After five years, every mouse had died. This occurred despite the fact that right up to the end there was plenty of food, water, and an absence of disease. After the research psychologist reported on his experiment, a couple of significant questions arose. In other words, our values would be lost. Charles Swindoll, Quest For Character , p. 35-36.
Noise affects human behavior.
In one experiment carried out by psychologists, a student leaving a library intentionally dropped an armload of books. Then the experimenters brought out a lawn mower without a muffler and started it near where a student would again intentionally drop the books. It was clear that behavior changed because of the earsplitting sound of the nearby lawn mower. In experiments in Los Angeles, researchers found that children who lived in neighborhoods near the airport could not complete certain tasks undertaken when jets were landing and taking off as easily as children who lived in quiet neighborhoods. Some studies of prison conditions have shown that the high level of noise causes more complaints by prisoners than the food or other prison conditions do.