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JPS54107725

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DESCRIPTION JPS54107725
Description 1, title of the invention
Microphone device
3. Detailed Description of the Invention The present invention relates to a microphone device v1,
particularly one capable of changing the angle of its directivity direction. As is well known, for
example, by installing two single directional microphones in one microphone unit, it is possible to
configure the whole one-pin microphone system having directivity in 12 directions. Such a
microphone device is particularly applicable to stereo, but for example, how wide the position of
the sound generating vinegar is V + with respect to the position where the microphone device is
placed is Kj. If the angle of directivity direction of the two microphones can be freely changed, a
better stereo effect can be obtained and it is very convenient. SUMMARY OF THE INVENTION It
is an object of the present invention to provide a very good microphone device in which the
angle of the directivity direction can be arbitrarily changed as desired. First, EndPage: 1, which
briefly explains the gist of the present invention, has a pair of microphones at one end and a
holding portion at the other end, and is supported so as to be pivotable against each other in the
middle portion A pair of support members in the shape of a letter "R" Then, the holding portions
of the pair of support members are movably supported in a direction substantially orthogonal to
the middle direction of the pair of microphones, and a movable member movable in the middle
direction of the pair of microphones from itself is It is characterized in that the angle of
directional force direction is varied as desired in providing. Hereinafter, the -X embodiment of
the present invention based on the above effect will be described in detail with reference to the
drawings. In FIG. 1, 11.12 is a pair of microphones, for example, having uni-directionality. These
microphones 11.12 are respectively fixed to one end of a pair of support members 13.14
installed in a back-to-back relationship with each other in the shape of a circle fA. The supporting
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members 13.14 are rotatably supported at their corner portions by a microphone unit # (shown
by a dotted line in FIG. 11). Further, at the other end of the supporting member 13.14, engaging
bins 17.18 are provided, which are engaged by the engaging portion. The holding bin 17.1871-1
is slidably fitted in a long hole 20.21 formed on the front substantially cross-shaped movable
member 190 both Il1 sides 191 and 192. Further, in the movable member 19, the slide portion
193 extending upward in the figure is inserted into the slide groove 22 in the microphone unit
(11, the middle direction of the microphone 11.12, ie, the arrow A in the figure). , And B are
made movable.
Further, an operating element 23 is provided at a portion of the movable member 19 extending
downward in the drawing, and the operating element 23 protrudes to the outside of the
microphone unit (1). The operation element 23 is slidably fitted in the long hole 25 of the
resistance member 24 provided on the surface opposite to the movable member 19 in the
microphone unit (.box-solid.), So that two slides described later The resistor RItRt ′ is
configured. Here, FIG. 2 shows a connection diagram of the microphone 11 ° 12 and the sliding
resistance, and one signal line of the microphone 11.12 is connected to one input end of the
microphone plug 26.27. It is connected together via the said sliding resistance R1 + R1. The
connection point is connected to the other signal line, which is the ground line of the microphone
11.12, and the other input end, which is the ground end of the microphone plug 26. 27, and is
grounded. And the circuit of the above-mentioned composition constitutes mixing circuit (If)
'which mixes the output level of microphone 11.12. The sliding resistance R1eR1 has both small
resistances when the operating element 23 is moved in the direction indicated by arrow A, and
the resistances R1eR1 both increasing when the operating element 23 is moved in the direction
indicated by arrow B. It is a thing. Also, FIG. 3 shows one implementation example of the
microphone device having the above-described configuration and circuit. The operation of the
above-structured microphone device will be described. First, the operating element 23 is slid in
the main direction indicated by the arrow A or B in FIG. Then, the holding bin 17.18 of the
support member 13.14 slides in the long hole 20 ° 2 of the movable member 19 in the direction
indicated by the arrow C or D, and the direction indicated by the microphone 11.12 by the arrow
E or 7tflF. , To rotate. Therefore, by sliding the operation element 23, the angle of the directivity
direction of the microphone 11.12 can be varied as desired. Here, when the operating element
23 is slid, the resistance values of the sliding resistances R, R are simultaneously changed. Now,
when the operator 23 is moved in the direction indicated by the arrow A, the two microphones
11.12 approach and the angle of the directivity direction decreases. At this time, as described
above, the resistance value of each sliding resistance R1 * R1 decreases, and the series combined
resistance of the sliding resistances R1 * R * decreases. Then, the sound signal picked up by each
microphone 11.12 is easily mixed via the sliding resistance EndPage: 2 anti-Rt * Rt (ie, the mixing
level becomes high).
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Further, conversely to the above, when the microphones 11.12'i move away from each other, the
mixing level becomes lower. For this reason, for example, when the sources of sound are widely
distributed at a wide angle, if the angle in the directivity direction of each microphone 11.12 is
increased, the mixing level becomes lower, so that both microphones 11.12 An acoustic signal is
obtained via the microphone plug 26.27 '. In addition, when the sources of sound are
concentrated in substantially one direction, if the angle in the directivity direction of each of the
microphones 11.12 is reduced, the mixing level becomes high, and so almost the same sound
from both microphones 11.12 A signal is obtained via the microphone jack 26.27f. Therefore,
when the microphone plug 26.27 is connected to, for example, a stereo sound system or the like
to perform enlargement and reproduction of an acoustic signal, it is possible to clarify the
position of the sound source, that is, the localization of the sound image. In addition, even in the
case where both microphones 11.12 are completely directed upward in FIG. 1 and used as a
single microphone in relation to this, the output signal levels from both microphones 11.12 are
the same, for example, due to stereo imaging. It is very effective for monaural recording etc. The
present invention is not limited to the above-described embodiment, and various modifications
can be made without departing from the scope of the invention. Therefore, as described above in
detail, according to the present invention, it is possible to provide a very good microphone device
in which the angle of the directivity direction can be arbitrarily varied as desired.
4. Brief Description of the Drawings FIG. 1 is a front view 1 showing an embodiment of a
microphone device according to the present invention, FIG. 2 is a circuit diagram of the
embodiment, and FIG. 3 shows an embodiment of the present invention. FIG. 11.12 ...
Microphone, 13.14 ... Support member, 15.16 ... Rotating shaft, 17.18 ... Engagement bin, 19 ...
Movable member, 20.21 ... Long hole 22 22 slide groove 23 operator 24 resistance member 25
long hole 26. 27 microphone plug Microphone unit R 7 ° R , ... sliding resistance. Applicants
Attorney Attorney Takehiko Suzue Figure 1 Figure 2 Year 2 Figure EndPage: 3
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