I read a study a few years ago that even when we sleep, noise raises our blood pressure. They connected to a heart/blood pressure machine people who live near an airport: Some of them did not mind at all/said they did not hear the noise of planes taking off and landing. And some did. The results on blood pressure and accelerated heart beats were the same for the 2 groups, whether they cared/said they heard the noise or not: Blood pressure went up during the noise and back down to normal after the noise.