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MEMS chips convert the digital sound source into the sound waves again on the other side of the speakers, for example in a telephone.
Figure 1.
But what happens in these chips?
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• The Ventilation hole allows the air compressed in the back chamber to flow out and consequently allowing the membrane to move back
Figure 2.
Little deeper information:
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MEMS, microelectromechanical systems. Microelectromechanical systems (MEMS) (also written as micro-electro-mechanical, MicroElectroMechanical or microelectronic and microelectromechanical systems and the related micromechatronics) is the technology of very small devices. MEMS are made up of components between 1 to 100 micrometres in size. They usually consist of a central unit that processes data (the microprocessor) and several components that interact with the surroundings such as microsensors.
Figure 3.
Cymatics is the study of visible sound co vibration, a subset of modal phenomena. Typically the surface of a plate, diaphragm, or membrane is vibrated, and regions of maximum and minimum displacement are made visible in a thin coating of particles, paste, or liquid. Different patterns emerge in the excitatory medium depending on the geometry of the plate and the driving frequency[2]. And that is the effect that accurse when the sounds waves, shown in figure 1, arrive to the front plate.
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