tachyon_1@email.com wrote: however, if your wife calls your name, you'll likely hear it because your brain is trained to recognize it and filters it from the noise. Some people's filters must be broken, they appear to work exactly opposite to your example. :-) Nate -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist