I work in a cubeless environment myself now. It can be very distracting with people having conversations or walking by (not even to see me). I rely on headphones to drown out the noise and use Google Play music for streaming (paid subscription). Also, I sometimes use an app called Cofftivity which adds ambient noise (like library sounds, coffee house) as well. I feel like sometimes music can be a distraction, but having the music plus real life sounds playing can really help me focus. I relied on it to concentrate when I completed my Masters Degree (lots of reading and writing papers).
Hope this helps.