However, it must be noted that response to the Hush smart earplugs have been nothing short of overwhelming, so much so that it has received funding to the tune of close to five times the originally intended amount. How does the Hush smart earplugs work? Well, this pair of noise-cancelling ear plugs will hook up to your smartphone in order to deliver the best sleep of your life – or at least that is what it claims. The Hush smart earplugs will sit directly in your ear canals, where they were made using sound eliminating foam in order to drown out everyday disturbances. When working in tandem with the Hush app on your iOS or Android device, you can select from binaural beats or sounds that you would like to hear in order to rest in comfort, while functioning as a personal alarm as and when required.