Memorization of young people under loud pink noise of short duration.

Exposure of students to loud pink noise of short duration in schools with high background noise showed that memorization of the students under loud pink noise is correlated with noise level. For levels up to 91.5 dB(A) the performance of 275 students improved, but for louder noise performance was reduced.

Environmental noise-annoyance in Patras, Greece.

Noise pollution in most European and mainly Greek towns, is a major environmental problem. The annoyance caused by environmental noise is great and the use of a reliable descriptor of noise is important. This paper attempts to evaluate the noise fluctuations at an observation point by introducing a probabilistic model for the system environment-noise.The proposed model considers environmental noise as a stochastic signal neglecting the identity of noise sources as well as all other physical factors of the system. Regression methods were used to fit fluctuating noise levels to a trigonometric series. The use of "power spectrum" linearizes the problem and simplifies the method of regression in searching for the best model. A correcting term of L dn is proposed and the use of the model makes the calculation of the above mentioned term simple.