In the 1920’s, Hugo Gernsback invented The Isolator which was a helmet aimed to improve concentration by blocking out noise and narrowing the users field of view. – WTF Fun Facts
Source: https://www.thevintagenews.com/2015/12/22/the-isolator-an-invention-from-1925-designed-to-improve-work-productivity/
WTF Fun Fact – The Isolator
