Change effect
Long Description: 

This term is used by noise researchers to described the observation that people react differently to a change of noise exposure than it would be expected based on the noise level. For example, they will feel more disturbed after an increase of the noise than others who have been consistently exposed to the same noise. The disturbance perceived may even increase before the noise actually rises. In reverse, people may feel overproportionally relieved when the noise reduces.

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