07-04-2018, 10:06 PM
(07-04-2018, 02:17 PM)AbundanceCH Wrote: I say sleep using only the ultrasonic subs. Because of the noise of the masked subs you will not sleep as well and will wake up more tired.
That depends. For me for example US has the tendency to make me awake, so almost impossible to sleep to US track.
In theory, theory and practice are the same. In practice, they are not.