The app’s functionality is very straightforward. It plays a low 100Hz sine wave tone through a pair of connected headphones for 60 seconds. This is supposed to stimulate the vestibular system – the parts of the inner ear that are responsible for orientation and maintaining balance. The app allows the duration of the tone to be adjusted between 40 to 120 seconds, but a full minute of listening is supposed to provide relief from motion sickeness symp …
