//distance = (duration / 2) / 29.1; // Speed is ~300m/s,
// so it takes ~29.1 milliseconds for a cm.
distance = (duration / 58.2); // Atmegas are not found of divisions
//distance = (duration / 2) / 29.1; // Speed is ~300m/s,
// so it takes ~29.1 milliseconds for a cm.
distance = (duration / 58.2); // Atmegas are not found of divisions