This report describes the results of several on-going analyses: (1) Analysis of ambient data measured under high-wind conditions; (2) Quantification of the differences between in situ observer logging versus offline review of digital recordings; and (3) Computation of natural ambient and existing ambient without air tours.
This report describes the results of several on-going analyses: (1) Analysis of ambient data measured under high-wind conditions; (2) Quantification o...
Lisandra Garay-Vega Aaron Hastings John K. Pollard
The National Highway Traffic Safety Administration recognizes that quieter cars such as hybrid-electric vehicles in low-speed operation using their electric motors, may introduce a safety issue for pedestrians who are blind. This study documents the overall sound levels and general spectral content for a selection of hybrid-electric and internal combustion vehicles in different operating conditions, evaluates vehicle detectability for two ambient sound levels, and considers countermeasure concepts that are categorized as vehicle-based, infrastructure-based, and systems requiring...
The National Highway Traffic Safety Administration recognizes that quieter cars such as hybrid-electric vehicles in low-speed operation using their el...
