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JPS55141199

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DESCRIPTION JPS55141199
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an example of a
microphone used in the present invention, FIG. 2 is a system diagram showing an embodiment of
the present invention, and FIG. 3 is an embodiment of the present invention. It is a systematic
diagram which shows an example. 1: Main microphone, 2a, 2b, 3a, 3b: Sound pressure detection!
, 10a, 10b ', 13a, 13b: rectification and smoothing circuit, 11.14: addition circuit, 4,5 [deg.] 16:
signal control circuit.
[Detailed description of the invention] This 4 option is -1 if it is a signal suitable for expanding
necks etc. In particular, it is intended to easily outperform various control voltages. When singing
to the microphone, it may be convenient to add the effects of six bridges such as tremolo, vibrato,
etc. depending on the will of the singer himself. The object of the present invention is to provide
a signal control apparatus which enables a congregation or a singer or the like to easily add
various sound effects etc. to one's own voice (1), 'q7 //. Hereinafter, an embodiment according to
the present invention will be described in detail with reference to the drawings. FIG. 1 shows one
implementation-1 of this invention. In the figure, 1 denotes a main microphone, and 2a, 2b and
3a, 3b respectively indicate an accumulated pressure detector. The i pressure sensors 2a, 2b and
3a, 3b are attached to the four circumferences of the main microphone 1 while keeping an
angular distance of 1c 180 between each other. As shown in the Wang microphone lri second-, it
is connected to, for example, the town Ken gain 4Jis @ h as an appropriate sign control circuit,
and its amplified output is connected to the I'Tf band pass 1 wave unit 5 as a second Iingo
control circuit. To supply-"variable bandwidth 4 f! It is assumed that the speaker 6 is driven by
the output of the single wave device 5. In this example, both of the variable gain amplifier 4 and
the variable band pass 1 wave 65 are controlled to be superior to the tonomoro and the sound
effect called the wah 9. That is, the output of the (2) second variable gain amplifier 7 is applied to
the gain-side 4m terminal 4a of the variable gain gain @i. Several seven low frequency am
amplifiers 8 are connected to the input of the second variable gain amplifier 7, and the second
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variable gain amplifier 70 controls the second variable gain amplifier 70 by applying a control
voltage to the second variable gain amplifier 70 as needed. Give gain to gain amplifier 7 and give
@day signal of low frequency '@ digger 8 to control @ terminal 43 of first variable gain amplifier
4 and lower gain of first gain increaser 4g The signal is changed according to the frequency
signal to give a tremolo effect to the signal captured by the microphone 1. Second possible f,? A
voltage proportional to the deviation of the voltage spouted by the pressure injectors 3a and 3b
is applied to the limiting terminal 7a of the IJn increment 11157. In other words, 83 m and 3b
are the main as explained in Figure 1! The eyelet 180 is attached to the eyelet 180 so as to be
opposite to the eyelet, and the injection signal is 111111 mL in the amplifiers 9a and 9b, and the
amplified output is supplied to the rectified [gl 賂 10a and lOb. The rectifying circuits 1tla and
10b are each configured to generate a rectified output opposite to each other fji note, the
rectified output is added by the adding circuit 11, and the second possible, the gain amplifier 7 is
controlled by a multiplier / generator (3 ) 7m and so on.
Therefore, if the speaker or singer is facing at a distance equal to the sound pressure detectors
3m and 3b, the output of the + itn calculation path 11 is zero, and the gain of the second sensible
gain amplification s7 is Is narrowed to y zero. On the other hand, for example, by applying a
large umbrella sound pressure, for example, breath or the like to the sound pressure detector 3a,
the rectification circuit 10a-a large rectified output of, for example, positive polarity is generated.
On the other hand, the rectified output of the sound pressure detector 3b is small in this case
(since only a small sound pressure is given). Therefore, a positive voltage is generated at the
output of the adder circuit 11 and a gain is generated in the 217th variable gain amplifier 7 by
the positive voltage, and the oscillator 80 output signal is a first variable gain 111 of the second
unit 4. @ The terminal 43 is given. Therefore, the gain of the first variable gain amplifier 4 is
electrified in the period of the signal of the oscillator 8 and the tremolo effect is added. On the
other hand, in the case of the edible band pass P wave device 5, its control terminal 5m is, for
example, of positive polarity fl! The center frequency of the passband moves to the high level
when the 11ll voltage is given, and when the control voltage of the negative polarity is given, the
(4) 6 frequencies in the passband are controlled to move low In77K . This control voltage is given
by the detection signals of the sound pressure detectors 2m and 2b. That is, the detection
voltages of the sound pressure detectors 2m and 2b are amplified by the amplifiers 12a and 12b,
and the amplified outputs are respectively corrected by the rectifier circuits 13a and 13b, and
the power of the common flow field is added by the adding circuit 14 to be variable This signal is
applied to the control terminal 58 of the band pass single wave device 5. The rectifying ports W
& apos; 13a, 13b are configured to obtain rectified outputs of opposite polarities. Therefore,
when the sound pressure is equally applied to the sound pressure detectors 2m and 2b, the
output voltage of the 1-adding circuit 4 is zero. At this time, it is assumed that the center
frequency of the pass band of the variable band pass-AI 'wave unit 5 is located at the center of
the audio frequency band if it is kept. Here, for example, when a large sound pressure is applied
to the sound pressure detector 2aK, the positive voltage output from the rectifier circuit 13a
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becomes large, and the adding circuit 14 outputs a positive voltage. Accordingly, the central
south wave number of the passband of the variable band pass r wave unit 5 is increased. Here,
when the sound pressure given by the sound pressure detector 2aK is constant, the center
frequency of the variable imperial 4P waver (5) 5 is moved to a higher i! Low in frequency
position! However, it is rather difficult to keep the sound pressure tight in breath and the like,
and since it is long ago that the sound pressure changes, the center frequency of the fusible band
P wave unit 5 always fluctuates.
Furthermore, positive and negative control m'et pressure is generated from the addition circuit
14 by taking and moving the left and right microphone l't-11'm, and the center frequency of the
visible band pass-AP wave unit 5 is the audio frequency band Moves between the lows and highs
of A whistle rather than a whistle is added to the whistle picked up by the rounding main
microphone l and emitted from the speaker 6. This wah wah effect can also be configured to be
able to be eliminated by turning on the switch 15 as necessary. As described above, according to
the present invention, in the above embodiment, the voice pressure is given to the main
microphone 1 and the direction to give the voice is changed to change the sound pressure to be
applied to the pressure accumulation detector 2a, 2b or 3a, 3bK. One control voltage can be
obtained, and the two control voltages (therefore one can for example use Tremo U to be used for
the control, the other can be used for the control to give the wah wah effect (6), the speaker
Alternatively, the singer can add these special effects to the voice simply by changing the
opposite direction of the microphone 4 phone IK. It is convenient because it does not require
such a poor man's hand. In the above description, it is assumed that the tow seven cI or the wow
wah effect is obtained by the detection output of the pressure accumulation detector lI! I
mentioned, for example, 311! As shown in il, the equalizing f 16 is controlled by the detection
output of the pressure accumulation detector 2a 12b, and for example, a positive control voltage
is obtained from the adder circuit 14 by applying pressure accumulation from the right side. It
can also be configured so that it can be appropriately selected so as to have a low frequency
emphasizing characteristic when the 241160 station wave number characteristic has a high
frequency emphasizing characteristic or a tube pressure is given from left information. As
another embodiment, the present invention can be applied to, for example, an electronic device
called "Synthesis-free". In this case, the voltage value of the difference obtained from the adding
circuits 11 and 14 can be given to the synthesizer, and another special effect sound can be added
to the output signal of the synthesizer by the tray 40 or (7). As described above, according to the
present invention, it is possible to obtain a control signal only by changing the direction in which
sound pressure is given to the microphone l. It is convenient to add seven sound effects.
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