CPG1-17N Outdoor Warning Systems Guide

CPG1-17N Outdoor Warning Systems Guide

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FEMA CPG1-17N Outdoor Warning Systems Guide has been developed to aid public officials in determining the requirements for outdoor warning systems.

  • The guide covers, in a simplified form, the principles of sound, outdoor warning systems and devices, propagation and detection of sound out of doors, avoiding hazardous noise exposures, and warning system planning , testing, and use.
  • The guide is adapted from Report No. 4100, Bolt Beranek and Newman Incorporated, produced under Contract No. DCPA-Ol-78-C-0329, Work Unit No. 2234E. Report No. 4100 is based upon a survey of the current literature on the subject, and upon discussions with Civil Preparedness personnel and vendors. No experimental work
    has been performed.
  • The guide is a replacement for Federal Guide , Part E. Chapter 1, Appendix 3, “Principles of Sound and Their Application to Outdoor Warning Systems,” and Part E, Chapter 1, Appendix 4, Annex 1, “General Instructions for Determining Warning Coverage,” both published in December 1966.

The Texas Jarrett Tornado really changed thinking about outdoor warning sirens, which is why I added it to this site.

Audible outdoor warning systems (sirens, air horns, etc.) are an essential component of the Civil Defense Warning System (CDWS) established by the Federal Government to advise government agencies and the public of impending enemy attack or other disaster. Following the detection of an attack or other hazard. information is disseminated over the Federal Emergency Management Agency (FEMA) dedicated communication network — The National Warning System (NAWAS) – – to more than 2,000 locations throughout the United States. From these locations, the public can be informed of a potential hazard through the Emergency Broadcast System (EBS) , TV stations. the news media, and other means.
Outdoor warning systems can advise people that a hazard exists and that they should determine the nature of the hazard by listening to the radio, etc. For more information on other aspects of the CDWS, see CPG 1-14, “Civil Preparedness, Principles of Warning,” June 30. 1977

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