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JPH07234666

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH07234666
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
upright type piano, and more particularly to an upright type piano capable of emitting medium to
high range sounds with good sound quality and spread.
[0002]
2. Description of the Related Art FIG. 6 is an external view of a grand piano, and FIG. 7 is a side
sectional view showing the structure of the main part of the grand piano. In the figure, 2 is a
keyboard, 3 is a soundboard, 4 is a string, and 5 is an action.
[0003]
As shown in the external view of FIG. 6, the grand piano opens the upper cover during the
performance, so the sounds generated from the strings 4 and the soundboard 3 are directly
emitted to the outside of the main body case. Therefore, it is possible to obtain excellent sound
quality and a feeling of expansion without shortage of high directional high-pitched sound.
[0004]
However, the grand piano has a large size of the instrument itself due to its structure, and the
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cost is higher than that of the upright piano, so it has the disadvantage that it is difficult to
spread to general homes in terms of space and cost.
[0005]
In particular, when an excellent sound quality and sound spread like a full concert piano is
required, it is necessary to increase the length of the sound board 3 and the strings 4 and the
grand piano has a problem that the size is further increased.
[0006]
FIG. 8 is a side sectional view showing the structure of the main part of a conventional upright
piano.
In the figure, 2 is a keyboard, 3 is a soundboard, 4 is a string, and 5 is an action.
[0007]
Unlike grand pianos, upright pianos are compact and easy to use at low cost, but due to the
closed structure as shown, the sound generated from strings 4 and the sound generated from
soundboards 3 are in the main case. It has a structure that is obstructed and hard to be emitted
directly to the outside.
[0008]
For this reason, the sound generated when the user plays the keyboard 2 hard is hardly emitted
to the outside, and the volume of the player is likely to be insufficient.
In particular, the high-pitched sound with high directivity is difficult to reach directly to the
performer, and the high-pitched band lacks, and it has a drawback that the sound quality
becomes round and hard to play as compared to the grand piano.
[0009]
As described above, the upright piano lacks high-frequency components due to its structure, so
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that it can not obtain the tone quality and spread like a grand piano, and an improvement is
required.
[0010]
SUMMARY OF THE INVENTION The present invention has been made in view of the above
circumstances, and utilizes the advantages of a small-sized, low-priced upright-type piano, and
further enhances the sound quality of the middle to high range with a good sound quality. The
purpose is to provide an upright piano that can emit sound.
[0011]
According to a first aspect of the present invention, there is provided a sound collecting
microphone 6 for collecting a sound produced by a portion producing sound in the middle to
high frequency range, and a sound collected by the sound collecting microphone 6 Preamp 12, a
high pass filter 13 for filtering the high range portion of the sound amplified by the preamp 12, a
pseudo stereo device 14 for distributing the sound filtered by the high pass filter 13 into left and
right sounds, and the pseudo stereo device 14 The amplifier 15L and 15R respectively amplify
the sound distributed in the above, and the speakers 7L, 8L, 7R and 8R for emitting the sound
amplified by the amplifier to the outside.
[0012]
The second invention amplifies the sound collected by the sound collection microphones 6L and
6R independently for each of the plurality of sound collection microphones 6L and 6R that
collect the sound of each range unit and each sound collection microphone The preamplifiers
12L and 12R, the high pass filters 13L and 13R for filtering the high-pitched portion of the
sound amplified by the preamplifiers 12L and 12R, the amplifiers 15L and 15R for amplifying
the respective filtered sounds, and the amplifiers 15L, It comprises speakers 7L, 8L, 7R, 8R for
emitting the sound amplified by 15R to the outside.
[0013]
According to a third invention, in the first and second inventions, the speakers 7L, 8L, 7R, 8R are
attached to the left and right of the front plate portion 1 of the upright piano via slits 10L, 11L,
10R, 11R. Be
[0014]
[Function] The first invention does not take up the space of the upright piano, and achieves the
excellent sound quality and the spread of the grand piano while taking advantage of the low
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price, so the high range in the interior of the upright piano The microphone 6 is placed opposite
to the string 4 and the sound generated from the string 4 is picked up.
[0015]
The picked up sound is taken out of the middle to high range with the high-pass filter 13 and
made into stereo by the pseudo stereo device 14 and reproduced by the medium to high range
speaker 7L, 8L, 7R, 8R and directly emitted to the outside by the grand piano. You get such
excellent sound quality and sound spread.
[0016]
Slits 10L, 11L, 10R, and 11R are provided at the speaker mounting positions of the upright
piano, and the speakers 7L, 8L, 7R, and 8R are attached outward to the slit portions so that
sound can be emitted directly to the outside. .
[0017]
Therefore, when the performer plays the keyboard 2, the upright piano sounds and, at the same
time, the sound produced from the string 4 by the reproducing apparatus section including the
sound collection microphone 6 is directly output to the outside from the speakers 7L, 8L, 7R, 8R.
It is emitted.
[0018]
As a result, since the sound in the middle and high range can be directly emitted to the outside,
the low-priced upright piano can provide a feeling similar to a grand piano with a broad range
without making the sound round.
[0019]
In the second invention, a plurality of pickup microphones 6L and 6R for picking up sounds
produced by each range from low to high are installed opposite to the strings 4 of each range,
and each collection microphone 6L and 6R is provided. Independently, the sound collected by the
sound collection microphones 6L and 6R is amplified by the preamplifiers 12L and 12R.
[0020]
The middle to high frequency range of the amplified sound is filtered by the high pass filters 13L
and 13R, and the filtered sound is amplified by the amplifiers 15L and 15R and emitted from the
speakers 7L, 8L, 7R and 8R.
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[0021]
The speakers 7L, 8L, 7R, 8R are attached to the left and right of the front plate portion 1 of the
upright piano via slits 10L, 11L, 10R, 11R to facilitate sound emission to the outside.
[0022]
As a result, the sound picked up from the low range part is emitted from the speakers 7L and 8L
on the left side, and the sound collected from the middle and high range parts is discharged from
the speakers 7R and 8R on the right side. Is possible.
[0023]
In the present invention, since the sound of middle to high range or high range is taken out, the
speaker to be used may be for middle to high range or high range, so the speaker is compact and
inexpensive, and compact installation is possible. .
[0024]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a side sectional view
showing the structure of the main part of an upright piano according to the present invention.
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0025]
In the following description, the same parts as in FIG. 8 will be assigned the same reference
numerals.
In addition, for each reference numeral in the drawings, L indicates the left side, R indicates the
right side, and those without the reference numeral are common.
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[0026]
In FIG. 1, 1 is a front plate portion, 2 is a keyboard, 3 is a sound board, 4 is a string, 5 is an
action, 6 is a sound collecting microphone, 7 and 8 are middle to high pitch speakers, and 9 is a
keyboard lid.
[0027]
The side sectional view of the upright piano of FIG. 1 is common to the first and second
embodiments.
[0028]
FIG. 2 is a front view of the first embodiment of the present invention.
In the figure, 2 is a keyboard, 6 is a sound collecting microphone, 7L is an upper left middle and
high pitch speaker, 7R is an upper right middle and high pitched speaker, 8L is a middle left
upper middle and high pitch speaker for a performer, and 8R is a middle right performer It is a
middle and high-pitched speaker for use.
[0029]
Further, 9 is a keyboard lid, and 10L and 10R are slits of middle and high pitch speaker
attachment portions at the upper left and right, and 11L and 11R are slits of central high and low
pitch speaker attachment portions at the left and right.
[0030]
In the upright type piano according to the present invention, slits 10L, 11L, 10R and 11R are
provided at the attachment positions of the speakers 7L, 8L, 7R and 8R as shown in the figure,
and the speakers are attached to these parts to The sound is configured to be emitted directly to
the outside.
[0031]
Further, the sound collecting microphone 6 is mounted so as to be close to the strings 4 in the
middle and high range parts and to be opposed to the strings 4 so as to pick up the sound of the
high range directly.
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[0032]
The speakers 7L, 8L, 7R, and 8R of the reproduction device unit are middle to high frequency
range speakers.
Considering that the sound to be reproduced has a high-frequency component and strong
directivity, as shown in FIG. 2, a slit is provided on the front plate 1 of the front of the upright
piano, and the slit is placed in the slit.
[0033]
In the figure, 7L and 7R are speakers for the viewer, and the speakers 8L and 8R are for the
performer.
By installing in this way, wide directivity can be secured.
[0034]
FIG. 3 is a schematic block diagram showing the internal configuration of the upright piano of
the first embodiment.
In the figure, 12 is a preamplifier, 13 is a high pass filter (H.P.F.) for taking out the middle and
high frequency range part, 14 is a pseudo stereo device, and 15L and 15R are left and right
amplifiers.
[0035]
In this configuration, when the player plays the keyboard 2, the hammer 4 strikes the strings 4
by the mechanism of the upright piano, and the strings 4 and the soundboard 3 vibrate to
produce sounds.
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The sound produced is placed opposite to the string 4 and collected by the sound collection
microphone 6.
[0036]
The picked up sound is amplified by the preamplifier 12, the bass region is cut by the high pass
filter 13, the stereo is formed by the pseudo stereo device 14, and it is amplified by the
amplifiers (main amplifiers) 15L and 15R. , 7R, 8L, 8R.
[0037]
As described above, by reproducing the sound generated from the string 4 by the speakers 7L,
8L, 7R, 8R, it is possible to realize a sound having a high-pitched range and an expansion like the
grand piano.
[0038]
Although the pseudo stereo device is for converting a monaural signal into stereo, and the
pseudo stereo device is used in the present embodiment in order to obtain the spread of sound, it
may be omitted to perform monaural reproduction.
[0039]
In the present embodiment, the left and right speakers are provided at the upper and central
portions, and the upper speakers 7L and 7R are mainly for the viewer, and the central speakers
8L and 8R are mainly for the performer. The number and arrangement of are not limited to this,
and may be changed appropriately according to the purpose.
[0040]
Further, in the present embodiment, since the sound generated from the string 4 contains a lot of
middle to high tone components, in order to reproduce the spread of the sound, the stereo is
realized by the pseudo stereo device. May be reduced.
[0041]
Next, a second embodiment will be described.
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[0042]
FIG. 4 is a front view showing the arrangement of the main part of the upright piano of the
second embodiment.
The difference in appearance between the upright piano of this embodiment and the first
embodiment is that the microphones 6L and 6R disposed for the strings 4 are respectively
disposed one on the left and two on the left. Since the basic configuration is the same as in the
first embodiment, the description of the name function of each part will be omitted.
[0043]
FIG. 5 is a schematic block diagram showing the internal structure of the upright piano of the
second embodiment.
As shown in the figure, in the present embodiment, the left and right microphones 6L and 6R, the
preamplifiers 12L and 12R, the high pass filters (H.P.F.) 13L and 13R, and the amplifiers 15L and
15R are provided separately in separate systems, respectively. The sounds emitted from the
strings 4 are separately generated from the left and right speakers 7L, 8L, 7R, 8R, respectively.
[0044]
By configuring in this way, the sounds produced from the left and right can be emitted from the
left and right speakers, so the spread of the sound and the localization of the sound image can be
increased, and the presence can be further enhanced.
[0045]
According to the present embodiment, the cost is higher than in the monaural system and the
pseudo stereo system, but since the high sound emitted from the bass part can also be collected,
it becomes closer to the sound of the grand piano.
[0046]
Further, by providing a reverberation circuit (reverberation) effect may be added to provide a
wider sound.
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[0047]
Furthermore, the number of installed sound collecting microphones and the installation position
thereof are not limited to the present embodiment, and may be changed as required.
[0048]
In the present embodiment, the speakers 7L, 8L, 7R, 8R are attached to the upper part and the
central part, and the speakers 7L, 7R in the upper part are emitted mainly to the viewer and the
speakers 8L, 8R in the central part to the speaker. However, the present invention is not limited
to this, and the number and mounting position of the mounted speakers may be changed as
appropriate.
[0049]
As described above in detail, according to the present invention, the sound produced is picked up
by the pickup microphone, the high frequency range component is taken out by the high pass
filter, and the sound is emitted directly to the outside by the speaker.
As a result, it is possible to provide an upright piano that can obtain high sound quality and
sound spread like a grand piano while making use of the small size and low price characteristics
of the acoustic piano.
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