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JPS5531331

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DESCRIPTION JPS5531331
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross sectional view of an embodiment of the
present invention, and FIG. 2 is a cross sectional view showing a part of FIG. 1 · · · · · · · · · · · · · · · · ·
· · · · · · · · Microphones · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Spring · · · · · ......... Unit case, 8
... ... Damper material, 12 ... ... Ceramic element.
DETAILED DESCRIPTION OF THE INVENTION The invention is based on the output of a
conventional microphone unit with no delay in signal transmission and the delay in signal
transmission (1). The present invention relates to a reverberant microphone that can arbitrarily
mix the output of a delay microphone unit and output it. Conventionally, a reverberation
microphone has been devised and used, in which a spring for signal delay is incorporated in part
of a microphone unit and a voice input is appropriately delayed and output. Such a microphone
can obtain reverberation. However, since the reverberation component in the output signal is
determined by the structure, there is a problem that the reverberation effect can not be
controlled to the optimum state. This invention is made in view of this point. 1 An embodiment of
this invention will be described with reference to FIG. 1. A frame 1 is made of a synthetic resin
material, etc. A case (not shown) It will also be delivered to At the front of the frame 1, a normal
microphone unit 2 (electret microphone) with no delay in signal transmission and a diaphragm 3
forming a part of a delay microphone unit described later are aligned and attached in the same
direction. 2) J)-no. At the rear of the frame l, a circuit board 4 is supported, on which a mixing
circuit is incorporated. The output side of the 71 rophone unit 2 is connected to the mixing
circuit of. A hook 5 is defeated 1 at the central portion of the diaphragm 3 and the tip of a delay
spring 6 is attached to the hook 5. The rear end of the spring 6 is engaged with the front end of
the damper material 8 protruding from the unit case 7 provided on the circuit board 4 via the
hook 9. The damper material 8H1 is formed of a rubber rod-like member having a rectangular
cross section, extends and contracts in the direction connecting the unit case 7 (in which the
microphone unit is incorporated as described later) and the moving plate 3, Has a bending
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characteristic. The shape of the damper member 8 is, for example, a cylindrical member having a
cross section other than a rectangular shape and 3) °° "" is also preferable, and the material is
limited to rubber without Ot 1 synthetic resin material And other flexible materials. Inside the
unit case 7, as shown in FIG. 2, a ceramic element 12 as a power generation element supported
by the base end full support rubber 10 between the circuit boat 4 and the intermediate portion
supported by the damper rubber 11 as shown in FIG. The base end of the above-mentioned darbar material 8 is attached to the tip of this ceramic element 12.
And these 11 form a delay microphone unit. , I3 +-, j The output lead of ceramic body 12 and is
connected to the Miki song circuit. Next, when the sound pressure is applied to the diaphragm
(not shown) and the diaphragm 3 of the microphone unit 2 in the figure, the microbon unit 2
converts the sound pressure into an electric signal as it is. Input to the miking circuit. On the
other hand, the diaphragm 3 is also moved by this sound pressure, but the vibration is
transmitted to the damper member 8 via the delaying spring 6 as the vibration in its longitudinal
direction. As the damper material 8 vibrates, the ceramic element 12 vibrates to generate an
electrical signal, and this electrical signal (delayed signal) is also input to the mixing circuit. The
mixing circuit mixes these two signals to produce a mixed output, which is output as a micro-bon
output. The damper material 8 is selected to have a sufficiently long length in the longitudinal
direction as compared to its cross section. Because of this, the lateral vibration of the spring 6 is
mostly absorbed by the bending of the damper material 8 and eventually only the longitudinal
vibration of the spring 6 is transmitted to the ceramic element 12. Therefore, in the handling of
the microphone, it exerts a force not to transmit to the ceramic element 12 unnecessary vibration
of the spring which is generated by light lateral vibration, impact or the like applied to the
microphone. Although the ceramic element is used as the power generation element in the above
embodiment, another element may be used. (5) Since this device is configured as described
above, the output of an ordinary microphone unit with no delay in signal transmission and the
output of a microphone unit for reverberation with a delay in signal mixing with gold as desired
It can be a signal, and you can get a microphone output that contains optimal reverberation.
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