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JP2004187251

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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2004187251
The present invention is a waterproof method of an electret condenser microphone, the
conventional method is not completely waterproof, many of the causes of defects are in
insufficient waterproofness, and the causes of defects are eliminated by making the waterproof
completely. In order to solve the problem, it is an object to completely waterproof by combining
a synthetic resin film and a stretchable synthetic resin. [Selected figure] Figure 1
Waterproof of electret condenser microphone
TECHNICAL FIELD The present invention relates to the technical field belonging to the
waterproofing of electret condenser microphones. [0002] As the prior art of the present
invention, the voice entrance of electret condenser microphones There is a method of
waterproofing by putting a waterproof material such as waterproof cloth or waterproof Japanese
paper in front of it, but putting a breathable material, but when water pressure is applied, the
water is electret due to lack of waterproofness. From the voice entrance of the condenser
microphone, it penetrates inside, which causes failure. Since the present invention is not
completely waterproof in the conventional method, when it is used outside when it is raining,
there are a number of causes for defects due to the lack of waterproofness. The problem is to
solve this problem because there is no cause for defects due to complete waterproofing due to
lack of waterproofing. SUMMARY OF THE INVENTION In order to make the electret condenser
microphone completely waterproof, the present invention uses a synthetic resin film and
provides an air chamber instead of directly attaching it to the voice inlet of the electret
microphone. Since good performance was obtained, it is a means of solution. BEST MODE FOR
CARRYING OUT THE INVENTION As an embodiment for making the electret microphone
completely waterproof, the electret condenser microphone is covered with a synthetic resin film,
and the outside is further covered with a stretchable synthetic resin to make the waterproof
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completely. However, when the voice inlet of the rectolet condenser microphone is in contact
with it, the performance is degraded. By providing an air chamber there, the problem can be
solved. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment will be
described below with reference to the attached drawings. By arranging as shown in FIG. 1 to
secure the outer shape of the electret condenser microphone with one stretchable synthetic resin
as shown in FIG. Become to become. The space 2 in FIG. 1 is a space for preventing direct contact
with a case or the like when used, and is a space for protecting the synthetic resin and
preventing deterioration of sound quality and volume. By using a synthetic resin film having a
thickness of several microns among the three synthetic resin films of FIG. 1, good results in both
sound quality and volume were obtained. The four air chambers of FIG. 1 are characterized by
the present invention. By providing the air chambers, good results of equal to or more than the
conventional waterproof method, sound quality and volume are obtained. [0010] In the 5 voice
entrance of FIG. 1, if water enters from here, it is a cause of the defect. It is an object of the
present invention to cover the 5 voice entrance with a synthetic resin film, which is the object of
the present invention. It was possible to make it completely waterproof.
The 6 electret condenser microphone shown in FIG. 1 is a microphone generally used at present,
but there is a weak point in water, so there are various waterproofing methods but there is no
perfect thing. Therefore, by covering the six electret condenser microphones with a water-proof,
synthetic resin film, it was possible to make it completely waterproof which is the object of the
present invention. It is a lead-out line of the output of the six electret condenser microphone,
which is a lead-out line 7 of FIG. BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1] Partial crosssectional front view [FIG. 2] Bottom view [FIG. 3] Partial cross-sectional top view [Description of
symbols] 1 stretchable synthetic resin 2 gap 3 synthetic resin film 4 air chamber 5 voice inlet 6
electret condenser microphone 7 lead wire
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