Giant speaker

        




Cinema plays a huge role in our lives, it can even encourage a person on an incredible invention. That student engineers at the University of Wisconsin Dan Luba (Dan Ludois) and Kyle Hanson (Kyle Hanson), with the support of his classmates, apparently impressed by the movie Back to the future, decided to experience the same feelings as Marty McFly, and make a giant speaker cone diameter is 6 feet (182 cm), and it took a budget of only $600.

This incredible design, which its creators called "Giant horn" (The Giant Speaker), was made for exhibition Engineering Expo conducted by the University of Washington.









It is clear that with this budget, the best materials were available to them, so, for example, the diffuser is made of polycarbonate. The coil on the speaker is not made of carbon fiber, preferably, made of fiberglass. It consists of three layers of wire 18 diameter, wound on a form attached for support to Steklovolokno drive.

For this dynamics are used twenty-four neodymium magnets, and the system power source is a 20-kilowatt inverter with a pulse width modulator. Elements of this design was partly made by hand, partly with the use of technology, and then collected and placed in a huge box.

However, of enormous dimensions, proved to have its drawbacks: due to gigantism and the great mass of the cone speaker to reproduce the exceptionally low frequency sound waves from 5 Hz to 50 Hz.





     

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