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The present invention is a rhythm detection device used in an apparatus for extracting a rhythm
signal from a low frequency signal from an audio device and vibrating a human body such as a
small stage for karaoke or a chair. It is about (Prior Art) A sense of sound device which takes out
the bass component of music and gives a sensational vibration can also obtain a sense of rhythm,
but this sense of sound device is not only a sense of rhythm but also 1 feeling of bass and energy.
It has the effect of giving the human body an impression of music and doubling its sense of
euphoria, so it is not necessarily suitable for devices intended to obtain only a sense of rhythm.
Percussive sounds like bass drums give a good sense of rhythm, but continuous sounds like
musical sounds tend to obscure the sense of rhythm. Recent poppylar music and other frequently
used electric basses are quite continuous-sounding, and provide pleasant euphoria and
physiological pleasure, but obscure the sense of rhythm. As an application example of the
rhythmic sensation apparatus, there is a combination with so-called [-Karaoke] which is widely
used recently. When singing in karaoke, I sing along with it while listening to the accompaniment
of [Soraoke], where the voice of the singer of the song is not recorded, but instead of listening to
the companion from the ear, If you can feel the rhythm of the accompaniment with your body, it
will be easier to sing, come to the music, and the fun of karaoke will be doubled. A sensational
sound system is built into a small stage made of plywood, etc. and driven by the accompaniment
music of karaoke, and standing on this sensational sound stage and singing, since the sensational
vibration by the music signal is obtained, a sense of rhythm is felt. It is possible to obtain an
effect that doubles the fun of karaoke. Although it has already been described next to the effect
of doubling the emotion and euphoric feeling of the bodily sensation sound device, for those who
sing by karaoke (performers), first of all, the sense of rhythm is better or a spark that breaks off
It is a request. In recent songs and songs, bass drums and electric bass are often used. The bass
drum has a good sense of rhythm but the electric bass is likely to obscure the sense of rhythm,
which is a disadvantage for karaoke players. It has been experimentally confirmed that this is
particularly noticeable in a system in which vibration is felt only from the sole of the foot as a
stage. Although the above description mainly uses a sensational sound device for karaoke, it is
not limited to a karaoke, and for example, a sensational sound device for a monitor that causes a
stage performer to accurately obtain rhythm sounds of other performers. The same thing can be
said for the same, and the same thing can be said for the device that has a sense of rhythm in a
chair or bed.
(Object of the Invention) The present invention has been made to eliminate the inconveniences of
Toki, and the rhythm of the music I is applied to the gap 1 and it is clear even in the case of
continuous musical instruments such as electric bass. The purpose is to provide Lisno 4 Bidding
1 11 11 'X, which is capable of producing a rhythmic no-sheng. (Structure of the Invention) The
present invention has two purposes, namely, a stray JJy, J //, and a detection circuit for
encircling and extracting Ti ?; j ? from low frequency signals from audio equipment, The
output of the detection circuit (a rhythm detection circuit that differentiates the Shinetsu
intensity envelope signal, which is a D number, and a direct current component, and a rhythm
detection circuit that produces a difference JJ (JJ'y, which has a symbol). EXAMPLE Next, one
example of the present invention will be described with reference to the drawings. In FIG. 1, 1 is
an input terminal, 2 is a low pass filter for passing a low frequency signal of about 150 Hz or less
among audio signals input to the input terminal 1, 6 is a signal from the signal passed through
the low pass filter 2 A detection circuit 4 takes out the intensity envelope, and a rhythm
detection circuit 4 differentiates the output signal of the detection circuit 6 and reproduces a DC
component. The input side of the detection circuit 1 ? 3 is connected to the output side of the
low pass filter 2, but at the output side of the low pass filter 2, along with this, the voltage control
amplifier (VCA) 5 'Ali also 3 b? ??????? When receiving a control signal from the rhythm
detection circuit 4, the voltage control amplifier 5 amplifies the signal from the low pass filter 2
in accordance with the control signal. Is the output side of the voltage control amplifier 5 power
amplified? It is connected via 56 to a transducer 8 mounted on the top plate of the stage 7 made
for karaoke. The converter 8 generates a vibration by a mutual sharpening action between a coil
for flowing an output signal of the power amplifier 6 and a magnet provided in the vicinity
thereof to vibrate the top plate of the stage 7. FIG. 2 shows an actual example of the detection
circuit 3 and the rhythm detection circuit 4. The detection circuit 6 includes two operational
amplifiers 9.10 and two diodes 11.12 and a resistor. This is a full-wave rectification type AC-DC
conversion circuit connected as shown by a 4% capacitor 21 for giving an appropriate time
constant to an absolute value circuit consisting of 13-19. This circuit can basically be a simple
detection circuit with a diode, but in the half wave rectification form it may be the first half wave,
so it is desirable to have a full waveform, and so on . The rhythm detection circuit 4 is a
modification of a kind of DC component reproduction circuit in which the number of lids of the
capacitor 22 is reduced. A capacitor 22, a diode 23, and a resistor 24 are connected to the input
B111 of the buffer amplifier 21. It is.
If the diode 23 is absent, a negative component appears on the input side of the buffer amplifier
21 if this diode 23 is not present, so that the case where the head of a small rhythm signal
among the output components of the detection circuit 3 does not appear as a positive component
occurs. easy. Therefore, the negative discharge time constant is made faster by the diode 23 so
that the head of the rhythm comes out with certainty. Next, the operation of this device
configured in this way will be described. When an audio signal is input to the input terminal 1
from a tape deck or the like (not shown), the filter 2 passes signals of about 150 Hz or less of the
original. This signal drives the power amplifier 6 according to the control when the voltage
control amplifier 5 receives a control signal from the rhythm detection circuit 4 and causes the
converter 8 to vibrate the top plate of the stage 7. On the input side of the detection circuit 3, as
shown in (a) of FIG. 3, a bass drum signal with a packable and clear rhythm, a continuoussounding electric bass signal as shown in (b), etc. Mixed input. In the detection circuit 6, the
signal strength envelopes (FIGS. 4 (a) and 4 (b)) of these signals are detected, and in the state of
pulsating current, the signal is sent to the capacitor 22 of the rhythm detection circuit 4 at the
next stage. It will be given. This signal current causes positive and negative currents to
alternately flow through the capacitor 22. However, since the diode 23 is in contact with the
direction shown in the subsequent stage C, the negative component is cut off, as shown in FIG.
The reason why the upper part is flat in (a) is due to the saturation of the buffer amplifier 21. 6
(a) and 6 (b) are output waveforms of the voltage control amplifier 5, which are waveforms of
signals for driving the converter 8. FIG. In the embodiment described above, the signal source for
driving the converter 8 is also obtained from the audio signal from the audio equipment, but as
shown in FIG. 7, this separately provides a signal source for driving the converter 8 A low
frequency oscillator 25 (or a commercial power source) may be provided, and in this way, a good
rhythm feeling can be obtained for the music 1 having a relatively low frequency range. Further,
the converter 8 may be operated directly by switching the drive circuit using a transistor by the
output signal of the rhythm detection circuit 4 using an electric hammer consisting of a solenoid
and a plunger as the converter 8 (eighth embodiment) See the figure). (Effects of the Invention)
Since the present invention is configured as described above, it is possible to vibrate the stage for
karaoke, or a human body mounting object such as a chair or bed in synchronization with the
rhythm of music. .
And the instrumental sound may be one that emits a continuous sound. Further, by using a nonpass filter, a no-pass filter or the like in addition to the low pass filter shown in the embodiment
at the input stage, it is possible to match to a specific musical instrument sound.
Brief description of the drawings
1 is a block diagram showing a basic circuit according to an embodiment of the present
invention, FIG. 2 is a circuit diagram of a part of the specific circuit in FIG. 1, and each (a) of FIG.
6 to FIG. (B) is an explanatory view for explaining the operation, and FIGS. 7 and 8 are block
diagrams of other embodiments of the present invention.
3 иии Detection circuit 4 и и и Rhythm detection circuit 5 и и и Voltage control amplifier 8 и и и и и и и
converter diagram 3 diagram 5 diagram fourth cause 6 diagram
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jps60142399, description
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