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JPH11331977

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DESCRIPTION JPH11331977
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
microphone and a method of picking up a microphone, and more particularly to a microphone
and a method of picking up a microphone capable of detecting the direction of collection of a
directional microphone.
[0002]
2. Description of the Related Art In conventional microphone recording, the direction of the
sound collection direction of a directional microphone is set by visual measurement of the
vertical and horizontal directions of the microphone. In particular, with directional microphones,
setting must be done with caution as slight angular deviations in the setting lead to a reduction in
the response of the sound pressure from the collected sound source.
[0003]
In particular, when recording for a long time, the holder supporting the microphone may move,
and the direction of the microphone relative to the musical instrument of the sound collection
source may be shifted. In this case as well, it was necessary to adjust the setting by visual
observation. In addition, when setting the microphone at a certain distance from a sound
collection source such as a musical instrument, it is difficult to confirm that the front axis of the
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microphone is correctly directed in the sound collection direction.
[0004]
In general, high frequency sound sources emitted from collected sound sources, particularly
sound sources at or above the upper limit of the audible band, have narrow directivity, and
therefore the directivity of the microphone to them is also narrow. Therefore, in response to a
demand for a microphone corresponding to a wide frequency band in the future, a demand for
position control of the microphone in the sound collection direction is extremely high because
the sound collection direction matching the directivity of the microphone is accurately detected.
[0005]
SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present
invention to provide a microphone and a microphone sound collection method in which the
direction of the collected sound source is accurately detected and position control is performed
in the directivity direction. It will be an issue.
[0006]
A microphone according to claim 1 is a microphone having directivity, and is characterized by
having a light source for emitting a light beam on the directivity front axis of the microphone.
[0007]
The microphone according to claim 2 is a directional microphone, and the microphone has a
support, and the support has a light source for emitting a light beam on the directional front axis
of the microphone. .
Preferably, the support is one of a microphone holder and a suspension.
[0008]
In the microphone of claim 1 or claim 2, it is desirable that the light source is a laser pointer.
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[0009]
The microphone sound collection method according to claim 5 is a microphone sound collection
method having directivity, wherein a light source is provided to the microphone, and a light beam
is emitted from the light source onto the directivity front axis of the microphone, The position of
the microphone is controlled by detecting the direction of the collected sound source.
[0010]
The microphone sound collection method according to claim 6 is a microphone sound collection
method having directivity, wherein the microphone is supported by the support, and a light
source disposed on the support from the light source on the directivity frontal axis of the
microphone The position of the microphone is controlled by detecting the direction of the
collected sound source while emitting the light beam.
Preferably, the support is one of a microphone holder and a suspension.
[0011]
In the microphone collecting method according to claim 5 or 6, it is desirable that the light
source is a laser pointer.
[0012]
The operation of the above-described means will be described below.
According to the microphone of claim 1 and the sound pickup method of the microphone of
claim 5, the light beam from the light source disposed in the microphone can be used to easily
detect the point on the directivity front axis of the microphone. It is possible to record while
controlling the position easily in the direction of the sound source.
According to the microphone of claim 2 and the sound pickup method of the microphone of
claim 6, it is possible to easily detect the point on the directivity frontal axis of the microphone
by using the light beam from the light source disposed on the support of the microphone. A
conventional microphone can pick up a sound while easily controlling the position of the
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microphone in the direction of the sound collection source.
[0013]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present
invention will be described below with reference to FIGS. 1 to 4 which is an example of
implementation of a microphone and a microphone sound collecting method.
The present invention is not limited to these embodiments.
[0014]
Embodiment 1 As shown in FIG. 1, this embodiment is an example in which a light source 2 such
as a laser pointer is incorporated into the vertical microphone 1. That is, a light beam emitting
unit 4 such as a laser beam of a laser pointer is provided near the microphone unit 3 which is a
sound collecting unit, and a light beam such as a laser beam can be emitted on the directivity
frontal axis of the microphone 1 . The laser pointer includes, for example, a light beam emitting
unit 4 which is a semiconductor laser of visible light, a laser driving unit (not shown), and a laser
beam on / off switch. If unnecessary noise may be generated, the laser driving unit can be
provided separately from the microphone 1 using an optical fiber or the like.
[0015]
The sound collecting method using the above microphone 1 is, as shown in FIG. 2, a light beam 6
such as a laser beam emitted from the light beam emitting unit 4 of the microphone 1 toward the
collected sound source 5 such as a piano. Since the spot 7 points to a point on the directivity
frontal axis of the microphone 1 with respect to the collected sound source 5, the direction of the
collected sound source 5 is displayed by the spot 7 if visible light such as a red semiconductor
laser is used as the light source 2 However, the position of the microphone 1 can be controlled to
coincide with the directivity frontal axis direction of the microphone 1. If the light beam 6
interferes with the sound source 5 during sound collection after setting the position of the
microphone 1 in advance, the on / off switch may be turned off. The position may be set by
turning on the off switch.
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[0016]
Therefore, the setting of the microphone 1 in the sound collecting direction can be performed
accurately, and the time required for the setting can be significantly reduced. Further, since the
light beam 6 such as a laser beam using a laser pointer has little diffusion, it is possible to
indicate the point of the directivity frontal axis even if the distance between the microphone 1
and the collected sound source 5 is separated to some extent. Further, by monitoring the position
of the spot 7 in the sound collection source 5, even if it is necessary to adjust the position of the
microphone 1 during sound collection, it is possible to visually confirm how much it has changed.
Furthermore, even if the position of the microphone 1 changes for some reason during sound
collection, it is possible to easily return to the original position by remembering the position of
the spot 7.
[0017]
Embodiment 2 As shown in FIG. 3, this embodiment is an example in which a light source 2 such
as a laser pointer is incorporated in a horizontal microphone 1. That is, since the light beam
emitting unit 4 of the light source 2 such as a laser pointer is provided in the vicinity of the
microphone unit 3 and the light beam 6 such as a laser beam can be emitted on the directivity
frontal axis of the microphone 1 The microphone 1 can be easily set while accurately monitoring
the direction of sound collection by the spot of the light beam 6 at.
[0018]
Embodiment 3 As shown in FIG. 4, an example in the case where a light source 2 such as a laser
pointer is attached to a support 8 such as a suspension near the main body of the microphone 1
is shown. Also in this case, since the light source 2 is disposed in the vicinity of the microphone
1, the spot of the light beam 6 can point to a point on the directivity front axis of the microphone
1. Also, as the support 8, a microphone holder can be used instead of the suspension. Therefore,
even if the conventional microphone 1 not incorporating the light source 2 such as a laser
pointer is used, it is possible to control the position of the microphone 1 while monitoring the
directivity front axis direction of the microphone 1.
[0019]
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Embodiment 4 In Embodiment 3, when a light source 2 such as a laser pointer is attached to a
support 8 such as a microphone holder or a suspension, a position control mechanism (not
shown) that can be remotely controlled is disposed on the microphone holder or suspension. If
set, the spot of the light beam 6 such as a laser beam from the light source 2 is applied to the
collected sound source to visually confirm the directivity frontal axis direction and remotely
control the position of the microphone 1 in the sound collecting direction. can do. If such a
position control mechanism is used, for example, even when the microphone 1 is hung from the
ceiling and collected, there is no need to move down and adjust the position of the microphone 1
one by one. The time required to
[0020]
In the above embodiment, a laser pointer that emits a light beam 6 such as a laser beam is used
as the light source 2, but the output power of the laser beam is a power that does not affect the
sound collection source 5 and the laser It is desirable that the beam spot 7 have a distinguishable
power. Also, instead of a laser beam, a light source 2 that emits a light beam 6 focused by white
light can be used.
[0021]
According to the microphone of the first aspect and the sound collecting method of the
microphone of the fifth aspect, since the directivity front axis direction of the microphone can be
easily detected, the position control of the microphone in the direction of the sound source can
be easily performed. be able to. According to the microphone of claim 2 and the method of sound
collection of the microphone of claim 6, the directivity front axis direction of the microphone can
be easily detected, so that the position control of the microphone in the direction of the sound
source using the conventional microphone is easily performed. can do.
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