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JP2008109583

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DESCRIPTION JP2008109583
PROBLEM TO BE SOLVED: When an electric signal of voice is amplified and output as voice from
a speaker, and the microphone picks up the speaker voice to adjust the acoustic characteristic,
the voice picked up by the microphone is a speaker voice as a target of acoustic characteristic
adjustment Make sure that there is a certain adjustment to the correct acoustic characteristics.
SOLUTION: Connection confirmation parts 22 to 27 for confirming a connection by a pressing
force at the time of connecting a cable of a speaker to each of connection parts 16 to 21 to
speakers 34 to 39 are provided adjacently, and the connection is made The CPU 29 receives the
connection notification contents of the confirmation units 22 to 27, and the DSP 4 adjusts the
acoustic characteristics based on the determination result. [Selected figure] Figure 1
Acoustic amplifier
[0001]
The present invention can amplify the output level of the electrical signal relating to voice to a
desired value and output it to a speaker separate from the device main body, and process and
adjust the acoustic characteristics of the electrical signal relating to voice as desired. The present
invention relates to an acoustic amplification apparatus including adjustment means. In
particular, an electrical signal relating to the amplified voice is output to a speaker separate from
the device body, and the speaker converts the electrical signal into voice and outputs the voice,
and the microphone collects the output voice to produce electricity. An acoustic means
comprising adjustment means for converting into signals and processing and adjusting the
electric signal related to the output voice so as to have desired acoustic characteristics based on
the electric signal from the microphone obtained here. The present invention relates to an
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1
amplification device.
[0002]
When an electric signal related to the sound obtained by amplification by the sound amplification
device is sent to a speaker, and the speaker converts the electric signal to output the sound, the
sound output here is desired by the user It does not necessarily have acoustic characteristics. In
particular, in the case of using a plurality of speakers, the sound field formed by the output of
each speaker and the position of the arrangement largely differs, so that the desired sound field
is obtained for the electric signal to be amplified and output each time. It is necessary to make
adjustments to the acoustics to be able to
[0003]
The following publication is known as a technique for allowing a user to obtain an audio output
having an acoustic characteristic of desired content from a speaker by adjusting an electrical
signal related to a voice to be amplified and output. There is.
[0004]
JP 2000-354300 A
[0005]
In the above-described acoustic amplification device, the output electric signal is converted to
sound from the speaker and output, and the sound from the speaker is picked up by the
microphone and the electric signal obtained by picking up the microphone is the sound from the
speaker The configuration is the source of adjusting the acoustic characteristics according to the
above, that is, the configuration is such that the loop is configured to allow feedback.
However, in the invention of such a configuration, the effect can be recognized if the sound from
the speaker is based on the electrical signal from the acoustic amplification device, but if the
microphone erroneously picks up another sound, As a result, the acoustic characteristics can not
be adjusted correctly.
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[0006]
That is, if the cable for sending an electrical signal from the acoustic amplification device to the
speaker is disconnected, and the microphone picks up another voice, the other voice is the voice
from the speaker that is also targeted If it is received, the acoustic amplification device adjusts
the acoustic characteristics to the erroneous input speech, and as a result, the originally required
sound field can not be obtained indefinitely.
In particular, in the invention disclosed in Japanese Patent Application Laid-Open No. 2000354300, a specific sound field is configured by audio output from a plurality of speakers.
[0007]
In such a case, when the cable connection to the speaker for which adjustment of the acoustic
characteristics is to be disconnected is disconnected among the plurality of speakers, the
microphone is connected to the main body of the apparatus, and the remaining one with an
electrical signal input. Since only the sound from the speakers is picked up, the user
misunderstands that the detection of the acoustic characteristics including the sound from the
speaker to be measured is also performed, and all the original speakers are connected. It is
extremely unnoticeable that true detection has not been obtained, as a result the adjustment of
the correct acoustical properties of each speaker to all the speakers can not be made and the
problem becomes more serious. This invention is made in view of the above-mentioned
circumstances, amplifies the electric signal concerning a sound, outputs it to a speaker, the
speaker converts the electric signal into a sound and outputs it, and the microphone outputs the
sound. An acoustic amplification device for adjusting an acoustic characteristic related to an
electrical signal picked up based on an electrical signal from the microphone, wherein a voice
picked up by the microphone is definitely a target voice to be subjected to the adjustment of the
acoustic characteristic To provide an acoustic amplification device capable of adjusting the
acoustic characteristics correctly.
[0008]
The present invention is an acoustic amplification device configured to include means for
notifying whether or not a cable to a speaker to be detected is truly connected.
[0009]
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The detailed configuration includes an amplifying means for amplifying and outputting an
electric signal relating to voice as desired, an adjusting means for adjusting acoustic
characteristics of the electric signal output from the amplifying means, and an electric signal
from the amplifying means A connecting portion for connecting to a main body and a separate
speaker, and a cable for outputting an electric signal from the amplifying means to the speaker
are provided in the vicinity of the connecting portion and connected to the connecting portion.
When it is determined that the cable to the speaker is connected to the connection unit based on
the signal from the connection notification means, The microphone picks up the voice of the
voice, and detects the acoustic characteristic of the current output voice from the speaker based
on the electrical signal related to the voice picked up by the microphone, Control is performed to
obtain a desired acoustic characteristic based on the detection result, and when it is determined
that the cable to the speaker is not connected to the connection unit, control to notify that effect
An acoustic amplification device comprising means.
[0010]
Here, the acoustic characteristics specifically include what is called tone control of increase and
decrease of low-temperature sensation and increase and decrease of sharpness of the output
sound, and the kind of the related is by adjusting the gain for each frequency. It is possible to
control the acoustic properties.
Further, specifically, when the connection plug of the cable to the speaker is fitted and connected
to the connection portion, the connection notification means outputs a signal of the conductive
state based on the pressing force generated by the fitting, There is a configuration in which the
connection between the connection portion and the cable is detected by the output of this signal.
[0011]
In the present invention, when the connection of the cable for transmitting the electric signal
relating to the sound to the device main body and the speaker is released, the effect is reflected
in the control system and the notification means, thereby relating to the sound. The electric
signal is amplified and output to the speaker, and the speaker converts the electric signal into a
sound and outputs it, and the microphone picks up the sound and outputs the sound based on
the electric signal from the microphone. When performing the adjustment of the characteristics,
it is an acoustic amplification device that can truly specify the voice of the object to which the
adjustment of the acoustic characteristics is to be performed, and as a result, the adjustment of
the correct acoustic characteristics can be performed.
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[0012]
The present invention will be described below based on the best embodiment with the drawings.
However, this does not limit the present invention.
The acoustic amplification device 1 includes a tuner 2, a selector 3, a digital signal processor 4
(hereinafter referred to as “DSP 4”), D / A converters 5, 6, 7, 8, 9 and 10, and amplification
means 11. 12, 13, 14, 15, connection parts 16, 17, 18, 19, 20, 21, connection confirmation parts
22, 23, 24, 25, 26, 27, operation part 28, and control means. A CPU 29 and a memory 30, a
display unit 31, a microphone amplifier 32, and an A / D converter 33 are provided.
[0013]
The tuner 2 tunes a radio wave of a desired broadcast station out of radio waves to be received,
and sends it to the selector 3 as a digital electric signal. That is, the acoustic amplification device
1 is configured to have a tuner function, and is a so-called receiver amplifier. The selector 3
selects only one electric signal from the A / D converter 33, the tuner 2, the DAT reproducing
means 42 and the player 43 based on the control signal from the CPU 29, and sends it to the
DSP 4. The DAT reproduction means 42 and the player 43 are integrated as a reproduction
apparatus.
[0014]
The DSP 4 performs processing for making the signal from the selector 3 an output desired by
the user based on a control signal from the CPU 29. The signal processing includes what is called
a tone control of acoustic characteristics, specifically, increase and decrease of volume at low
temperature and increase and decrease of sharpness of output sound.
[0015]
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The D / A converters 5, 6, 7, 8, 9, and 10 convert digital electric signals relating to the sound
from the DSP 4 into analog. The amplifying means 11, 12, 13, 14, 15 are respectively connected
to the subsequent stages of the D / A converters 5, 6, 7, 8, 9 to amplify analog signals relating to
voice and to connect the connecting portions 16, 17, 18, It is sent to 19, 20.
[0016]
The connectors 16, 17, 18, 19, 20 and 21 respectively have cables for sending electrical signals
to the front right speaker 34, front left speaker 35, center speaker 36, rear right speaker 37, rear
left speaker 38 and subwoofer speaker 39 and It is to connect. The connection parts 16, 17, 18,
19, 20 and 21 are specifically jacks. The connection end of the cable is a connection plug.
[0017]
The acoustic amplification device 1 is configured to be able to adjust acoustic characteristics as
described above. The sound characteristics are adjusted by outputting sound from the front right
speaker 34, the front left speaker 35, the center speaker 36, the rear right speaker 37, the rear
left speaker 38, and the subwoofer speaker 39 and arranging the output sound at the listening
position 40 It becomes possible for the first time by the microphone 41 picked up being picked
up. Therefore, if there is at least one speaker that does not output sound among the front right
speaker 34, front left speaker 35, center speaker 36, rear right speaker 37, rear left speaker 38
and subwoofer speaker 39, the sound at the listening position 40 It is not possible to obtain
proper pickup sampling of
[0018]
In contrast to this, the sound amplification device 1 confirms that the cable for the user to send
an electric signal to each speaker is surely connected in a true manner, and that the sound is
output from each speaker as a result. Connection notification means is provided. The connection
notification means includes connection confirmation units 22, 23, 24, 25, 26, 27, a CPU 29, a
display unit 31 and the like.
[0019]
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That is, the connection confirmation parts 22, 23, 24, 25, 26, 27 are integrally attached to the
connection parts 16, 17, 18, 19, 20, 21 respectively. Each connection confirmation unit 22, 23,
24, 25, 26, 27 is provided with a switch (not shown) that is switched ON / OFF by pressing force,
and each connection unit 16, 17, 18, 19, 20, When the connection plug of the cable is fitted to
the connector 21, each switch is configured to be switched from ON to OFF by a pressing force
due to the fitting.
[0020]
When the switch is switched from on to off and sent to the CPU 29 via a cable (not shown), the
CPU 29 causes the connection check units 22, 23, 24, 25, 26 and 27 to be adjacent to each other
and to the corresponding connection unit 16. , 17, 18, 19, 20, 21 determines that the connection
plug is fitted, that is, the front right speaker 34, the front left speaker 35, and the center
corresponding to the connection portions 16, 17, 18, 19, 20, 21 respectively. It is determined
that a cable for sending an electrical signal to the speaker 36, the rear right speaker 37, the rear
left speaker 38, and the subwoofer speaker 39 is connected. In addition, the CPU 29 detects the
acoustic characteristic of the current output sound from each speaker based on the electric
signal related to the sound picked up by the microphone 41 based on the determination of the
connection with each speaker, and based on the detection result Control is performed to obtain
desired acoustic characteristics.
[0021]
On the other hand, the CPU 29 controls the front right speaker 34 and the front left speaker 35
respectively corresponding to the connection parts 16, 17, 18, 19, 20, 21 by the signals from the
connection confirmation parts 22, 23, 24, 25, 26, 27. If it is determined that at least one of the
cables for sending electrical signals to the center speaker 36, the rear right speaker 37, the rear
left speaker 38, and the subwoofer speaker 39 is not connected, adjustment of the acoustic
characteristics of the current output sound on the display unit 31 is impossible. It is configured
to warn that it is. The test signal for examining the acoustic characteristic to be output from each
speaker is output from the DSP 4.
[0022]
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The operation unit 28 is used by the user to operate the apparatus, and sends a control signal to
the CPU 29 to turn on / off the main power supply, select the selector 3, control of acoustic
characteristics, amplifiers 11, 12, 13, 14, 15 and the control of the output of the subwoofer
speaker 39, the switching of the display content of the display unit 31, etc. The CPU 29 performs
determination, calculation, storage, output instruction and the like based on an operation signal
from the operation unit 28, that is, a control instruction while accessing the memory 30 and data
depending on the case.
[0023]
The memory 30 accesses data necessary for the function of the CPU 29 when necessary, and
stores new data etc. which will be required in the future. The display unit 31 displays the current
function state of the apparatus, displays a manual, and the cables at the connection units 16, 17,
18, 19, 20, 21 based on the connection confirmation units 22, 23, 24, 25, 26, 27 and And a
warning display of the non-connected state of
[0024]
The microphone amplifier 32 is connected to the microphone 41 at a subsequent stage, and the
microphone 41 picks up and converts the test sound of the acoustic characteristic, converts it,
amplifies the output electric signal, and sends it to the A / D converter 32. The A / D converter
32 converts the amplified analog electrical signal from the microphone amplifier 32 into a digital
signal and sends it to the selector 3.
[0025]
The front right speaker 34, the front left speaker 35, the center speaker 36, the rear right
speaker 37, and the rear left speaker 38 are disposed in corresponding ones of the listening
rooms, as the names indicate. The subwoofer speaker 39 is provided with an amplification
function. The microphone 41 is disposed at the listening position 40, and a sound field obtained
by the output sound from the front right speaker 34, the front left speaker 35, the center speaker
36, the rear right speaker 37, the rear left speaker 38 and the subwoofer speaker 39. The output
sound is picked up to measure acoustic characteristics and the like. The microphone 41 is
removed from the listening position 40 when the measurement is completed.
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[0026]
The DAT reproducing means 42 reproduces the digitally recorded tape and outputs an electric
signal related to the sound. The player 43 reproduces a compact disc, a so-called CD, and outputs
an electric signal related to sound. The electric signal from the microphone 41, the reception
signal from the tuner 2, the electric signal from the DAT reproducing means 42, and the electric
signal from the player 43 are sent to the selector 3, selected only, and sent to the DSP 4.
[0027]
The acoustic amplifier 1 is. It is configured as described above. In the following, confirmation of
the connection between the acoustic amplification device 1 and each speaker at the time of
detection and measurement of acoustic characteristics will be described. The user connects the
connection plugs of the cables of the front right speaker 34, the front left speaker 35, the center
speaker 36, the rear right speaker 37, the rear left speaker 38 and the subwoofer speaker 39 to
the connection portions 16, 17, 18, 19, 20, 21 respectively. And the sound amplification device 1
and the front right speaker 34, the front left speaker 35, the center speaker 36, the rear right
speaker 37, the rear left speaker 38 and the subwoofer speaker 39 are connected via a cable.
[0028]
In this state, the user operates the operation unit 28 to turn on the main power to start
measurement of acoustic characteristics. Subsequently, since the user is the first position where
the front right speaker 34, the front left speaker 35, the center speaker 36, the rear right speaker
37, the rear left speaker 38, and the subwoofer speaker 39 are disposed, the measurement is
initially performed. Perform state setting or initialization.
[0029]
Here, the user causes the above-mentioned connection notification means of the acoustic
amplification device 1 to function. That is, since the sound amplification device 1 is in the
standby state for sound measurement, the front right speaker 34, the front left speaker 35, the
center speaker 36, the rear right speaker 37, the rear left speaker 38 and the subwoofer speaker
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39 are The connection plug of each cable is to be fitted to each of the connection parts 16, 17,
18, 19, 20, 21 respectively. And the connection plug of each cable to the front right speaker 34,
the front left speaker 35, the center speaker 36, the rear right speaker 37, the rear left speaker
38 and the subwoofer speaker 39 has the connection portions 16, 17, 18, 19, 20, respectively. If
the connector 21 is fitted, a signal indicating whether or not the fitting state is received from the
corresponding connection check sections 22, 23, 24, 25, 26, 27 by the pressing force generated
by the fitting is CPU 31 Will be sent to
[0030]
Here, when the CPU 29 detects that the connection unit 16 is in a connection state with the cable
to the front right speaker 34 based on the above signal from the connection check unit 22, an
electric signal for measuring an acoustic characteristic from the DSP 4 is Make it output.
Subsequently, the electric signal for measurement from the DSP 4 is sent to the D / A converter
5, converted into an analog electric signal, and sent to the subsequent stage. The analog electrical
signal from the D / A converter 5 is sent to the amplification means 11 and amplified to a level
suitable for measuring acoustic characteristics.
[0031]
The analog electrical signal amplified by the amplification means 11 is sent to the connection
portion 16 and further sent to the front right speaker 34 via the connection portion 16 and the
cable. Here, a sound for measurement of acoustic characteristics is output from the front right
speaker 34. When a sound for measurement of acoustic characteristics is output from the front
right speaker 34, the microphone 41 picks up the sound, converts it into an analog electric
signal, and sends it to the amplifier 32.
[0032]
The amplifier 32 amplifies the electric signal from the microphone 41 to a preset level and sends
it to the A / D converter 33. The A / D converter 33 converts an analog electrical signal from the
amplifier 32 into a digital signal and sends it to the selector 3.
[0033]
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At this time, since the acoustic amplification device 1 measures the acoustic characteristics, the
selector 3 selectively passes only the digital electrical signal from the A / D converter 33 and
sends it to the DSP 4. Here, the CPU 29 receives, from the DSP 4, an electrical signal related to
the sound emitted from the front right speaker 34, compares it with the acoustic characteristics
stored in advance in the memory 30, and displays the comparison result on the display unit 31.
[0034]
The acoustic amplification device 1 similarly detects the acoustic characteristic of the electrical
signal of the sound emitted from the other speaker. In addition, all acoustic characteristics of the
front right speaker 34, the front left speaker 35, the center speaker 36, the rear right speaker
37, the rear left speaker 38, and the subwoofer speaker 39 are simultaneously determined to
determine the sound field at the listening position 40. Use is also possible.
[0035]
Even in such a case, in the acoustic amplification device 1, the connection plug of each cable to
the front right speaker 34, the front left speaker 35, the center speaker 36, the rear right speaker
37, the rear left speaker 38 and the subwoofer speaker 39 is a connection portion When not
connected to 16, 17, 18, 19, 20 and 21, it functions to identify a speaker not connected and
display it on the display unit 31. When a speaker whose connection is not made is displayed on
the display unit 31, the user may fit and connect the connection plug of the cable relating to the
speaker to the corresponding connection unit.
[0036]
Since the acoustic amplification device 1 functions as described above, the speaker outputs the
sound of the target of detection of the acoustic characteristic when converting the amplified
electric signal into sound from the speaker and outputting the sound to detect the acoustic
characteristic. It can be checked whether or not it is truly connected, and it becomes possible to
detect the acoustic characteristic of the sound from the speaker without fail. The user detects the
acoustic characteristics of the sound from the front right speaker 34, the front left speaker 35,
the center speaker 36, the rear right speaker 37, the rear left speaker 38 and the subwoofer
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speaker 39, and further, if necessary and desired, the acoustic characteristics. The sound of the
acoustic characteristic according to the adjustment becomes the front right speaker 34, the front
left speaker 35, the center speaker 36, the rear right speaker 37, and the rear left speaker when
any one of the tuner 2, the DAT 42 and the player 43 is made to function. It is outputted from
the speaker 38 and the subwoofer 39.
[0037]
On the other hand, in the acoustic amplification device 1, the connection portion 16
corresponding to the connection plug of each cable to the front right speaker 34, front left
speaker 35, center speaker 36, rear right speaker 37, rear left speaker 38 and subwoofer
speaker 39 respectively If any one of 17, 18, 19, 20 and 21 is not connected, that effect is
displayed on the display unit 31. Therefore, the user can indicate which speaker is not connected.
It is possible to recognize from this that it is an adjustment of the acoustic properties in such a
connection state.
[0038]
FIG. 2 is a block diagram for explaining the configuration when a speaker and a microphone are
connected to the best mode of the embodiment of the present invention.
FIG. 2 is a configuration explanatory view for explaining a configuration when a speaker and a
microphone are connected to inspect the acoustic property in the best mode of the embodiment
shown in FIG.
Explanation of sign
[0039]
1: Sound amplification device 3: Selector 4: DSP (adjustment means) 5, 6, 7, 8, 9, 10: D / A
converter 11, 12, 13, 14, 15: Amplifier 16, 17, 18, 12 , 20, 21: connection unit 22, 23, 24, 25,
26, 27: connection confirmation unit (connection notification means) 29: CPU 31: display unit
34, 35, 36, 37, 38, 39: speaker 41: microphone
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