A fire alarm system warns people when smoke, fire, carbon monoxide or other fire-related emergencies are detected. These alarms may be activated automatically from smoke detectors and heat detectors or may also be activated via manual fire alarm activation devices such as manual call points or pull stations. Alarms can be either motorized bells or wall mountable sounders or horns. They can also be speaker strobes which sound an alarm, followed by a voice evacuation message which warns people inside the building not to use the elevators. Fire alarm sounders can be set to certain frequencies and different tones including low, medium, and high, depending on the country and manufacturer of the device. Most fire alarm systems in Europe sound like a siren with alternating frequencies. Fire alarm electronic devices are known as horns in the United States and Canada and can be either continuous or set to different codes. Fire alarm warning devices can also be set to different volume levels.
Kettering is a large market and industrial town in Northamptonshire, England, 70 miles (113 km) north of London and 15 miles (24 km) northeast of Northampton, west of the River Ise, a tributary of the River Nene. The name means "the place (or territory) of Ketter's people (or kinsfolk)".
At the 2011 census, it had a population of 93,475. The town is twinned with Lahnstein, in Germany and Kettering, Ohio, in the United States. It is part of the South Midlands and, along with other towns in Northamptonshire, has a growing commuter population as it is on the Midland Main Line railway, with East Midlands Railway services direct to London St Pancras International taking about an hour.