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United States Department of Transportation United States Department of Transportation

Acoustical Warning Devices as Emergency Warning Signals, Phase 2

Document Series
Technical Reports
Author
Federal Railroad Administration
Report Number
DOT/FRA/ORD-21/13
Office
RPD-32
Subject Rolling Stock
Keywords
Emergency Warning Signal, EWS, train horn, trespassers, music masking sounds, reaction time, Acoustic Warning Device, AWD, music, listening, rolling stock

The Federal Railroad Administration (FRA) sponsored a project to demonstrate the effectiveness of an Acoustical Warning Device (AWD) to be used for generating a secondary Emergency Warning Signal (EWS). The focus of this Phase 2 work is to warn trespassers of an approaching train through the development of an EWS that produces a sense of urgency, is noticeable to wearers of headphones, and identifiable as a train. Several EWS sounds were developed and evaluated in surveys to assess the participant’s response of the sense of urgency and detectability. Researchers identified sound characteristics that enhance detectability.

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Last updated: Friday, March 19, 2021