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JP2014027577

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DESCRIPTION JP2014027577
Abstract: To provide a speaker system capable of outputting different sounds from a plurality of
speakers using one amplifier. SOLUTION: A plurality of speakers 4a to 4c, an amplifier 3 for
amplifying and outputting signals from a plurality of sound sources 7a and 7b to a plurality of
speakers 4a to 4c, opening and closing conduction between the speakers 4a to 4c and the
amplifier 3 The plurality of first switches 5a to 5c provided for each of the loudspeakers 4a to 4c,
and the plurality of second provided for each signal line connected to the sound sources 7a and
7b by opening and closing the conduction between the respective sound sources 7a and 7b and
the amplifier 3 The switches 6a to 6c, the optional first switches 5a to 5c of the plurality of first
switches 5a to 5c, and the optional second switches 6a to 6c of the plurality of second switches
6a to 6c are interlocked to perform opening / closing control And control means 2 for
performing. [Selected figure] Figure 1
スピーカシステム
[0001]
The present invention relates to a speaker system provided with a plurality of speakers.
[0002]
A conventional speaker system is, for example, disclosed in Patent Document 1.
In this speaker system, a plurality of speakers, which are terminal devices, are arranged for one
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1
main amplifier connected to a music source, and a feed line and a transmission line using an
optical fiber are connected between the main amplifier and the speaker. It is a thing.
[0003]
Japanese Patent Application Laid-Open No. 9-9386
[0004]
The conventional speaker system outputs the same sound from a plurality of speakers, and has a
problem that different sounds can not be output for each speaker.
[0005]
Then, this invention solves the said problem, and it aims at providing the speaker system which
can output a different sound from several speakers using one amplifier.
[0006]
The speaker system according to the present invention comprises a plurality of speakers, an
amplifier for amplifying and outputting signals from a plurality of sound sources to the plurality
of speakers, and a plurality of speakers provided for each of the speakers by opening and closing
conduction between the speakers and the amplifiers. And a plurality of second switches provided
for each signal line connected to the sound source by opening and closing the conduction
between the respective sound sources and the amplifier, and any first switch of the plurality of
first switches. And control means for interlocking with an arbitrary second switch of the plurality
of second switches to perform opening / closing control.
[0007]
By the above configuration, the present invention can achieve the intended purpose, and can
provide a speaker system that can output different sounds from a plurality of speakers using one
amplifier.
[0008]
BRIEF DESCRIPTION OF THE DRAWINGS The block diagram of the speaker system of 1st
Embodiment of this invention.
[0009]
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Hereinafter, a first embodiment of the present invention will be described based on the attached
drawings.
[0010]
The speaker system 1 according to the embodiment of the present invention includes a control
unit 2, an amplifier 3, a plurality of speakers 4a, 4b and 4c, and a plurality of first switches 5a,
5b and 5c provided for each of the speakers 4a to 4c, It mainly comprises a plurality of second
switches 6a, 6b, 6c provided to the sound sources 7a, 7b.
7a and 7b are sound sources of the sound output from the speaker system 1, 8a, 8b and 8c are
first signal lines connecting the amplifier 3 and the speakers 4a to 4c, and 9a, 9b and 9c are A
second signal line connecting the amplifier 3 and the sound sources 7a and 7b, and a storage
unit 10 stores data related to the sound output from the sound source 7b.
[0011]
The control means 2 is a microcontroller, which incorporates an information processing system
in a semiconductor chip.
The control unit 2 is connected to the plurality of first switches 5a to 5c and the plurality of
second switches 6a to 6c, and controls the opening and closing of the first and second switches
5a to 5c and 6a to 6c.
[0012]
The amplifier 3 is a digital amplifier for audio, which amplifies the signals output from the
respective sound sources 7a and 7b and outputs the amplified signals to the speakers 4a to 4c.
In the present invention, one amplifier 3 is provided.
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The amplifier 3 includes one input unit and one output unit, and the signals from the respective
sound sources 7a and 7b are collected into one input unit, and the signals output to the
respective speakers 4a to 4c are It is distributed from one output.
[0013]
The speaker 4 is, for example, a vehicle-mounted speaker 4 and is a general full-range speaker 4
capable of outputting a compact and reproducible frequency band of 5 cm or less at 160 Hz to
20 kHz and 80 dB or more.
[0014]
The first switch 5 is provided for each of the first signal lines 8a to 8c connecting the amplifier 3
and the speakers 4a to 4c, and includes a plurality of first switches 5a to 5c.
The first switches 5a to 5c open and close the conduction between the amplifier 3 and the
speakers 4a to 4c.
[0015]
The second switch 6 is provided for each of the second signal lines 9a to 9c connecting the
amplifier 3 and the sound sources 7a and 7b, and includes a plurality of second switches 6a to
6c.
The second switches 6a to 6c open and close the conduction between the amplifier 3 and the
respective sound sources 7a and 7b.
[0016]
The sound source 7a is an audio device such as a CD reproducing device or a radio, and the
sound source 7b is a vehicle control means provided in the vehicle, and in the present
embodiment, the two output ports respectively have second signal lines 9b and 9c and
Connected, the vehicle control means 7b can simultaneously output different alarm sounds from,
for example, two ports connected to the second signal lines 9b and 9c.
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[0017]
The storage unit 10 is a non-volatile storage unit such as an EEPROM, and the storage content is
data of an alarm sound output from the speakers 4 b and 4 c.
The alarm sound data are different types of alarm sounds.
[0018]
The control unit 2 interlocks the first switches 5a to 5c and the second switches 6a to 6c to open
and close at high speed.
For example, the first switch 5a and the second switch 6a are closed together, the other switches
5b, 5c, 6b, 6c are opened, and the first switch 5b and the second switch 6b are closed together,
the other switch 5a, 5c, 6a, 6c are opened, the first switch 5c and the second switch 6c are closed
together, and the other switches 5a, 5b, 6a, 6b are opened.
[0019]
According to the above configuration, the speaker system 1 causes the speaker 4a to emit a
signal of the sound source 7a by closing the first switch 5a and the second switch 6a together
and opening the other switches 5b, 5c, 6b and 6c. Can.
Further, by closing the first switch 5b and the second switch 6b together and opening the other
switches 5a, 5c, 6a, 6c, the speaker 4b is made to emit a signal of the sound source 7b via the
second signal line 9b. Can. Further, by closing the first switch 5c and the second switch 6c
together and opening the other switches 5a, 5b, 6a, 6b, the speaker 4c is made to emit a signal of
the sound source 7b via the second signal line 9c. Can.
[0020]
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For example, the second switch 6a provided between the sound source 7a and the amplifier 3
and the first switch 5a provided between the speaker 4a and the amplifier 3 are closed for a fixed
time and connected, and the signal from the sound source 7a from the speaker 4a is Output.
After that, the second switch 6a and the first switch 5a were immediately opened and
disconnected, and the second switch 6b and the first switch 5b were similarly closed and
connected for a predetermined time, and the speaker 4b was connected to the second signal line
9b. The signal from the sound source 7b is output. After that, the second switch 6b and the first
switch 5b were immediately opened and disconnected, and the second switch 6c and the first
switch 5c were similarly closed and connected for a fixed time, and the speaker 4c was
connected to the second signal line 9c. The signal from the sound source 7b is output.
Thereafter, the switching of the first switches 5a to 5c and the second switches 6a to 6c is
repeated until an arbitrary warning sound is finished.
[0021]
By quickly switching between the first switches 5a-5c and the second switches 6a-6c, the signal
of the plurality of sound sources 7a, 7b can be simultaneously transmitted from the plurality of
speakers 4a-4c corresponding thereto using one amplifier 3. The driver can be made to recognize
as outputting.
[0022]
The speeds of the first switches 5a to 5c and the second switches 6a to 6c for switching the
connection between the speakers 4a to 4c and the amplifier 3 will be described.
[0023]
Also, since the expressible pitch is half the sampling frequency, sampling is performed at twice
the frequency of the sound to be reproduced.
For example, when reproducing a sound including a frequency up to 20 kHz, sampling may be
performed at a frequency of 40 kHz or more, and when reproducing a sound including a
frequency up to 10 kHz, sampling may be performed at a frequency higher than 20 kHz. Good.
However, the frequency band that can actually be heard by the human ear is said to be 20 to 20
kHz. Therefore, even if a sound of 20 kHz or more is cut off, it does not affect as a warning
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sound, so the warning sound has a frequency band of 20 kHz or less. For example, in the case of
reproduction with sampling at 44.1 kHz, 1/44100 = 0.022675 ms is obtained, and sound can be
reproduced without discomfort by continuously reproducing 0.022675 ms for one sound. Switch
the speakers 4a, 4b and 4c of the output destination for each sound at this interval
[0024]
In addition, when outputting sounds equal to or less than the number of installed speakers 4a to
4c, the first switch and the second switch of unused speakers may be skipped, and sound may be
output only from the speakers 4a to 4c desired to be output. .
[0025]
Further, the positions where the speakers 4a to 4c are installed are installed at the most effective
position, for example, in the vicinity of the warning object related to the alarm sound, in order to
make the driver aware.
For example, in the case of a side brake, if it is desired to provide a warning that the side brake
has not been released, install speakers 4a to 4c in the vicinity of the side brake to notify that it is
a side brake warning without looking at the side brake. Can. Also, when the vehicle is started
with no seat belt attached, the speakers 4a to 4c are similarly installed near the seat belt. In
addition, when the vehicle is started in the half door state, it is possible to notify which door is in
the half door state by installing the speakers 4 a to 4 c on the individual doors. As described
above, by installing the speakers 4a to 4c at positions related to the content of the alarm, the
alarm sound can be heard from the target to be warned.
[0026]
Sound data to be reproduced is other than sound of only a single frequency. Using a single
frequency sound, such as 800 Hz, makes it difficult to understand the position of the sound.
Therefore, when a plurality of sounds are emitted simultaneously, it can not be judged instantly
from which position the warning sound is generated, which is not preferable as a warning sound.
It is desirable to use a sound that includes as wide a frequency band as possible in the range of
160-20 kHz. (There is no limitation to the sound to be output, but it is desirable to make the
sound as short as possible within 1 second, because it is intended to be noticed instantly. If you
warn in a word, "Please release the side brake," you will not be able to make a judgment until you
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hear it completely, and it will take longer than the sound within one second to operate. During
driving, even when traveling at 40 km / h, it travels approximately 11.1 m in 1 second, so it is
intended to give a short warning even in 1 second. In that respect, if the sound is within one
second, it is possible to immediately judge what is being warned by position and sound. )
[0027]
The number of the speakers 4a to 4c does not have to be one, and the number of the speakers 4a
to 4c is arbitrary. For example, two speakers 4a to 4c may be provided.
[0028]
In addition, by causing the first switches 5a to 5c to interlock, that is, closing the first switches 5a
and 5b together, the same sound is output from the two speakers 4a and 4b. It is possible to
output as if a sound is being emitted from between (the position where the speaker is not
actually installed).
By configuring as described above, the apparent generation position of the sound can be
increased to the number of the speakers 4a to 4c or more.
[0029]
In addition, it is possible to change the position to be heard between the speakers 4a and 4b by
providing a difference in volume to be output from the two speakers 4a and 4b.
[0030]
According to the above, in order to output different sounds from the plurality of speakers 4a to
4c at one time, the same number of amplifiers for the types of sound or amplifiers with the same
number of inputs / outputs are required. If the number is one, and one amplifier is used to output
different sounds from the plurality of speakers 4a to 4c, the power consumption can be
suppressed and the space can be reduced by making the amplifier 3 one, By outputting different
sounds from the speakers 4a to 4c, different sounds can be simultaneously output to the vehicle
driver.
[0031]
In the present invention, three speakers 4a to 4c are provided, but the present invention is not
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limited to three and is optional.
[0032]
The present invention is applicable to a speaker system provided with a plurality of speakers.
[0033]
DESCRIPTION OF SYMBOLS 1 Speaker system 2 Control means 3 Amplifier 4a, 4b, 4c Speaker
5a, 5b, 5c 1st switch 6a, 6b, 6c 2nd switch 7a Sound source (audio equipment) 7b Sound source
(vehicle control means) 8a, 8b, 8c 1st Signal line 9a, 9b, 9c second signal line 10 storage unit
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