![](https://s3images.coroflot.com/user_files/individual_files/290323_n3ujbjq3md_qgdn4hhmyvnlur.jpg)
The device was developed into a prototype for validating its main functions, as well as evaluating some material selection options.
![](https://s3images.coroflot.com/user_files/individual_files/290323_kfkqkmn0ssk9vrp8xvg8xkjiu.jpg)
The prototype was tested in the required scenario, inside a helmet.
![](https://s3images.coroflot.com/user_files/individual_files/290323_olpd8tftei9ptmtmi8otkznmh.jpg)
A single part was developed in different material grades for the prototype, to evaluate which material would work best with our design specification.
![](https://s3images.coroflot.com/user_files/individual_files/290323_vb9ox6ahzrfmwicplvqyyv6xg.jpg)
Modifications were made to the prototype as necessary to optimize the device. These modifications were fed back into the revisions of the engineering CAD models.
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