
control unit, and is for controlling each part of the vehicle, and each of the temperature sensor
10 and the humidity sensor 11 that constitute the sensor unit An output is inputted and the air
conditioner controller 12 is controlled.
[0022]
From the correction data stored in the data storage unit 8, data corresponding to the installation
environment data detected by the sensor unit including the temperature sensor 10 and the
humidity sensor 11 is extracted, and based on the extracted data, The correction control unit that
corrects the acoustic characteristics is mainly configured by the "microcomputer 6, the
preamplifier 7, the data storage unit 8".
[0023]
The state of data storage in the data storage unit 8 is correction data corresponding to the
following first to fourth four speaker types.
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[0024]
The first speaker type is a speaker type using a full range diaphragm of a paper system, and as
shown in FIG. 2, the characteristics of the frequency f and the output P indicate the solid line
shown in the standard characteristic a corresponding to the standard humidity. The correction
characteristic for compensating the characteristic of the solid line is a characteristic indicated by
a broken line.
[0025]
The maximum characteristic in the increasing direction (+ direction) of the humidity is the high
humidity characteristic b with the standard characteristic a as a boundary.
The solid line of the high humidity characteristic b is the humidity change characteristic, and the
broken line is the compensation characteristic. As the humidity increases, the low band side is
changed to become the standard characteristic a to the high humidity characteristic b. It is
possible to obtain a substantially flat compensated characteristic by gradually decreasing and
gradually increasing the high frequency side and changing it continuously.
[0026]
On the other hand, the maximum characteristic in the decreasing direction of humidity (−
direction) at the boundary of the standard characteristic a is the low humidity characteristic c.
The solid line of this low humidity characteristic c is the humidity change characteristic, and the
broken line is the compensation characteristic. As the humidity decreases, the low band side is
gradually changed so that the standard characteristic a to each of the low humidity characteristic
c will It is possible to obtain a substantially flat compensated characteristic by gradually
increasing the middle band and gradually changing the high band side so as to be substantially
unchanged.
[0027]
The second speaker type is a two-way speaker type in which a paper-system diaphragm is used
for the woofer 5 and a soft dome is used for the tweeter 4. As shown in FIG. Is the characteristic
of the solid line shown in the standard characteristic d corresponding to the standard humidity,
08-05-2019
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and the characteristic for correction for compensating the characteristic of the solid line is the
characteristic shown by the broken line.
[0028]
The maximum characteristic in the increasing direction (+ direction) of the humidity is the high
humidity characteristic e at the boundary of the standard characteristic d.
The solid line of the high humidity characteristic e is the humidity change characteristic, and the
broken line is the compensation characteristic. As the humidity increases, the low band side is
changed to the standard characteristic d to the high humidity characteristic e. It is possible to
obtain a substantially flat compensated characteristic by changing it gradually so as to make the
middle region substantially invariable and gradually increase the high region side.
[0029]
On the other hand, the maximum characteristic in the decreasing direction (− direction) of the
humidity is the low humidity characteristic f with the standard characteristic d as a boundary.
The solid line of the low humidity characteristic f is the humidity change characteristic, and the
broken line is the compensation characteristic. As the humidity decreases, the low band side is
gradually changed to have the standard characteristic d to the low humidity characteristic f. It is
possible to obtain a substantially flat compensated characteristic by continuously changing it so
as to increase and make the middle region substantially invariable and gradually decrease the
high region side.
[0030]
The third speaker type is a 2-way speaker type in which a synthetic resin diaphragm such as
polypropylene is used for the woofer 5 and a soft dome is used for the tweeter 4. As shown in
FIG. The characteristic of the output P is the characteristic of the solid line shown in the standard
characteristic g corresponding to the standard humidity, and the correction characteristic for
compensating the characteristic of the solid line is the characteristic shown by the broken line.
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[0031]
The maximum characteristic in the increasing direction (+ direction) of the humidity is the high
humidity characteristic h with the standard characteristic g as a boundary.
The solid line of the high humidity characteristic h is the humidity change characteristic, and the
broken line is the compensation characteristic, and the low band side is made to have the
standard characteristic g to the high humidity characteristic h as the humidity increases. It is
possible to obtain a substantially flat compensated characteristic by changing it gradually so as
to make the middle region substantially invariable and gradually increase the high region side.
[0032]
On the other hand, the maximum characteristic in the decreasing direction of humidity (−
direction) with the standard characteristic g as a boundary is the low humidity characteristic i.
The solid line of the low humidity characteristic i is the humidity change characteristic, and the
broken line is the compensation characteristic. As the humidity decreases, the standard
characteristic g to the low humidity characteristic i become substantially flat and low. The
substantially flat compensated characteristic can be obtained by continuously changing the high
region so as to make a slight change.
[0033]
The fourth speaker type is a 2-way speaker type in which a diaphragm made of a synthetic resin
such as polypropylene is used for the woofer 5 and a hard dome is used for the tweeter 4. As
shown in FIG. The characteristic of the output P is the characteristic of the solid line shown in the
standard characteristic j corresponding to the standard humidity, and the characteristic for
correction for compensating the characteristic of the solid line is the characteristic shown by the
broken line.
[0034]
The maximum characteristic in the increasing direction (+ direction) of the humidity is the high
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8
humidity characteristic k with the standard characteristic j as a boundary.
The solid line of the high humidity characteristic k is the humidity change characteristic, and the
broken line is the compensation characteristic. As the humidity increases, the low band side is
changed from the standard characteristic j to the high humidity characteristic k. It is possible to
obtain a substantially flat compensated characteristic by making a slight decrease, slightly
increasing the mid band, and continuously changing the high band side to be substantially
invariable.
[0035]
On the other hand, the maximum characteristic in the decreasing direction of humidity (−
direction) at the boundary of the standard characteristic j is the low humidity characteristic m.
The solid line of this low humidity characteristic m is the humidity change characteristic, and the
broken line is the compensation characteristic. As the humidity decreases, the low band side is
slightly so that the compensation characteristics of standard characteristic j to low humidity
characteristic m are obtained. It is possible to obtain a substantially flat compensated
characteristic by continuously changing so as to gradually increase the high frequency band so
as to gradually decrease the high frequency side.
[0036]
Thus, by selecting data stored in the data storage unit 8 using a switch or the like not shown
corresponding to the mounted speaker format, the environmental humidity of the mounted
speaker automatically follows the change Humidity compensation can be performed.
[0037]
Although four types of correction data corresponding to four speaker types are stored in the data
storage unit 8 in this embodiment, it is needless to say that the number can be set arbitrarily.
[0038]
Next, a second embodiment of the present invention will be described using FIG. 6 to FIG.
08-05-2019
9
While the first embodiment described above continuously corrects in response to changes in
humidity, this embodiment corresponds to changes in acoustic characteristics due to changes in
humidity in a speaker installation environment in a plurality of stages. This is an example of
stepwise correction.
[0039]
In this specific configuration, the contents of data stored in the data storage unit 8 of the circuit
configuration shown in FIG. 1 are changed, and the acoustic characteristics of the speaker
constituted by “microcomputer 6, preamplifier 7, data storage unit 8” are corrected. The
operation of the correction control unit is different, and the others are similar.
[0040]
That is, the data contents stored in the data storage unit 8 are data corresponding to the
following first to fourth four speaker types.
[0041]
The first speaker type is a speaker type using a full range diaphragm of a paper system, and as
shown in FIG. 6, the characteristics of the frequency f and the output P are five data
corresponding to the standard humidity. The standard characteristic A0 corresponding to the
standard value of the humidity is a characteristic shown by a solid line, and a correction
characteristic for compensating the characteristic of the solid line is a characteristic shown by a
broken line.
[0042]
In addition to the standard characteristic A0, there are data of the first high humidity
characteristic A1 and the second high humidity characteristic A2 corresponding to the increase
in humidity, and the first low humidity characteristic A3 and the second corresponding to the
decrease It has low humidity characteristics A4.
This characteristic has the humidity midpoint of the characteristic shown in FIG. 2 described
above as data, and these five data are selected based on the result detected by the humidity
sensor 11 and used, according to the environmental humidity. A substantially flat compensated
08-05-2019
10
characteristic can be obtained by performing the correction in steps (five steps).
[0043]
The second speaker type is a 2-way speaker type in which a paper-system diaphragm is used for
the woofer 5 and a soft dome is used for the tweeter 4. As shown in FIG. Is the five data
corresponding to the standard humidity, and the standard characteristic B0 corresponding to the
standard value of the humidity is the characteristic shown by the solid line, and for correction for
compensating the characteristic of the solid line The characteristic is indicated by a broken line.
[0044]
In addition to the standard characteristic B0, there are data of the first high humidity
characteristic B1 and the second high humidity characteristic B2 corresponding to the increase
in humidity, and the first low humidity characteristic B3 and the second corresponding to the
decrease It has a low humidity characteristic B4.
This characteristic has the humidity midpoint of the characteristic shown in FIG. 3 described
above as data, and these five data are selected based on the result detected by the humidity
sensor 11 and used, according to the environmental humidity. A substantially flat compensated
characteristic can be obtained by performing the correction in steps (five steps).
[0045]
The third speaker type is a 2-way speaker type in which a synthetic resin diaphragm such as
polypropylene is used as the woofer 5 and a soft dome is used as the tweeter 4. As shown in FIG.
The characteristic of the output P is five data corresponding to the standard humidity, and the
standard characteristic C0 corresponding to the standard value of the humidity is the
characteristic shown by the solid line, and the characteristic of the solid line is compensated The
correction characteristic for this is a characteristic shown by a broken line.
[0046]
In addition to the standard characteristic C0, there is data of the first high humidity characteristic
C1 and the second high humidity characteristic C2 corresponding to the increase in humidity,
and the first low humidity characteristic C3 and the second corresponding to the decrease It has
08-05-2019
11
a low humidity characteristic C4.
This characteristic has the humidity midpoint of the characteristic shown in FIG. 4 described
above as data, and these five data are selected based on the result detected by the humidity
sensor 11 and used, according to the environmental humidity. A substantially flat compensated
characteristic can be obtained by performing the correction in steps (five steps).
[0047]
The fourth speaker type is a 2-way speaker type in which a diaphragm made of synthetic resin
such as polypropylene is used for the woofer 5 and a hard dome is used for the tweeter 4. As
shown in FIG. The characteristic of the output P is five data corresponding to the standard
humidity, and the standard characteristic D0 corresponding to the standard value of the humidity
is the characteristic shown by the solid line, and the characteristic of the solid line is
compensated The correction characteristic for this is a characteristic shown by a broken line.
[0048]
In addition to the standard characteristic D0, data of the first high humidity characteristic D1 and
the second high humidity characteristic D2 corresponding to when the humidity increases, and
corresponding to the first low humidity characteristic D3 and the second It has a low humidity
characteristic D4.
This characteristic has the humidity midpoint of the characteristic shown in FIG. 5 described
above as data, and these five data are selected based on the result detected by the humidity
sensor 11 and used, according to the environmental humidity. A substantially flat compensated
characteristic can be obtained by performing the correction in steps (five steps).
[0049]
In the present embodiment, five correction data corresponding to four speaker types are stored
in the data storage unit 8. However, it is a matter of course that the number can be set arbitrarily
and humidity change is also possible. It is a matter of course that the characteristic data for
correcting may be set and stored in the unit of a single unit, and the speaker unit to be actually
used may be selected to perform the humidity compensation.
08-05-2019
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[0050]
Further, not only in the case of compensating the acoustic characteristics according to the
change of the environmental humidity but also in the case of performing the compensation by
the change of the environmental temperature, the case of performing the compensation in
consideration of the change of both the environmental humidity and the environmental
temperature Of course, the present invention can be applied.
[0051]
As is apparent from the above description, the speaker device for environmental changes
according to the present invention can be manually operated by the user when the acoustic
characteristics change due to changes in temperature and humidity in the installation
environment. Since compensation corresponding to changes in temperature and humidity can be
performed automatically without adjustment, the equalizer circuit originally provided for sound
quality adjustment can be used freely only for desired sound quality adjustment. It is easy to use.
[0052]
Therefore, when there is a change in temperature and / or humidity, the "speaker device capable
of environmental change" can automatically perform the compensation and can perform the
compensation corresponding to a wide variety of speakers. Can be provided.
[0053]
Brief description of the drawings
[0054]
1 is a block circuit diagram showing a circuit configuration of a speaker device adapted to
environmental changes according to the first embodiment of the present invention.
[0055]
2 is a characteristic diagram conceptually showing the contents of data storage in the data
storage unit shown in FIG. 1 taking a case of a speaker type using a full range diaphragm of a
paper system as an example.
[0056]
The data storage content in the data storage unit shown in FIG. 1 is conceptually illustrated using
the example of the two-way speaker type in which a paper system diaphragm is used as the
08-05-2019
13
woofer and a soft dome is used as the tweeter. FIG.
[0057]
The data storage contents in the data storage section shown in FIG. 1 are exemplified by the case
of a 2-way speaker type in which a synthetic resin diaphragm such as polypropylene is used as
the woofer and a soft dome is used as the tweeter. It is a characteristic diagram shown
conceptually.
[0058]
The contents of data storage in the data storage section shown in FIG. 1 are exemplified by the
case of a two-way speaker type in which a diaphragm made of synthetic resin such as
polypropylene is used as the woofer and a hard dome is used as the tweeter. It is a characteristic
diagram shown conceptually.
[0059]
The data storage contents in the data storage unit of the loudspeaker apparatus compatible with
environmental changes according to the second embodiment of the present invention will be
conceptually described taking the case of a speaker system using a full-range diaphragm of a
paper system as an example. FIG.
[0060]
As the contents of data storage in the data storage unit of the loudspeaker apparatus compatible
with environmental changes according to the second embodiment of the present invention, a
paper system diaphragm is used as the woofer, and a soft dome is used as the tweeter 2 FIG. 7 is
a characteristic diagram conceptually showing an example of a way speaker type.
[0061]
As the contents of data storage in the data storage unit of the loudspeaker apparatus compatible
with environmental changes according to the second embodiment of the present invention, a
woofer made of a synthetic resin diaphragm such as polypropylene is used as a woofer, and a
soft dome is used as a tweeter. It is a characteristic view shown notionally taking the case of the
used 2 way speaker type as an example.
[0062]
As the contents of data storage in the data storage unit of the loudspeaker apparatus compatible
08-05-2019
14
with environmental changes according to the second embodiment of the present invention, a
synthetic resin diaphragm such as polypropylene is used as a woofer, and a hard dome is used as
a tweeter. It is a characteristic view shown notionally taking the case of the used 2 way speaker
type as an example.
[0063]
10 is a block circuit diagram showing a circuit configuration of an example of a conventional
speaker apparatus corresponding to environmental changes.
[0064]
Explanation of sign
[0065]
Reference Signs List 1 player 2 preamplifier 3 power amplifier 4 tweeter 5 woofer 6
microcomputer 7 preamplifier 8 data storage unit 9 ECU 10 temperature sensor 11 humidity
sensor 12 air conditioner controller
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