The volunteers who participated in the study each lived near a major European airport, including Heathrow, in London. As they slept in their homes at night, they were subjected to noises which varied from a partner snoring to road and airport traffic. Both systolic and diastolic blood pressure increased with the level of noise exposure preceeding the measurement. While this effect was independent of the noise source,  aircraft noise produced the most significant results.

As high blood pressure may be associated with health problems, including cardiovascular disease, living in an environment where you are subjected to loud night time noise from either inside or outside the home may therefore be a health hazard. 

Reference

Haralabidis, A., Dimakopoulou, K., Taglianti, F., Giampaolo, M., Borgini, A., Dudley, M., Pershagen, G., Bluhm, G., Houthuijs, D., Babisch, W., Velonakis, M., Katsouyanni, K. and Jarup, L.  2008  Acute Effects of night-time noise exposure on blood pressure in populations living near airports   Online, available at : http://eurheartj.oxfordjournals.org