All week long we've been playing this sound, and asking you to guess what exactly it is and where exactly in the Bay Area we recorded it.
This auditory guessing game is part of our project, Audiograph, a crowd-sourced collaborative radio project mapping the sonic signature of each of the Bay Area’s nine counties. By using the sounds of voices, nature, industry, and music, Audiograph tells the story of where you live, and the people who live there with you. Every Thursday, we reveal the origins of that week's sound on Crosscurrents, and here in weekly blog posts.
Listen above for the full answer...
JAMES OSBORNE: Battery Chamberlin was one of 20 gun batteries on both sides of the Golden Gate. So this was homeland security in the early 20th century sense.
Congratulations to this week's winner, Barbara Corff! We'll have a new sound for you to guess and another chance to win coming up next Thursday.
In the meantime, is there a sound from your life that should be featured on Audiograph? Call at 415-264-7106 and tell us about the sound of where you live.
Check out our Facebook, Twitter and Soundcloud pages to hear more from Audiograph.