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JPS58144988

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DESCRIPTION JPS58144988
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a
characteristic diagram showing an example of sound pressure frequency characteristics in the
embodiment of FIG. DESCRIPTION OF SYMBOLS 1 ... audio | voice output amplifier, 3 ... speaker
system 1, the level controller for 5 ... variable resistor, 7 ... inductor, 9 ... speaker system.
07-05-2019
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