Introduction: Passive Amplifier

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prepare a4 paper or other usable size (used or new)

Step 1: Prepare the Paper

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prepare a4 paper in the corner of the table

prepare hp or smartphone

Step 2: Paper Overlap

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paper overlap with hp or smartphone

play the music

Step 3: Create a Cone

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pull the edge of the paper and tuck it under the hp so that the paper becomes a piece

Step 4: Finished ...

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enjoy the sound

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Bio: (love to share) some projects simply translate or modification of an existing project
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