Interesting JSTOR sidenote - before we made Coffitivity, this research was behind a Paywall, and we convinced them to remove it. It was weird timing when it happened, it was kind of emotional to speak to JSTOR at the time, but it's cool we can just link to it now.

I usually do my best work with music, street noise and chatter from the TV at the same time. The more variety, the better.

I also like a mix of different types of noise. I actually built a little site to mix ambient noises together [1].

[1] http://asoftmurmur.com

That's what coffitivity suggests. The iPhone app even has a mixer to mix the ambient noise with your music.