The characteristics of noise which does not effect task performance is :

Exposure to Information

Any sound that is annoying or irritating, and felt to be unpleasant is said to be noise. From common experience it is known that noise, especially for long periods of time, is uncomfortable, and puts people in an unpleasant mood. Exposure to noise for a long period of time may lead to hearing loss. Apart from that, noise has negative effects on mental activity because it reduces concentration. Many of you might have experienced this when you tried to study for your examination, with the neighbours celebrating a marriage with loud music. Three characteristics of noise have been found to determine its effect on task performance, namely, intensity, predictability, and controllability of noise.