1. J. acoust. Soc. Am.;Young;On estimating noisiness of aircraft sounds,1969
2. FAA Report 68-35;Ollerhead;Subjective evaluation of general aviation aircraft noise,1968
3. FAA Report 68-33;Hecker;Comparisons between subjective ratings of aircraft noise and various objective measures,1968
4. Central Office of Information. Report SS 337;McKennell;Aircraft noise annoyance around London (Heathrow) Airport,1963
5. J. Sound Vib.;Griffiths;Subjective response to road traffic noise,1968