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  2. Q2B - Wikipedia

    en.wikipedia.org/wiki/Q2B

    When vehicle electrical systems advanced, siren manufacturers began producing sirens to operate with the new twelve volt systems. Beginning in the late 1960s, the electronic siren began to replace the mechanical siren. It provided several tones (wail and yelp) and a PA option.

  3. American Signal Corporation - Wikipedia

    en.wikipedia.org/wiki/American_Signal_Corporation

    Hörmann GmbH began selling their ECN/ECI sirens through ASC's market. Over the decade, the prominent advancements the company made in its sirens' designs included battery operation, high powered Voice/Sirens, and indoor alerting systems. Similarly, designed sirens were still manufactured, but under new names, such as the Tempest series.

  4. List of sirens built by Alerting Communicators of America

    en.wikipedia.org/wiki/List_of_sirens_built_by...

    Electronic none none 1991–1994 Rotating 126 dB at 100 feet This was the replacement for the AL-6000R. It only has 4 horns rather than 8. These came with 16 100 watt drivers, 4 on each horn. Quadren Electronic none none 1992–1994 Omni/uni Directional dB rating depends on model. One of the last electronic sirens made by ACA before their ...

  5. Siren (alarm) - Wikipedia

    en.wikipedia.org/wiki/Siren_(alarm)

    A siren is a loud noise-making device. There are two general types: mechanical and electronic. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines.

  6. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    The remaining sirens are a mix of older motor driven models (usually from World War II), such as the Carter siren manufactured by Carter's of Nelson or the "syren" manufactured by Gent's of Leicester, and Cold War like Castle Castings and Secomak (now Klaxon Signal Co.) and newer electronic sirens like Hormann ECN, Whelen, Federal Signal ...

  7. Early warning system - Wikipedia

    en.wikipedia.org/wiki/Early_warning_system

    A HSS Engineering TWS 295 electronic sirens warning Civil Defense siren. An early warning system is a warning system that can be implemented as a chain of information communication systems and comprises sensors, event detection and decision subsystems for early identification of hazards. They work together to forecast and signal disturbances ...

  8. Federal Signal Corporation - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_Corporation

    By this time, it made outdoor warning sirens, police sirens, fire alarms, and outdoor lighting. By 1961, Federal Sign and Signal had gone public, trading on the NASDAQ market. This was when new products started being manufactured and sold, such as the Federal Signal Model 2. In 1976, the company became Federal Signal Corporation.

  9. National Emergency Alarm Repeater - Wikipedia

    en.wikipedia.org/wiki/National_Emergency_Alarm...

    The NEAR warning device. The National Emergency Alarm Repeater (NEAR) was a civilian emergency warning device in the United States. It was a 2–3" (5–7.5 cm) square box designed to plug into a standard power outlet to receive a special signal sent over the electric power transmission lines.

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