To establish the relationship between community reaction and exposure to aircraft noise in Australia. Variables Ratings of annoyance, dissatisfaction and fear, as well as information on activity disturbance, etc. were collected to derive an overall measure of subjective annoyance. Noise measurements around the five airports studied were used to estimate noise exposure at each survey dwelling in terms of a number of different indices. Analysis was focussed on determining which noise exposure index provides the best predictor of community reaction. Other determinants of reaction were also investigated including demographic variables (age, sex, occupation, education) and psycho-social variables (noise sensitivity, attitudes towards aviation, fear of aircraft crashing).