Fire Alarm System
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.
Great Yarmouth, often called Yarmouth, is a seaside resort and minster town in Norfolk, England, straddling the River Yare, some 20 miles (30 km) east of Norwich. A population of 38,693 in the 2011 Census made it Norfolk's third most populous place. Its fishing industry, mainly for herring, fell steeply after the mid-20th century and has all but vanished. North Sea oil from the 1960s brought an oil-rig supply industry that now services offshore natural gas rigs. More recent offshore wind power and other renewable energy have created further support services. Yarmouth has been a seaside resort since 1760 and a gateway from the Norfolk Broads to the North Sea. Tourism was boosted when a railway opened in 1844, which gave visitors easier, cheaper access and triggered some settlement. Wellington Pier opened in 1854 and Britannia Pier in 1858. Through the 20th century, Yarmouth was a booming resort, with a promenade, pubs, trams, fish-and-chip shops and theatres, and the Pleasure Beach, the Sea Life Centre, the Hippodrome Circus and the Time and Tide Museum, and a surviving Victorian seaside Winter Garden in cast iron and glass.