Podcast:99% Invisible Published On: Tue Jul 26 2016 Description: The US military buys a lot of foam ear plugs. Visit any base and you’ll find them under the bleachers at the firing range, in the bottoms of washing machines. They are cheap and effective at making noise less … noisy. … Continue reading → Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to ad-free new episodes and get exclusive access to bonus content.