In case you happen to not be in cicada territory and don't have the joy of listening to their "soothing music" here's a video of our backyard with our local cicadas from brood 2011 blaring in the background. The sound in the trees is deafening and after 45 minutes of being outside your head begins to throb. Turn up your computer's volume to get as much of the effect as possible or to creep out your co-workers! It's not the same as being here, but you'll get the idea!
And here's a close-up picture of the cicadas if you can't get enough of these noisy insects!