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JP2007006138

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DESCRIPTION JP2007006138
The present invention provides a speaker device suitable for a karaoke device that suppresses
the gain of a speaker other than a speaker close to a wireless microphone. SOLUTION: An
enclosure is equipped with a speaker and a wireless microphone reception means, an input signal
cable and an output signal cable are connected, a speaker driven by an audio signal from the
input signal cable and emitted, and a wireless microphone A signal capturer capable of capturing
a wireless signal, a receiving circuit for receiving and demodulating a captured wireless signal
and outputting an audio signal, and a strength for detecting a received signal strength of the
captured wireless signal and outputting a received strength signal A speaker device is provided
with a detection circuit, and a multiplexing circuit that multiplexes an audio signal from the
receiving circuit and a reception intensity signal from the intensity detection circuit and leads out
to the output signal cable. [Selected figure] Figure 2
Speaker device for wireless microphone loudspeaker system
[0001]
The present invention relates to a speaker device suitable for being applied to a karaoke
apparatus installed in a restaurant where a plurality of customer service zones are divided gently.
[0002]
In general, a wireless microphone loudspeaker system provided with a large number of speaker
devices is used, for example, by interspersingly installing the speaker devices in a wide lecture
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hall.
The voice of the lecturer through the wireless microphone is output in the same manner from
any speaker device so as to reach every corner of the venue. Japanese Patent Application LaidOpen No. 2002-78037 also discloses a wireless microphone loud-speaking device capable of
adjusting the volume and the sound quality according to the use environment of the wireless
microphone. Japanese Patent Laid-Open No. 2002-78037
[0003]
In the karaoke apparatus, the voice sang toward the wireless microphone is mixed with the
karaoke accompaniment music and output as sound from the speaker. For example, in a store of
a type of business like a karaoke snack, all customers in the store share one karaoke apparatus,
and the same karaoke accompaniment music and singing voice are emitted in the store in a
uniform manner. In such a store, various customers who come to the store in various individuals
and groups are scattered in the store, but while you are singing karaoke, while others are singing
karaoke, it is also in the store In the same way, karaoke performance and singing voice are
emitted. However, if you or someone else is singing you can still be painful if you can not be
addicted to conversations with friends if you hear the song of an stranger like you as a party.
[0004]
Therefore, even when sharing the karaoke space with other people, while the other person is
singing, the singing voice is emitted only in the vicinity of the singer itself, otherwise it is sung to
about BGM. When the volume is suppressed, it is convenient without being offensive.
[0005]
A typical wireless microphone transmits a signal using electromagnetic waves such as
microwaves or infrared rays as a carrier wave.
In the former type, the microwave antenna is a signal capturer, and in the latter type, an infrared
sensor is a signal capturer. In either type, the closer the wireless microphone that emits the
transmission signal to a signal capture device (an antenna or an infrared sensor, but
representatively, an antenna), the larger the reception strength by the antenna. That is, the
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smaller the distance between the antenna and the wireless microphone, the larger the reception
strength by the antenna. The inventor of this application noticed that when the antenna was
placed on the side of the speaker focusing on the above fact, the smaller the distance between
the speaker and the wireless microphone, the greater the received intensity by the antenna. This
idea was developed to create the present invention.
[0006]
Therefore, the speaker device for the wireless microphone loudspeaker system according to the
present invention is specified by the following items (1) to (7). (1) The enclosure is equipped with
a speaker and wireless microphone reception means, and it is a speaker device to which an input
signal cable and an output signal cable are connected (2) The speaker is driven by an audio
signal from the input signal cable Emitting sound (3) the wireless microphone receiving means
comprises a signal capturer, a receiving circuit, an intensity detection circuit, and a multiplexing
circuit (4) the signal capturer captures a wireless signal from the wireless microphone Possible
(5) The receiving circuit receives and demodulates the captured radio signal and outputs an
audio signal (6) The strength detection circuit detects the received signal strength of the
captured radio signal and receives the received strength Outputting a signal (7) The multiplexing
circuit multiplexes the voice signal from the receiving circuit and the reception strength signal
from the strength detection circuit and outputs an output signal cable It is derived
[0007]
In the present invention, it is desirable that the signal capturer be a microwave antenna or an
infrared sensor.
[0008]
Since this speaker device is provided with a wireless microphone receiver integrally with the
speaker, it is configured to know the reception intensity from the wireless microphone at the
installation location of the speaker device.
Moreover, it can be easily connected by a cable to an audio device such as a karaoke device.
Therefore, for example, when this speaker device is applied to a karaoke device, it is possible to
highlight the sound output when the reception intensity from the wireless microphone is high,
and to suppress the amount of sound from the wireless microphone when the reception intensity
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is low. . Then, if a large number of the speaker devices are connected to one karaoke device and
scattered in the store, it is possible to clearly hear the audio input to the wireless microphone
only from the speaker device close to the wireless microphone. Therefore, even when sharing the
karaoke space with other people, it is possible to share the karaoke space gently, avoiding that
the singing voice is disturbed by the other people. In addition, since the karaoke performance is
continued as BGM, the atmosphere in the store does not significantly change, and in that respect
it is possible to share the karaoke space gently.
[0009]
=== Configuration of Speaker Device === The speaker device according to this embodiment is
configured by a substantially rectangular enclosure as the external appearance is illustrated in
FIG. 1. Further, FIG. 2 exemplifies the schematic block configuration. The speaker device 1
includes an antenna 2, a reception demodulation circuit 3, a reception strength detection circuit
4, a multiplexing circuit 5 and a speaker 6. That is, the speaker device 1 is integrally provided
with a wireless microphone receiver for receiving and demodulating a wireless signal from the
wireless microphone.
[0010]
The antenna 2 receives a radio signal from a wireless microphone. The reception demodulation
circuit 3 demodulates and amplifies a signal received by the antenna 2 and outputs an audio
signal. The reception strength detection circuit 4 detects the reception strength by the antenna 2
and outputs a reception strength signal obtained by digitizing this. The multiplexing circuit 5
multiplexes the voice signal output from the reception demodulation circuit 3 and the reception
strength signal output from the reception strength detection circuit 4 and outputs the
multiplexed signal.
[0011]
An antenna 2 and a speaker 6 are disposed in the same plane on the front surface of the
enclosure when the speaker device 1 of this embodiment is installed. Also, from the back of the
enclosure, an audio signal output plug for leading from the output terminal of the multiplexing
circuit 5 to the audio input terminal of the external audio device is drawn out by a microphone
cable, and is led from the speaker 6 to the audio output terminal of the external audio device The
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speaker cable is pulled out and the power plug connected to the commercial power outlet is
pulled out by the cable.
[0012]
=== Example of Application to Karaoke Device === The speaker device 1 according to the present
invention can be suitably applied to the design concept by applying it to the karaoke equipment
of the following restaurant. In a large store of a certain restaurant, a large store space is divided
gently into a large number of customer service zones, and the space is shared as a whole. A
single karaoke device is disposed at the store, and a large number of speaker devices are
arranged to share each customer service zone so as to cover a large number of customer service
zones throughout. In this store, a large volume is not emitted from one stereo speaker to cause
the entire store to resonate, but a large number of customer service zones are shared by a large
number of speaker devices emitting a small volume. In addition, this speaker apparatus 1 is
easily applicable only by connecting with a karaoke apparatus by a cable.
[0013]
FIG. 3 shows the main part of the invention of the electrical system configuration of the karaoke
apparatus to which the speaker device 1 is applied. In this embodiment, four speaker devices 1a
to 1d are applied to a karaoke apparatus in order to simplify the description. The karaoke
apparatus is configured to include separation circuits 10a to 10d, selectors 11, and a distributor
12 in addition to the microcomputer 7, the music reproduction unit 8, and the mixing amplifiers
9a to 9d. Control to control the entire karaoke apparatus is performed by a main computer (not
shown).
[0014]
Each of the speaker devices 1a to 1d is connected to the karaoke device by a microphone cable
and a speaker cable, and for example, in a store which is gently divided into a plurality of
customer service zones such as a counter corner, a large sofa corner, a table seat corner and a
stage. It is distributed on the ceiling part etc. so as to share the customer service zone.
[0015]
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In FIG. 3, the music reproduction unit 8 plays stereo accompaniment music based on the karaoke
data of the requested music under control of the main computer.
Then, the music signal of the right channel is amplified by the mixing amplifiers 9a and 9c and
output to the two speaker devices 1a and 1c, and the music signal of the left channel is amplified
by the mixing amplifiers 9b and 9d to obtain the speaker device 1b, Output toward 1d.
[0016]
The karaoke apparatus is supplied with the aforementioned multiplexed signal output from the
four wireless microphone receivers incorporated in each of the speaker devices 1a to 1d. As
described above, this multiplexed signal is obtained by multiplexing an audio signal obtained by
receiving and demodulating a wireless microphone wireless signal and a signal indicating the
reception strength of the wireless signal. In each of the separation circuits 10a to 10d, the
multiplexed signal received from the wireless microphone receiver of each of the speaker devices
1a to 1d is separated into an audio signal and a reception strength signal, the audio signal is
input to the selector 11, and the reception strength signal is Input to the microcomputer 7.
[0017]
The microcomputer 7 compares the reception strength signals from the separation circuits 10a
to 10d with each other to determine which of the four wireless microphone receivers the
reception strength is the largest, and the wireless microphone reception showing the maximum
reception strength The selector 11 is controlled to select an audio signal from the device. Among
the audio signals from the four wireless microphone receivers, one audio signal designated by
the microcomputer 7 is selected and output from the selector 11 and supplied to the distributor
12.
[0018]
The distributor 12 is a 1-input 4-output multi-channel amplifier, and the gains of the four
amplifiers are individually controlled by signals from the microcomputer 7. The microcomputer 7
controls the gains of the four amplifiers in the distributor 12 as described below, based on the
reception intensity signals from the four wireless microphone receivers.
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[0019]
The four outputs of the distributor 12 are respectively input to four mixing amplifiers 9a to 9d,
and audio signals of accompaniment music from the music reproduction unit 8 and audio signals
of singing voice from the wireless microphone receiver selected by the selector 11 Are mixed and
amplified. The outputs of the four mixing amplifiers 9a to 9d are respectively supplied to the four
speaker devices 1a to 1d via the speaker cables and emitted from the speakers 6a to 6d.
[0020]
=== Gain Designation === The microcomputer 7 specifies the gains of the four amplifiers in the
distributor 12 based on the reception intensity signals from the four wireless microphone
receivers. For example, the amplifier connected to the speaker device 1 incorporating the
wireless microphone receiver and the amplifier connected to the other speaker devices 1
depending on which wireless microphone receiver received the maximum strength. The gain to
be specified is set in advance and stored in the memory 13. The combination of the designated
gains may be determined according to the arrangement of the speaker device 1.
[0021]
That is, for example, when the speaker device in which the wireless microphone receiver whose
reception intensity is shown is the maximum is 1a, the designated gain to the amplifier connected
to the speaker device 1a is set to 1. Then, the designated gain to the amplifier connected to the
speaker device 1b disposed in the vicinity of the speaker device 1a is 0.4, and the designated
gain to the amplifier connected to the other speaker devices 1c and 1d is 0.1. .
[0022]
In this way, the singing voice is emitted as it is from the speaker 6a near the wireless
microphone, and the singing voice emitted from the nearby speaker 6b is suppressed to less than
half. The singing voice is hardly emitted from the other speakers 6c and 6d. In other words, the
singing voice is output as it is only from the speaker 6a close to the singer, and the other
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speakers 6b to 6d suppress the singing voice according to the arrangement. Also in this case, the
karaoke accompaniment music is output unchanged from any of the speakers 6a to 6d.
Therefore, karaoke performance as BGM is continued even in a place away from the singer and
there is no concern that the atmosphere in the store will be greatly changed.
[0023]
Of course, the gain of each amplifier connected to the speaker devices 1a to 1d into which each
wireless microphone receiver is incorporated may be designated so as to be proportional to the
reception intensity of each wireless microphone receiver. In that case, since the singing voice is
appropriately suppressed according to the distance from the singing person of each of the
speaker devices 1a to 1d, it becomes possible to gently share the karaoke space as in the above
embodiment. .
[0024]
=== Other Embodiments === In the above embodiment, the gain is specified in the previous stage
of each of the mixing amplifiers 9a to 9b to suppress the volume of singing voice, but as another
method, each mixing amplifier 9a is used. The sound volume may be suppressed by designating a
gain in the output path of ~ 9d. In this case, since the gain is specified after mixing the singing
voice and the karaoke accompaniment music, the volume of the karaoke accompaniment music is
also suppressed together with the singing voice except for the speaker device 1 close to the
singer. become. Therefore, even for the speaker device 1 far from the singer, by setting the
designated gain to an appropriately small value rather than setting it to zero as much as possible,
it is possible to further suppress annoying sounds and share the karaoke space.
[0025]
The wireless system of the wireless microphone is not limited to the radio wave system such as
microwaves, and the infrared system is also applicable to the present invention. In that case, an
infrared sensor is applied to the wireless microphone receiver.
[0026]
Note that the commercial power supply cord can be omitted if the DC power supply is
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superimposed on the audio signal of the microphone cable and supplied without supplying the
commercial power supply to the speaker device.
[0027]
If commercial power is to be supplied, a power amplifier for driving the speaker 6 may be
incorporated in the speaker device, in which case the power amplifier circuit can be omitted from
the mixing amplifiers 9a to 9b, and instead of the speaker cable. Connect with audio signal cable.
[0028]
It is an external appearance perspective view of the speaker apparatus which concerns on a
present Example.
It is a functional block diagram of a speaker apparatus same as the above.
It is a functional block diagram of the karaoke apparatus which applied the speaker apparatus
same as the above.
Explanation of sign
[0029]
1 Speaker device 2 Antenna 3 Reception demodulation circuit 4 Reception strength detection
circuit 5 Multiplexing circuit 6 Speaker
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