art
Sine Wave A 440 Hz Concert Pitch for Ten Hours
Stop your brain from overthinking. You don't need an app. Ten hour Sine wave with no overtones which is called pure as it is only the fundamental frequency.
Youtube
Swimming Pool by Leandro Erlich is an art installation conceived in 1999, Swimming Pool allows visitors to look down into a seemingly full pool of water with fully clothed visitors walking around the bottom of the pool. From below, the blurry vision of looking up when underwater is recreated using a thin piece of glass with water running over top of it. Complete with a climbing ladder, swimming pool is a fun and interactive installation that creates the illusion of being underwater whilst remaining completely dry.