DIY Sound Amplifier For Phone - How To Make Cardboard Sound Box
In this video, I made an audio booster for any phone you have with you.
Things Required -
To make this video, I made a cardboard box and measure styrofoam cups. Now cut out both as shown. Now, paste them with hot glue also.
Now, measure the wideness of the phone and cut out it and the top of the cardboard as well.