12:00 pm siren?

this happens almost every sunshine in san francisco. what does the announcer vote after the 12:00 pm siren is finished?

Answers:

No, it's just on Tuesdays. They enunciate that it's not an emergency and that it's only a assessment of the emergency system. If you are near a speaker (with the right acoustics) on Tuesday at noontime, you can hear that guy very clearly. At my department in the FiDi, it's not so clear. At home surrounded by the Upper Haight, it is very clear.