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JPH06335081

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DESCRIPTION JPH06335081
[0001]
[Industrial field of application] In a suspended microphone device capable of arbitrarily setting
the position and height of the microphone by changing the length of the cable in the hall or
studio of the broadcasting station, not only the position and height of the microphone but also
the horizontal position The vertical angle can also be adjusted to obtain better sound effects.
[0002]
2. Description of the Related Art In order to pick up a sound at the best position in a hall or a
studio, a microphone is suspended by a cable of an arbitrary length, and a device called a
suspended microphone is often used to adjust the position and height of the microphone.
Generally, a method called a three-point suspension microphone device is widely used, and a
cable is drawn from the three fulcrum points to a common point on the ceiling surface of the
stage, a microphone is suspended at this common point, and the cable length is arbitrary using a
motor. It is a method of changing the horizontal position and height of the microphone
suspended at the common point arbitrarily. In this method, when the position of the microphone
is changed, the angle of the horizontal surface of the microphone slightly changes depending on
the length of the cable, and even if the height of the microphone changes in the vertical surface,
the angle of the horizontal surface of the microphone does not change. There is a drawback that
the relative angle with the surface changes greatly depending on the height. For this reason, the
microphones used for the hanging microphones are forced to use microphones with relatively
low directivity, and there has been a problem in effectively collecting only the target voice.
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[0003]
SUMMARY OF THE INVENTION To solve the problem that the relative angle from the sound
source on the stage changes when the horizontal position and the height of the microphone are
changed by the suspension microphone device, it is possible to obtain a better acoustic effect. It
is a task. This task has been strongly desired from broadcast stations with excellent sound effects
such as NHK.
[0004]
[Function] A horizontally rotating support is attached to the lower part of the microphone
attachment suspended by the suspension device, and a microphone mount having a rotation axis
rotating in the vertical direction is attached to the support. By mounting the motor on each
rotation shaft and rotating the motor, it can be adjusted at any angle with respect to the
horizontal and vertical directions. Therefore, the rotation angle of the motor can be changed by
remote control of the rotation angle of the motor using control signals such as radio waves and
light. In this method, it is possible to correct the change in the relative angle between the
microphone and the sound source, which changes due to the movement of the suspended
microphone. Therefore, it becomes possible to direct the microphone to a desired direction
regardless of the position of the microphone, and even if a directional microphone is used, sound
can be collected with excellent sound effects.
[0005]
DESCRIPTION OF THE PREFERRED EMBODIMENT As described above in the item of operation, a
horizontally rotating support is attached to the lower part of the microphone attachment
suspended by the suspending device, and the lower part of the support is perpendicular to the
stage surface. Attach the microphone mount with the rotation axis that rotates in the direction. A
motor is attached to each rotary shaft, and when the motor is rotated, it can be adjusted at any
angle with respect to the horizontal direction and the vertical direction. When the motor is
remotely controlled by light or radio signals, operability is remarkably improved. It is convenient
to incorporate an antenna and a light receiving portion for receiving radio waves and light in a
hanging object, and in the case of light, attaching a plurality of light receiving portions can
prevent the light receiving capability from being lowered due to the position of the microphone.
Instead of a microphone, it is also possible to incorporate a small television camera, and it
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becomes possible to shoot from an angle not obtained conventionally. Furthermore, in
combination with the suspension microphone device that automatically calculates the cable
length by the calculation already filed, the horizontal angle and vertical angle of the microphone
are also determined by calculation, and the microphone is moved by the method of controlling
the motor for adjusting the angle. However, it is also possible to always point to the sound
source, or when the sound source is a person, it is possible to detect infrared rays emitted by the
person and adjust the angle of the microphone or camera with this signal to automatically track
the angle to the sound source. .
[0006]
According to the present invention, the microphone can be directed to the sound source at an
optimum angle regardless of the position of the microphone, and sound can be collected with an
extremely excellent acoustic effect. In addition, it is also possible to suspend a small television
camera instead of the microphone, and in this case, it is possible to obtain an excellent video
effect which has not been achieved in the past. The effects of the present invention will be
reported on June 20, 1993, at the Broadcast Technology Briefing Session at the NHK
Broadcasting Training Center.
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