AUTOMATIC WARNING OF TRACK MAINTENANCE GANGS. TESTS CARRIED OUT IN THE LABORATORY AND IN OPERATING CONDITIONS FOR SELECTING OPTIMUM ACOUSTIC WARNING SIGNALS
This report describes tests carried out in the laboratory and in service conditions concerning the perceptibility of acoustic warning signals in the presence of the severe background noise produced at track worksites. The tests in the laboratory were carried out with several forms of signals, allowing the influence of the following factors to be studied: dissonance, types of signal, frequency spectra and their bandwidth and centre frequency. Arising from the laboratory studies, selected signals were investigated under operating conditions at the threshold of perception. Tests were also made above the threshold of perception using pneumatic signal generators which had been specially manufactured to produce warnings of defined types.
- Restrictions on the use of this document are contained in the explanatory materials.
International Union of RailwaysOffice of Research and Experiments
- Publication Date: 1977-10
- Features: Appendices; Figures; Tables;
- Pagination: 66 p.
- TRT Terms: Acoustic equipment; Acoustic measuring instruments; Acoustics; Audible warning devices; Maintenance of way; Maintenance personnel; Safety; Sound level; Test procedures; Tests
- Uncontrolled Terms: Railroad construction workers
- Old TRIS Terms: Acoustic measurement; Acoustic warning systems; Question a124; Track maintenance machines
- Subject Areas: Railroads; Safety and Human Factors;
- Accession Number: 00053279
- Record Type: Publication
- Source Agency: International Union of Railways
- Report/Paper Numbers: A 124/RP 8
- Files: TRIS
- Created Date: Jul 29 1978 12:00AM