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JPS4819248

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DESCRIPTION JPS4819248
■ Attenuator for condenser microphone ■ Japanese Patent Application No. 45-36197 [phase]
Application No. 45 (1970) April 28 Priority claim [phase] 'April 30, 1969 ... Oki Storia country ■
A4212 / 69 @ invention Hernhard PingGartner Austria 1235 Vienna Moerberg House 53 Conrad
Bolf 0 Applicants Aker Gee Aksitstsier Land Kinoguerete Austria 1150 Vienna 15 Nobi Regasse
50 [fa] attorney Nobuyuki Sugimura two people outside
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional view showing a
cutaway portion of a preamplifier portion of a condenser microphone, FIG. 2 is a cross-sectional
view showing an example of an attenuator according to the present invention, and FIG. FIG. 2 is a
side view of a microphone capsule or head.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an attenuator for
a condenser microphone comprising a microphone capsule and a preamplifier which can be
unitary by being releasably connected to each other by electrical and mechanical connection
members. It is known that the use of condenser microphones of this type is already very popular
because of the high transmission quality of condenser microphones. These condenser
microphones, in particular, record music such as bee [111 111] and pop music, which has a
significant change in dynamic sound range and often sends explosions to pre-amplifiers and / or
post-stage amplifiers. Is also used. Such explosions occur, in particular, for example when playing
a single instrument (for example a trumpet) directly in front of the microphone in a conventional
manner. In order to eliminate such drawbacks, conventionally, the capsule of the condenser
microphone is rigidly connected to the forward amplifier and this is provided with a switch that
can be manipulated externally, whereby the attenuator can be switched on or off to the desired
circuit It was like that. However, in such a configuration, it is not desirable to provide the noise
source switch at the output terminal with very high ohmic resistance of the condenser
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microphone, or in fact at the input terminal of the preamplifier, and at a considerable distance
from the microphone There is a drawback that some sound engineers can not tell if the
attenuator is connected to the circuit. Further, in such a configuration, an unauthorized person
may inadvertently change the position of the switch. It is an object of the present invention to
provide a condenser microphone attenuator of the kind set forth which is suitably arranged to
eliminate the above mentioned drawbacks. SUMMARY OF THE INVENTION The present
invention provides an attenuator for a condenser microphone comprising a microphone capsule
and a preamplifier which can be releasably connected to each other by electrical and mechanical
connection members, and the attenuator is provided with an attenuation element. Are mounted
in the housing comprising electrical and mechanical couplings cooperating with the couplings on
the microphone capsule and the preamplifier, and by means of such couplings the attenuator is
removable between the microphone capsule and the amplifier In the form of a single-piece unit.
The attenuation element mounted in the attenuator housing can be a simple capacitor, which
shunts the microphone capacitor when combining the attenuators into a single body to provide
frequency-independent attenuation. Arrange as you want.
In order to obtain a special frequency response characteristic [111111] EndPage: 1, the
attenuation circuit is arranged in the form of RC circuit, this is connected to the electrical path,
and the microphone capsule is fronted when connecting the attenuator to a single body. It can
also be connected to a static amplifier, for example to play high notes and / or low notes. Attach
the signal indicator mark on the outer wall of the attenuator shell, make it project from the
surface of the preamplifier capsule and the surface of the microphone capsule, and display
clearly for clear viewing from a considerable distance from the remote control room It is
advantageous to have the acoustician at a glance see the connection of the attenuators. Where
several attenuators with different attenuating elements are used, different signal indicator marks
may be used to substantially separate the types of attenuation (e.g. varying with frequency or
attenuation independent of frequency) It can also be made readable at The simplest method of
the above-mentioned display method is to paint a paint which can be seen from a distance on the
outer surface of the attenuator to form a mark, or to use a colored plastic sheath. The outer
jacket surface of the attenuator may be treated directly, in particular by electrochemical means
(e.g. silver plating, gold plating or anodizing) or may be provided with flat plates of suitable
dimensions. It is an object of the present invention to provide a condenser microphone
attenuator of the kind set forth which is suitably arranged to eliminate the above mentioned
drawbacks. SUMMARY OF THE INVENTION The present invention provides an attenuator for a
condenser microphone comprising a microphone capsule and a preamplifier which can be
releasably connected to each other by electrical and mechanical connection members, and the
attenuator is provided with an attenuation element. Are mounted in the housing comprising
electrical and mechanical couplings cooperating with the couplings on the microphone capsule
and the preamplifier, and by means of such couplings the attenuator is removable between the
microphone capsule and the amplifier It is characterized in that it is configured to be connected
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to one another to form a single body. . The attenuation element mounted in the attenuator
housing can be a simple capacitor, which separates the microphone capacitors when combining
the attenuators into a single body to provide frequency-independent attenuation. Arrange as you
go. In order to obtain special frequency response characteristics, the attenuation circuit is
arranged in the form of an RC circuit, this is connected to the electrical path, and the microphone
capsule is connected to the preamplifier when connecting the attenuator to a single body
[111111 ] Can also be. Attach the signal indicator mark on the outer wall of the attenuator shell,
make it project from the surface of the preamplifier capsule and the surface of the microphone
capsule, and make it clearly displayed clearly from a great distance from the remote control room
It is advantageous to have the acoustician at a glance see the connection of the attenuators.
Where several attenuators with different attenuating elements are used, different signal indicator
marks may be used to substantially separate the types of attenuation (e.g. varying with frequency
or attenuation independent of frequency) It can also be made readable at The simplest method of
the above-mentioned display method is a method of applying a paint which can be seen from a
distance on the outer surface of the attenuator to form a mer (or using a colored plastic sheath).
The mantle surface of the attenuator is in particular electrochemical-chemical (eg silver plated). It
can also be processed directly by gold plating or anodizing or provided with flat plates of
appropriate dimensions. The invention will be described with reference to the drawings. If no
damping action is desired or required, the preamplifier 1 and the microphone capsule 2 are
directly mechanically connected by means of screw or plug connections 7 and 8 into a single
body and these are preamp 1 And the electrical plug pin 10 of the microphone capsule 2 can be
electrically connected. However, if it is necessary to provide an attenuator in the microphone, the
microphone capsule 2 and the preamplifier 1 are not directly connected, but are appropriately
separated as shown in the drawing, and the attenuator 3 is interposed therebetween. The jacket
portion 8 ′ of the attenuator 3 is engaged with the connecting member 7 of the preamplifier 1
and the jacket portion 7 ′ is engaged with the connecting member 8 of the microphone capsule
2. Thus, the preamplifier 1, the attenuator 3 and the microphone head 2 are connected to one
another and are again configured as a single unit. An electrical plug pin 5 which cooperates with
the socket 9 is provided on the side to which the amplifier 1 of the attenuator 3, which is an
intermediate element, is engaged, and an electrical socket 9 'for the receiver 10 of the
microphone capsule 2 is provided on the side to which the microphone capsule 2 is engaged.
Provide If the attenuator that needs to be connected in parallel to the condenser microphone is
simply a condenser, then it may be pin 5 and socket 91 91.11 J-. EndPage: 2 On the other hand,
when it is necessary to insert an RC circuit, the electrical connection between the socket 9 'and
the pin 5 is interrupted by the intermediate insulating element 11. The RC circuit can, for
example, be configured with a printed circuit on a disk-shaped flat plate 6, which is provided
removably within the attenuator jacket.
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