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(Left) Concept of the system (Right) Drawing of the MEMS generator (Via Purdue University)


A new medical pressure sensitive implant, microelectromechanical system (MEMS), is out that uses sound as a power source. This MEMS device is a sensor that monitors the pressure of the urinary ladder and in the sack of blood vessel damages by an aneurism. Purdue University researches invented the MEMS to one day treat people with aneurism or incontinence due to paralysis patients.


The MEMS device uses a vibrating cantilever that is connected to the bottom of the heart by a thin. The cantilever vibrates when music is within the range of frequencies of 200-500 hertz. When the cantilever vibrates it generates electricity, and that charge is stored in a small onboard supercapacitor. When the frequency falls out of the useful range, the cantilever stops vibrating and will automatically send the electrical charge to the sensor. At the same time, the system will take the pressure readings and transmits the data wirelessly.



MEMS generator (via Purdue University)


The cantilever beam is a ceramic based lead zirconate titante material, a piezoelectric (PZT)element. The sensor is about two centimeters long. Researcher even tested the device in a water-filled balloon to see if still worked, and the test was a success. To get this device powered you can use batteries or an external transmitter.


The four genres tested with the MEMS were rap, blues, jazz, and rock. Among the four genres of music tested, rap rise above all when being the most effective. "Rap is the best because it contains a lot of low frequency sound, notably the bass," Purdue professor Babak Ziaie said. In rap, the vulgar words and the deep bass are put together for the listener to understand the true power of the message, which does not give the rap genre the best reputation. Soon, doctors using the device will understand the true power of Tupac songs.