Muse is a wearable brain sensing headband. The device measures brain activity via 4 electroencephalography (EEG) sensors. An accompanying mobile app converts the EEG signal into audio feedback that is fed to the user via headphones. Muse is manufactured by InteraXon, a company based in Toronto, Ontario, Canada that was founded in 2007 by Ariel Garten, Trevor Coleman, Chris Aimone, and Steve Mann originally at 330 Dundas Street West (Steve Mann's lab), in Toronto, Ontario, Canada. Development of the Muse product began in 2003, and after several rounds of fundraising, was released to the public in May 2014. In 2018, the company launched Muse 2, which also measures heart rate, breath, and body movement.