JPH0773396B2 - Karaoke playing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a karaoke performance device capable of singing while feeling the rhythm of karaoke accompaniment music.

[0002]

2. Description of the Related Art In recent years, karaoke-related products have become widespread, and there are increasing opportunities to easily enjoy karaoke performance not only at snacks and homes but also at karaoke boxes and the like. In the karaoke performance, a large and expensive speaker system must be installed in order to enhance the bass reproduction capability and enjoy a realistic performance. Also, it is difficult for an amateur to match his singing voice according to the rhythm of accompaniment music,
In a karaoke performance including a video screen such as a laser disc, a method of keeping up with the rhythm of the accompaniment is performed by changing the color display of the lyrics displayed on the screen. However, when an amateur tries to sing karaoke accompaniment music in the background, he or she tends to miss the tempo of the accompaniment, making it difficult to sing along with the rhythm. In addition, a large speaker system needs to be installed in order to reproduce a rich bass sound, and there is a drawback that it is difficult to secure the space in a small room.
In order to solve these problems, the top plate can be vibrated vertically at least with respect to the part facing the floor, so that you can enjoy the karaoke performance on the stage while feeling the accompaniment rhythm as vibration even with your body. And a vibration unit is mounted in the housing to vibrate the top plate of the housing (Japanese Patent Laid-Open No. 60-13078).
No. 5) or a structure in which a speaker is provided in the stage and the upper surface of the stage is vibrated by air vibration of the reproduced sound by the speaker (Japanese Utility Model Publication No. 63-49978).

[0003]

However, in the stage having the above structure, the upper plate of the stage is easily vibrated.
A structure in which the upper plate is supported by an elastic support, or the upper plate has a wide plate surface. Therefore, the strength of the top plate of the stage with respect to the load is reduced, and thus the singer's movement on the stage is greatly restricted. Further, when an attempt is made to increase the vibration from the top plate of the stage to obtain a clear sense of rhythm, the levels of the frequency at which the sense of rhythm is often felt and the levels other than that are also raised. The frequencies other than the frequency with which the sense of rhythm is often felt include the frequencies with which the body feels uncomfortable, and when these exceed a certain level, the discomfort abruptly increases. Therefore, there is a problem that the range of adjustment of the vibration level of the stage top plate is also restricted. An object of the present invention is to provide a device capable of emphasizing a vibration that gives a sense of rhythm while having a structure in which a singer does not hinder singing on the stage while performing intense choreography.

[0004]

Therefore, according to the present invention,
The vibrating means for vibrating the upper surface of the stage with the low-frequency signal extracted from the accompaniment signal includes a speaker for applying the low-frequency signal extracted from the accompaniment signal and a stage-type speaker cabinet incorporating the speaker. The top plate that forms the stage and the partition between the top plate and the bottom plate support the top plate by forming a sound path for the bass boost circuit on the back of the speaker and the sound path of the bass boost circuit and the speaker. The sound path on the front side is combined and connected to the opening.The sound in the low range is radiated from this opening, and the peak value of the acoustic impedance of the bass boost circuit is tuned to a frequency that gives a good rhythmic feel. It is characterized by that.

[0005]

In the enclosure in which the bass enhancement circuit is formed by the sound path having an opening that does not have a sufficient opening area for the wavelength of the reproduced frequency, the sound path and the opening are formed in the frequency range that can be reproduced by the bass enhancement circuit. At the edge, the way the sound is transmitted changes abruptly, and the reflection on the aperture surface becomes large. Therefore, the acoustic impedance gradually converges as the frequency rises while repeating steep peaks and dips. Then, at the peak value of the acoustic impedance, the sound path easily vibrates. In the present invention, attention is paid to this point, and the peak value of this acoustic impedance is tuned to a frequency at which a sense of rhythm can be felt well, so that the stage upper surface plate is vibrated. Then, the top plate that forms the stage and the partition between the top plate and the bottom plate are partitioned by the partition plate to support the top plate, thereby reinforcing the top plate that forms the stage and allowing the singer to perform intense choreography on the stage. While trying to sing, the strength is such that it will not interfere.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A karaoke playing device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a speaker layout diagram and circuit configuration diagram showing an embodiment of a karaoke playing device according to the present invention. A musical tone signal from a device group 1 for reproducing a karaoke source recorded on a music tape, a compact disc, a laser disc or the like is branched via an amplifier 2 and an attenuator 3, and one of them is added to an adding circuit 9,
The other is added to the low pass filter 12.

A voice signal obtained by picking up a singing voice by a singer 16 in a karaoke room 15 by a microphone 4 is branched via an amplifier 5 and an attenuator 6, one of which is added to an adding circuit 9 and the other of which is called a reverberation processing circuit 7. Attenuator 8
Add an appropriate level of reverberation and add it to the adder circuit 9.

The output signal of the adder circuit 9 in which reverberation is added to the karaoke accompaniment music and the echoed singing voice signal is mixed is level-adjusted and amplified by the attenuator 10 and the output amplifier 11 and added to the loudspeakers 17 and 18 for loudness. The sound is radiated into the room 15.

On the other hand, the heavy bass signal from the low-pass filter 12 extracted from the karaoke accompaniment signal is applied to the attenuator 13.
By driving the built-in bass speaker in the stage-type speaker system 19 via the output amplifier 14 and the output amplifier 14, the floor surface 19a is vibrated and the acoustic port 19 is operated.
Heavy bass is radiated from the b and 19c into the room 15.

FIG. 2 is a sectional view showing the internal structure of the stage type speaker system 19 of FIG. The low-frequency signal obtained by converting the karaoke accompaniment signal to less than a hundred and several tens of hertz through the low-pass filter 12 is added to the bass speaker unit 20. The sound from the back surface of the diaphragm of the speaker unit 20 is generated by the partition plate 21 in the acoustic maze 22 having a special structure.
Is enhanced by passing through. Then, the back sound and the sound from the front surface of the diaphragm of the speaker unit 20 are combined and radiated into the room through the acoustic ports 19b and 19c. Since the opening surfaces of the acoustic ports 19b and 19c are not sufficiently large with respect to the wavelength of the radiated low frequency, the way the sound is transmitted suddenly changes at the opening end, and the acoustic impedance has a sharp peak. And dips. For example, the acoustic maze 22 is formed in a back load horn, and the lowest frequency (fl) at which the acoustic impedance shows a peak value.
Is adjusted to 40HZ, which gives a good rhythmic feeling,
Since the peak of the acoustic impedance appears in fl (n: an integer), 80HZ, 120HZ, 160HZ become the peak value of the acoustic impedance, and the radiated sound pressure from the acoustic ports 19b and 19c is enhanced at this frequency and the stage-type speaker is also increased. -The vibration of the system 19 is also increased.

Further, the partition plate 21 plays a role of supporting and reinforcing the stage floor surface 19a, and the acoustic maze 22 also plays a role of giving deep bass vibration to the stage floor surface 19a by passing low frequency sound waves. The low-frequency component during karaoke performance is reproduced from the stage-type speaker system 19 which also serves as a stage and which has a large internal volume and is reinforced with low-pitched sound.

[0012] Therefore, for loudspeaking in the hall, it is sufficient to be able to reproduce only the middle and high frequencies.
It suffices if the lightweight loudspeakers 17 and 18 are provided, and the space in the room can be effectively utilized. Moreover, the low-frequency component of the rhythm section such as the drum bass is transmitted to the singer as a sensory vibration through the stage floor surface 19a, so that it is possible to sing while feeling the rhythm, it is easy to get on the tempo of the accompaniment, and even an amateur can easily sing. There are advantages.

[0013]

As described above, according to the present invention, the vibration of the rhythm section can be emphasized. In addition, the top plate that forms the stage has a partition plate between the top plate and the bottom plate to reinforce the top plate, so even if the singer sings violently while singing on the stage, there is a problem. You can get no strength.

[Brief description of drawings]

FIG. 1 is a speaker layout diagram and a circuit configuration diagram showing an embodiment of the present invention.

FIG. 2 is a sectional view showing the internal structure of a stage type speaker system used in the embodiment of FIG.

[Explanation of symbols]

 1 Equipment group 2,5 Amplifier 3,6,8,10,13 Attenuator 4 Microphone 7 Reverberation processing circuit 9 Adder circuit 11,14 Output amplifier 12 Low-pass filter 15 Indoor 16 Singer 17,18 Loudspeaker 19 Stage type speaker system 19a Floors 19b, 19c Acoustic port 20 Speaker unit 21 Partition plate 22 Acoustic maze

Claims (1)

[Claims] 1. An adding unit for adding an accompaniment signal of a karaoke source and a voice signal of a singer input by a microphone, a unit for reproducing the added reproduction output signal from a loud speaker for in-field loudspeaker, and an extract from the accompaniment signal. In a karaoke playing device provided with a vibrating means for vibrating the upper surface of a stage by a low frequency signal, the vibrating means for vibrating the upper surface of the stage incorporates a speaker for applying a low frequency signal extracted from the accompaniment signal and the speaker. The speaker cabinet comprises a stage-type speaker cabinet, and the speaker cabinet supports the top plate by a top plate that forms the stage and a partition plate that connects the top plate and the bottom plate, and a bass enhancement circuit on the back surface of the speaker. Sound path of the bass enhancement circuit and the sound path of the front surface of the speaker are synthesized and opened. Karaoke playing device characterized by being connected to the mouth.