SFO eliminated 90+ minutes of daily PA noise in its International Terminal by restricting announcements to the relevant gate area, cutting paging 40% since 2020.
Key Takeaways
Gate-scoped PA: departure calls now play only at the originating gate and immediate surroundings, not across the full terminal.
A 2020 airline partnership cut overall paging 40%; SFO’s International Terminal now runs 90+ fewer announcement-minutes per day.
SFO is the first U.S. quiet airport; Amsterdam Schiphol has run a similar silent initiative since 2011, followed by Singapore Changi and Zurich.
Accessibility tradeoff: noise reduction benefits neurodivergent and sensory-sensitive travelers but may remove essential audible cues for visually impaired passengers.
Next phase: SFO is now targeting mechanical noise from escalators and moving walkways.
Hacker News Comment Review
Commenters converge on a signal-to-noise argument: when nearly all announcements are irrelevant, passengers filter everything out, making targeted PA more effective for the few who actually need it.
Thread skews humorous – an overnight Phoenix walkway warning looping until dawn, an Airplane! white-zone callback – with limited technical debate beyond the filtering point.
Notable Comments
@Patrick_Devine: extends the quiet-airport model to in-flight boarding scripts; frequent fliers have heard the overhead bin speech “hundreds, if not thousands of times.”
