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.

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.