alshon and seek take on you this kind of noise doesn't carry information so after a while our brains infer that they don't need to do anything until in the noise out all register it subliminally. when feud even so that's why it feels relaxing. by listening it's not real silence there is something there but it's not threatening is take it's not telling us anything so we can just relax your attitude as you in synch but to. weights might still primal anxiety and let us sleep easy but one of the ocean is far away. is highway noise and effective substitute. is one for when traffic noise isn't all that different when the vehicles are just passing by at a constant speed and not starting and stopping on the stuff once again the sound is continuous over time and have a constant volume because the cars are driving at around the same speed in the fog so i get on with a farm the think is when the cards here are. so in a sense listening to a highway should be a good lot of ice except our brains link the sounds to the cause of them and the associations are anything but mellow traffic speed concent