Table B.1, from Federal Agency Review of Selected Airport Noise Analysis Issues, Federal Interagency Committee on Noise (August 1992). Source of that information is attributed to Outdoor Noise and the Metropolitan Environment, M.C. Branch et al., Department of City Planning, City of Los Angeles, 1970. Cited at Howard Beckman. "Noise Sources and Their Effects". Airport Noise Law. Retrieved December 1, 2020.