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<br />Cont.: Background Noise <br /> <br />- "It is probably a good thing to have this ability <br />because it allows us to tune out background <br />noises like the humming of a car's motor while <br />we are driving or the regular tick-tock of a <br />clock," said study team member Ellen Covey, <br />a psychology professor at the University of <br />Washington. "But at the same time, these <br />neurons would instantly draw a person's <br />attention if their car's motor suddenly made a <br />strange noise or if their cell phone rang." <br /> <br />(Source: How the Brain Tunes Out Background Noise. LiveScience Staff. posted: 02 December 2005) <br />