A design firm in the Ukraine has designed a helmet that is supposed to make you more productive in an open work space by eliminating distractions. This either works or instantly turns you into a famous DJ.
From the product website:
Helmfon is a device in a form of helmet, which thanks to the system of active sound absorption allows to concentrate in open working spaces. Because of the special absorption features, this helmet fully reflects the outside sound waves and thus makes the process of working comfortable, with no outside noise. …Our main idea was to create a tool, which helps fully concentrate on working project, get some personal space and doesn’t allow office noise kill person’s productiveness.
More information
http://hochurayu.com/product_design/helmfon/