Everywhere we go, from ground to sky, we are surrounded by noises. Cars, planes, trains and people are just a few examples of what can be heard throughout any city or town. These noises stimulate our ears almost 24 hours a day, and few choices are available to us for avoiding them — one being specialist equipment, such as noise-cancelling headphones. Being aware of the noises around you will increase your comfort and ability to work more efficiently.