The most common noise heard by owners of this car comes from the the water pump. (yourmechanic.com)
The second and third nights the researchers relentlessly bombarded each snoozing participant with recordings of common noises such as toilets flushing, phones ringing and people talking, starting each noise at a low volume and repeating it more and more loudly until the subject was aroused from sleep. (scientificamerican.com)
For example, a dog that is afraid of thunderstorms can grow to be scared of common noises such as rain or the clanking of pots and pans in the kitchen. (southkendall.com)