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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a
microphone for three-dimensional recording, which records sound images in the same manner as
the human ear can hear them, and reproduces natural sound fields around the listener during
playback. It is about
2. Description of the Related Art Conventionally, a microphone is embedded in both ears of a doll
called a dummy head microphone looking down on the head and chest of a human, the object
sound is recorded, the sound processor is corrected by a dedicated processor, and a realistic
sound field is reproduced. The device to be tried is used. This is based on the idea of trying to
record as close as possible to what is heard by the human ear. When the human ear recognizes
the stereo localization of the sound image, the difference between the sound information input to
the left and right ears is a large factor. That is, a three-dimensional effect is expressed by how
much the sound emitted from the sound source is input to the left and right ears and the time
difference. Therefore, in order to make the recording system similar to the state of the human
ear, by attaching a microphone to the doll's ear imitating the head and chest, it was tried to
reproduce the sense of localization of the left and right of the sound.
The inside of the doll-shaped body of the conventional dummy head microphone is hollow, and
the sound input to the microminiature microphone attached to one ear is transmitted to the
inside of the body to the microminiature microphone of the other ear Will also be recorded. In
addition, the sound input from both ears resonates inside the main body, and the localization of
the left and right sounds was ambiguous at the time of reproduction. Also, if the doll body is a
solid statue, the interference between the left and right sounds is not transmitted at all inside the
body, but transmitted only from the outside, so the condition that sound is recorded in the same
condition as listening to human ears is I was not satisfied. In addition, it can not express well
about the ups and downs of sound at the time of reproduction. In order to correct those
ambiguities, various acoustic devices such as hooking up effectors by a dedicated processor were
required. In addition, when recording outdoors, human head and chest dolls are large and
difficult to handle.
The structure of a conventional three-dimensional recording microphone called a dummy head
microphone has the following drawbacks. (A) When reproducing sound, the sense of localization
on the left and right is vague, and the sense of localization on the upper and lower sides can not
be expressed at all. (B) Since the interior of the doll body is hollow, the sound input to the
microphone of one ear is transmitted to the inside and recorded to the microphone of the other
ear. Furthermore, the sound input from both tends to cause resonance inside the doll body, and
the sense of localization at the time of reproduction becomes ambiguous. Also, in the case of a
doll whose interior is not hollow, unlike a human head, no sound is transmitted naturally through
the interior of the head, so a natural three-dimensional effect can not be reproduced. Therefore,
sound correction by a dedicated processor is required. (C) When used for natural sound
recording outdoors, the conventional dummy head microphone is large and difficult to carry. (D)
In the case of manufacturing, the molding of the doll is complicated, and the cost is high due to
the need for an attached processor. The present invention is intended to solve these problems,
and it is possible to record natural sounds and music in general more realistically and easily, and
those who play and listen to them can record the sounds as if they were in the room. It is an
object of the present invention to provide a microphone for three-dimensional sound recording
that allows the user to experience an immersive feeling as if in a situation.
SUMMARY OF THE INVENTION In the present invention, microminiature microphones attached
to the left and right of the doll body are arranged slightly offset up and down from the horizontal
position of the central point. This caused a slight difference in the sound reaching the
microphone, enabling clear recording of the direction of the upper and lower sounds as well as
the left and right, enabling the reproduction of the left, right, upper and lower feeling.
Also, how to attach each microminiature microphone, insert a hole in the tip of the conical shape
so that the sound collector of the microphone is inserted, and insert it into the attachment holes
opened on the left and right of the main body. In addition, the direction of the sound to be
recorded could be clearly reproduced by attaching a paraphragm so that the outer circumference
of the opening of the hole in which the microminiature is embedded is half-enclosed and adding
the parabolic sound collecting function.
Also, conventionally, sounds input to the left and right microminiature microphones are
transmitted to the inside of the main body to cause resonance. The closer to the structure of the
sound of this human being to the structure of the human head, the more natural the threedimensional sound will be reproduced, so the contents inside the human skull inside the hollow
main body As an alternative to the above, gel, semisolids, liquids, etc. are filled. By this, the way
of the sound input from the right and left inside the main body became more natural, the
resonance of the extra sound was eliminated, and the ambiguity of the localization of the sound
was eliminated. In addition, it becomes unnecessary to use an audio device for compensating and
processing sound such as a conventional processor, and three-dimensional sound recording and
reproduction can be performed more efficiently.
In addition, since the main body is not a doll imitating a human head and thorax but any
container capable of being filled with the contents, the same effect can be obtained with a simple
shape such as a sphere, an oval sphere, a cylinder, or a cube. Furthermore, as a result of the
experiment, even if the size was smaller than the size of a human head, a sufficient threedimensional effect could be expressed. Therefore, when collecting natural sounds outdoors,
carrying and handling the microphone becomes easier than conventional ones, and there is no
need for a doll-shaped molding or processor, so the cost can be reduced.
invention will be described in detail with reference to the drawings. First, FIG. 1 shows the
configuration of the microphone for three-dimensional recording according to the present
embodiment. In the figure, the body 1 is a container with an internal cavity, into which a conical
mini microphone attachment 2 is incorporated.
FIG. 2 shows a detailed configuration of the microminiature microphone attachment unit 2. 2 has
a hole at the apex of the conical shape in which the sound collecting portion of the
microminiature microphone 3 is half embedded. The small microphones are inserted in such a
manner that the sound collectors are directed inward, and when attached to 1, the sound
collectors come into contact with the gel 8 inside. A hole for the cord 4 of the microminiature
microphone is made in 2 and the cord is taken out from there. The hole 5 for inserting 2 is
provided with a flap 6 so as to surround half of the outer periphery of the opening. This makes
the microphone part like a parabolic sound collector, so it is very effective in sound collection.
The center point 7 of the front of the main body 1 is determined and slightly shifted from the
horizontal line of 7 to open the microphone mounting hole 5 at the left and right positions. In the
case of a sphere, the main body 1 is made to combine containers divided into hemispheres. In the
case of boxes of other shapes, provide a lid. Before the main body 1 is sealed, the amount 8 of gel
obtained by removing the volume of the micro microphone attachment portion 2 on the left and
right from the internal volume of the main body is put into the inside of 1. The micromini
microphone mounting portion 2 is incorporated into the left and right holes of the main body 1
and fixed to the opening. The left and right cords 4 pass between the inner wall of the main body
1 and the plastic bag 8 and pass through the hole in the main body of the surface in contact with
the grip 9 which is emptyed out into the inside of the body 9 and out from below. Let's do it. This
way, the code does not get in the way of recording.
What is filled inside the main body 1 may be liquid or semisolid other than gel. Further, the
shape of the main body 1 may be an elliptical sphere, a cylinder, a cube, or a rectangular, as well
as a sphere, which can be easily molded.
FIG. 3 shows the state when using the system of this embodiment. If you want to record in the
same way as a recording person is listening to an object sound, hold the microphone grip, face
the center of the microphone, and record toward the direction of the object sound where the
recording person is facing. If you always act with the microphone pointing in the same direction
as the recording person's face, you will be able to reproduce the sounds and sensations that the
recording person has experienced.
According to the present invention, in order to more realistically reproduce the sound as heard
by the human ear, the small microphones attached to the left and right are respectively slightly
shifted up and down from the horizontal position. Not only the sense of right and left but also the
sense of up and down can be expressed. In addition, with regard to how to attach the
microminiature microphone, the two microminiature microphones are directed inward, and the
edge of the circle of the hole of the main body is erected outward to form a parabolic sound
collector. You can also clearly record the directionality of the sound. In addition, ambience of
sound localization during reproduction is resolved by filling gel as a substitute for the contents of
the skull inside the main body to which the microminiature microphone is attached in order to
bring it closer to the human head. The Furthermore, unlike the conventional case, it is not
necessary to adhere to only the outer shape and use the doll shape, and the shape can be
simplified and miniaturized. Therefore, it is easy to carry and convenient when recording natural
sounds outdoors.
Also, when I experimented in practice, when I make a sound around the microphone with the
above configuration and record it, I feel that the sound goes round and round the listener's head
during playback, and the head follows along with it. I felt a sense of going around. In addition,
when the recording person sprints while riding on a bicycle holding a microphone, especially
when listening with headphones during playback, not only the sound of the wind but also the
feeling that the wind hits the face (microphone body) and blows backwards I was able to play in
real. There was an effect that it was also possible to reproduce the feeling of skin other than the
hearing at the time of recording and the feeling of pressure hitting the ear, which could not be
reproduced by the conventional three-dimensional recording.
Brief description of the drawings
1 is a perspective view of the present embodiment.
2 is a diagram showing a detailed configuration of the small microphone attachment portion 2 of
the present embodiment.
3 is a diagram showing an example of use during recording of the present embodiment.
Explanation of sign
DESCRIPTION OF SYMBOLS 1 main body 2 microminiature microphone attachment part 3
microminiature microphone 4 cord 5 hole which was opened in the main body 6 centering 7
plastic gel 9 grips with center point 8 gel
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