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The present invention relates to a microphone apparatus which can be shared by a
superdirective microphone and a one-point stereo microphone. Heretofore, a device configured
as shown in FIG. That is, it has an axial direction in the same direction, and has a predetermined
interval ?, and each has a single-directional ? ? like a broken line shown. A phase shift
processing circuit pit is provided which arranges two microphone units M ? e M t * and
provides low-pass component t-180 ░ slow grinding on the output side from the microphone
unit M ? located relatively forward. In this state, an electronic superdirective output can be
derived from the output terminal OUT by taking a difference from the output from the rear
microphone unit M1 by means of the metal network DD. However, while conventional
microphone devices such as the one described above have two microphone units at an angle,
their operability tends to be significantly impeded because they can only be used for directivity.
Therefore, the present invention has been made in view of the above points, and is commonly
used for superdirective microphones and one-point stereo microphones, and hence it is possible
to use the slow motion. It with reference to the 0 following drawings are intended to provide a
very mourning good composed microphone apparatus can contribute to the improvement will be
described in detail one embodiment of the present invention. That is, in FIG. 2, M, M, and M are
spaced from each other by a predetermined distance, and are unidirectionally arranged so as to
be pivotable 60 ░ or 1200 in the counterclockwise direction at least in the counterclockwise
direction as shown broken lines. A microphone unit having The respective output ends of the
microphone unit M1 located in the front and the microphone unit Mn located in the rear are
correspondingly connected to the movable contacts C, C of the first 1 'and the second
changeover switch gl, s, respectively. First and twentieth changeover switches 8.. . 8t are
connected corresponding to each superdirective side contact & 1m & 1 through the phase shift
processing circuit pal or directly to each input end C-), (+) K of the mixed circuit group DD, And,
in the above mixed circuit DD, ?l s? kl is connected to each one point stereo side contact of the
third and fourth changeover switches 58 a B 4 corresponding to each one point stereo side
contact baeb and y c of the respective one point stereo @ contacts. The output end is bifurcated
into the third and fourth changeover switch islands s. Further, the movable contacts C, C of the
above-mentioned jI 3 and the fourth changeover switch 11 aa 84 are connected corresponding to
the respective superdirective side contacts & j's a 4 of 84, and the respective monoral outputs fi
of the superdirective output (Ding e!
The left and right tunnel output terminals of Wonts) and one-point stereo output are connected
correspondingly to the first and second output terminals OUT, OUT which are also used as Rt. In
the above, the first to jI4 changeover switches 8. -8 shall be interlocked with each other, and
these swings? Each microphone unit M, when 81-B, is set to each superdirective side contact a, ~
a, [? is made in the position of the illustrated solid line in which the axial direction is in the same
direction mutually, The same switch 81-1! When the number is set to each one-point stereo
contact point, etc., each microphone enit M,... M is made in the position of the broken line shown
by rotating the axial direction to 60 ░ t or 120 @ respectively. First to fourth changeover
switches 8. ???????????????? ???? It is assumed to be interlocked with the
axial direction setting mechanism (not shown) of l. Therefore, in order to obtain the
superdirective output in the above configuration, the first to fourth changeover switches sK to 84
t-may be set to superdirective @ line points a and -a respectively 0, ie, this Placed at a
predetermined distance 4f from each other, the two microphone devices having the positions
shown by the solid lines in the same direction as the axial direction are located at the front
among the outputs from Kn-Wim. The lower side bell is delayed by 1110 "through the phase
shift processing circuit Fall, and the output on the rear side is the tto state of each input end (-) of
the mixed circuit DD. By being supplied to +), the difference component between the two is
derived from the output end of the mixing circuit DD as a monoural output having
superdirectivity to the true output terminals OUT and OUT respectively. To obtain a one-point
stereo output, the first to fourth changeover switches 81 to 84t may be respectively set to onepoint stereo side contacts, and may be set to ~ b4 0, ie, in this case, with a predetermined interval
4 mutually Are different from each other by 90 ░ in the direction different from that when
obtaining the above-mentioned superdirectivity. In which the outputs from the down unit M
pictmap 1M proverb is derived as the stereo output of the left and right channels in the 11-car
output 0?Ts 5OUT1. FIG. 3 shows an embodiment of noodles according to the present invention,
and the second and forty-fifth switches 8. . Instead of omitting Ss, the characteristic of the true
output system is obtained by inserting the characteristic compensation circuit C0MPt- between
the first and third changeover switches S, S which switch the output system of the front
microphone device Me). It is possible to obtain the same function and effect as the case of FIG. 2
by the combination of the two microphones described above.
M, specific example 1 to store in a box, a is a box shape case taking into consideration that both
axial directions are different by 90 @ when obtaining super-possession output and obtaining onepoint stereo output That's the case. However, the two microphones M located forward! 1 is fixed
and the microphone airet M located at the rear is rotatable at 180 ░. t q and b are set to move
forward so as to be juxtaposed with the microphone units M ? t II t 1 ? located at the back
when the one-point stereo output is to be obtained. By making it a wedge structure, it can be
realized even by a so-called rod-like microphone type, and the following is 0. In the above, when
obtaining a one-point stereo output, the angle formed by two microphones ? M ? 1M ? is 120
░ Not limited to this, it may be variable up to 180 '(see FIG. 4 (a))% 6 G @ 11 degrees, and
various modifications and applications are possible without departing from the scope of the
present invention. There is no point to say. Therefore, according to the present invention, it is
possible to use the superdirective microphone and the one-point stereo microphone in common
according to the present invention, and thus an extremely good microphone device tube which
can contribute to improvement of operability. 0 that can be provided
Brief description of the drawings
FIG. 1 is a diagram showing the basic construction of a superdirective microphone according to
the prior art, FIG. 1 is a diagram showing the construction of a microphone according to an
embodiment of the present invention, and FIG. Fig. 4 is a schematic diagram showing the
principle construction, and Fig. 4 is #!
It is a figure which is an example t-drive of the storage form of two microphone units used for
FIG. ',': Ellid, Mn-.. S S4 иии Switch, p-и и phase shift processing circuit, ADD и и и mixing circuit, OUT,
OUT и и и и output terminal. Applicant agent Patent attorney Suzue Takehiko Figure 4 (a) (b)
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