Accession Number:

ADA071665

Title:

Outdoor Warning Systems Guide

Descriptive Note:

Final rept.

Corporate Author:

BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA

Personal Author(s):

• Keast, David N.

Report Date:

1979-06-01

Pagination or Media Count:

77.0

Abstract:

A practical guide has been developed to aid public officials in determining the requirements for outdoor warning systems. The guide is a replacement for DCPA Federal Guide, Part E, Chapter 1, Appendix 3, Principles of Sound and Their Application to Outdoor Warning Systems, first issued in December 1966. The new guide is based upon a survey of the current literature, and upon discussions with Civil Preparedness personnel and vendors. No experimental work has been performed. The guide, included as Sec. 3 of this report, 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. Technical data in support of the Guide are given in Sec. 4 of this report, and conclusions and recommendations based upon the study are provided in Sec. 5.

Descriptors:

• *CIVIL DEFENSE
• *WARNING SYSTEMS
• *AUDITORY SIGNALS
• TEST AND EVALUATION
• HAZARDS
• ACOUSTIC ABSORPTION
• LOUDSPEAKERS
• SOUND GENERATORS
• ACOUSTIC HORNS
• NOISE(SOUND)
• OUTDOOR
• RANGE(DISTANCE)
• SOUND TRANSMISSION
• SYSTEMS ENGINEERING

Subject Categories:

• Civil Defense
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE