Two aspects of subjective response (dissatisfaction) to road traffic noise were investigated: 1) The hypothesis was tested, that a decrease or increase in noise exposure will result in a greater change in dissatisfaction than predicted from response to steady-state noise exposure. 2) Individual differences in response were investigated, using a measure of dissatisfaction which is more reliable than ones previously used. Variables Level of road traffic noise (18hr L10 dB(A)), dissatisfaction with road traffic noise, sensitivity to noise, satisfaction with home area. Interference due to noise, loudness ratings, behavioural effects of noise, health and noise, attitudes to roads and traffic. The Eysenck Personality Questionnaire and the Rotter scale (for the assessment of internal vs external attribution of reinforcement) were also administered to some respondents.