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??? ? 1. Use field of this January January 1, video camera, am, / m camera, etc., provided
with a camera or large +1 jl, use 11 easy to use, and an excellent collection of stereo effect is 11
It relates to a microphone that is perfect. Example of the production of rice and its problems Fig.
1 Il'ifY This kind of microphone is shown. In FIG. 1, reference numeral 1 denotes a unidirectional
microphone (hereinafter referred to as Mid microphone), and this Mid microphone 1 is housed in
a cylindrical case 2 IIX. The direction of the Mid microphone 10 is orthogonal to the central axis
of the Mid microphone 1 or the central axis of the case 2. Reference numeral 3 denotes a bidirectional microphone (hereinafter referred to as "5icle microphone") housed in the case 2. The
direction of the 5ide micro 71 or 3 is such that the central axis thereof is orthogonal to the
central axis of the case 2 Orientation different by 90 ░ with respect to the central axis of 1. Mid
microphone 1 and 5ide microphone 3 are respectively amplified by amplifiers 4 and 5 as shown
in FIG. 2, then added and subtracted by adder 6 and subtracter 7 to become left and right output
signals. The circuit 8 in FIG. 2 is housed in the case 2. FIG. 3 shows the directivity-turn of the
above-mentioned microphone, and it has a good effect on the stereo effect; However, if the
above-mentioned conventional microphone is to be accommodated in a video camera C: ? video
camera, as shown in FIG. There was a drawback. IvJ's 1 "book-light 1 is to eliminate the
drawbacks of Toki ?, to prevent upsizing of the camera, to use a microphone that is good for
first-hand, and capable of sound collection with excellent stereo effect? ?? ? ?]]] ?. In
January's + 1'41 ? IJ1 is housed in a cylindrical case, with its central axis aligned with the
central axis of its 11 cases, and its bi-directional The microphones are accommodated on the
central axis thereof so as to be orthogonal to the central axis 111 of the case, and the output of
the lit: / no of the above-mentioned Cl1- directional microphone and the outputs of the
bidirectional microphones are stopped. , Subtractor-addition-subtraction-J-r +: t +: l ? ? ? ? ?
or ?J'rE?.
DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will
be described below with reference to FIGS. In FIG. 6, 1 'is a Mid micro-bon, and the orientation of
this Mid microphone 1' is the same as that of its central axis or the central axis of the case 2.
???? It is a 5 fde microphone, and the direction of the 5ide microphone U-pon 3 'is such that
the central axis thereof is orthogonal to the central axis of the case 2. FIG. 6 shows the electric
circuit of this embodiment. 10 to 13 are phase shifters. FIG. 7 shows the directivity pattern of the
microphone of this embodiment. In this embodiment, since the central axis of case 2 is directed
toward the striding direction, as shown in FIG. 8, it can be accommodated in parallel to the video
camera, and it has fat hair. In order to prevent the reduction of the stereo effect due to the
difference between the distance between the mid microphone 1 'and the sound source and the
distance between the 5ide microphone and the 11f source, it is necessary to have a height of 1 t.
It is for supplementing the statement. Also, depending on the frequency), the phase difference by
the path difference is different, but correspondingly (the multiphase device is also arranged by
the frequency, etc.). Note that the phase shifter is not necessarily limited to four. The effect of L1
1 As described above, according to the invention, since the I / integral height is IIJ ability, and
the center + ii + l + of the cylindrical case is picked up in the direction of i'r 'dlli, the video- It is
convenient to use even when it is installed on the snow.
Brief description of the drawings
FIG. 1 is 1. r at the end of the microphone ? r + I (Fig. 7, Fig. 2 is an electric circuit diagram of
the microphone, Fig. 3 is a diagram showing the directivity pattern of the microphone, and Fig. 4
is a video of the microphone 11111 is a view showing a state in which the camera e has collected
1 ? 1 ?, FIG. 5 is a perspective view of four parts of the microbon in one embodiment of the
unfired 11J1, FIG. 6 is a city of the same microphone; A diagram showing the directivity and li
pattern of the same microphone, and FIG. 8 shows a video camera of the same microphone
collected (= J-shaped!
It is a side view of lending an island. 1 'и и и и l'-directional microphone, 2. и и и и и и и и и и и и bidirectional microphone, 4, 5 и и и и и и и и и и и и и и и ииииииииииииииииииииииииииииииииииииииииии Adder, 7 ииииииииииииииииииииииииии Video
camera, 10 to 13 ииииииииииииииии Phase shifter. Name of Patent Attorney Patent attorney Toshio Nakao
has 1 person Figure 1 Figure 2
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