This auditory guessing game is part of 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.

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 is Audiograph — the Bay Area’s sonic signature. Each week, we’ll play you a sound recorded somewhere in the Bay Area. Your job? Listen to the sound in the player above, figure out where it was recorded and what it is, then call to let us know.

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 is Audiograph — the Bay Area’s sonic signature. Each week, we’ll play you a sound recorded somewhere in the Bay Area. Your job? Listen to the sound in the player above, figure out where it was recorded and what it is, then call to let us know.

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 is Audiograph — the Bay Area’s sonic signature. Each week, we’ll play you a sound recorded somewhere in the Bay Area. Your job? Listen to the sound in the player above, figure out where it was recorded and what it is, then call to let us know.

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 is Audiograph — the Bay Area’s sonic signature. Each week, we’ll play you a sound recorded somewhere in the Bay Area. Your job? Listen to the sound in the player above, figure out where it was recorded and what it is, then call to let us know.

Here's the sound we played as a clue. We asked you to guess what exactly it is and where exactly in the Bay Area we recorded it.