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Mechanical sirens driven by an electric motor are often called "electromechanical". One example is the Q2B siren sold by Federal Signal Corporation . Because of its high current draw (100 amps when power is applied) [ citation needed ] its application is normally limited to fire apparatus , though it has seen increasing use on type IV ...
This Q2B or "Q-siren" is mounted on a Pierce Platform Aerial Fire Truck owned by the City of Bellingham, WA. The Q2B siren ("Q-siren") [1] is an electromechanical siren that is produced by the Federal Signal Corporation and is most recognizable for its sound, which is trademarked, and the look of the siren.
Electro-Mechanical 2, 5, 7.5, 10 8, 9, 9/12, 10/12 1968–1994 Omni Directional 102–115 dB at 100 ft. Series of small vertical sirens, comparable to Federal Signal Corporation's vertical sirens. Sentry 95 Electro-Mechanical 1 5/6 Sometime around the late 60s/early 70s. Omni Directional 95 dB at 100 ft. Very rare siren.
The Federal Signal 3T22 was originally designed as the 2T22 in 1952 or 1954. The 2T22 has the same number of ports and cones. It can produce two main signals (it can produce more but the other signals are rarely used), hence the name "2T22" (the 2 at front representing the 2 choppers, and the 22 representing the amount of horns).
The most common siren type is the electromechanical KM Europ 8 port single tone siren. These sirens have a very characteristic sound: a very fast wind-up and a lower pitch than most sirens (the pitch is comparable to a STL-10 on a lower frequency resulting on a lower pitch).
European Siren for fire detection system. A fire alarm notification appliance is an active fire protection component of a fire alarm system.A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.
The CLM Model 927XXDP siren (rotational CLM) is a 10/12 port rotating electromechanical siren, with a distinctive design featuring two unique horns. The decibel rating of the model is ~130 decibels. These sirens use Lincoln Electric 5 horsepower induction motors. This model of CLM is the most well-known and recognizable warning siren made by CLM.
In France, the population warning is made via air raid siren. This network is called the "Réseau national d'alerte" (RNA). The system is inherited from the air-raid siren network (défense passive) developed before World War II. It consists of about 4,500 electronic or electromechanical sirens placed all over France.
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