Jinx wrote: >> ^If it is high pitched then it can be attenuated by a good set >> of ear protection. Preferably a combination of expanding ear >> plugs and some wrap around headgear > > She has tried earplugs + earmuffs, no joy > Hypertension? May be her blood pressure is fooling she. Many people get confused about high-pitched sounds. They came from the hearing system itself and paranoia makes the sound come from the tower. Tell her to try to sleep in a very quiet and far away place, for a few days. (physician-audiometry-therapy) Dennis -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist