This "paper" is actually a thin-film speaker based on piezoelectric technology and weighs about a dime. From the outside, it is thinner, softer and more transparent than previous membrane speakers.
Clip the audio cable on one side of this "paper", then plug the other end of the audio cable into the headphone port of the computer, turn on the audio, and you can hear the sound it makes.
It is different from previous membrane speakers. In order to sound, the previous thin-film speakers needed to vibrate freely after applying a voltage, which means that the thin-film must be designed to be suspended and not attached to any objects to ensure that the vibration is not hindered.
The current new membrane speakers use a suspended microstructure design, on which there are many small bubble-like domes (each about 15 microns high, less than a hair thick), which can vibrate freely, thereby replacing the original overall suspension. with vibration to produce sound. This also allows the membrane speakers to produce high-quality sound no matter what surface they are attached to. Additionally, these small domes are surrounded by spacer layers on the top and bottom of the membrane speaker, protecting it from the mounting surface.
In addition to being able to "sing", this kind of thin-film speaker, if arranged in a large area, can also attenuate the noise by producing sounds with the same amplitude but opposite phases in a noisy environment to achieve active noise reduction.
If you had such a "paper", where would you stick it?
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