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EOWS (Electronic Outdoor Warning Siren) is a series of electronic outdoor warning sirens by Federal Signal Corporation which began production in the early 1980s. Six types of sirens were produced. ==Siren types/numbers== * EOWS 115 – omnidirectional siren on a hexagonal base, rectangular horns, first of two EOWS omnidirectional sirens. * EOWS 408 – focused rotating siren, 4 horns and 8 drivers. * EOWS 612 – focused rotating siren, 6 horns and 12 drivers. * EOWS 816 – focused rotating siren, 8 horns and 16 drivers (largest/loudest rotating electronic siren.) * EOWS 1212 – omnidirectional siren, an improved version of the 115, also on a hexagonal base but with the type of inversion horns/drivers used on the 408-through-812 rotating variants. There was also a mobile mounted version, at one time, called the M *12. Most of the EOWS line was discontinued in the mid- to late 1990s and newer designs, like the Modulator and DSA, have replaced it. The EOWS is not in standard production, as of 2008. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「EOWS」の詳細全文を読む スポンサード リンク
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