There is one possible action by Santa Barbara Airport that could substantially reduce noise for many residents that perhaps has not been considered.
The airport could build a new runway, angled from the South East corner of the airport to the North West corner.
The approach flight path from the south east would be entirely over the ocean, minimizing noise impact, while the flight path to the north west would be over an industrial area, over the Goleta High School, and over Glen Annie Golf Couse, with reduced noise impact compared with the current east-west flight path.