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JPS60174391

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DESCRIPTION JPS60174391
[0001]
Brief description of the drawings
[0002]
FIG. 2 is a circuit diagram showing an equivalent circuit of the microphone shown in FIG. 1, and
FIG. 3 is a cross-sectional view showing a structure of a unidirectional dynamic microphone
according to an embodiment of the present invention. FIG. 4 is a cross-sectional view showing the
structure of a conventional nondirectional dynamic microphone, and FIG. 5a is a cross-sectional
view showing the structure of a conventional unidirectional dynamic microphone. 5 is a circuit
diagram showing an equivalent circuit of the microphone of FIG. 5 a. Explanation of symbols, 1 · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Diaphragm
7,... Acoustic phase shift circuit,.
13-05-2019
1
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