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30 billion plastic bottles are thrown away every year and the most of them end up in landfill. It becomes a major hazard to our environment. The Second Sound aims at giving the waste bottles a second life to be something useful. It provides users a sticker with an instruction on the back. With the instruction, users can assemble a loudspeaker using waste bottles. Without high-technology and even electricity, it can reduce the loss of sound waves, and sounds can be scattered through the holes on the Second Sound.
Huang Yichen, Liu Yi, Ye Peng, Shen Yuebo