J. Steven Newman
Correlations of helicopter noise levels with physical and performance characteristics
Helicopter noise contour development techniques and directivity analysis
Helicopter noise definition report
Helicopter noise exposure curves for use in environmental impact assessment
International Civil Aviation Organization Committee on Environmental Protection
International Civil Aviation Organization helicopter noise measurement repeatability program
Noise levels and data analyses for small prop-diven aircraft
Noise levels and flight profiles of eight helicopters using proposed international certification procedures
The need for airport noise monitoring systems