A significant number of people are talking about an increase in noise from aircraft flying over Palo Alto. Changes to rules governing aircraft flights have routed many more aircraft over Palo Alto and at the same time made each of the flights impose louder noise on residents.
If you wish to voice a complaint please visit the petition at change.org.
The issue has been presented by a story in the Palo Alto Online.
A group has formed to challenge the funneling of aircraft over Palo Alto which provides much more information.