I currently work in an environment with about 40 people -- managers, developers, "operations" people -- all in an "open plan" office with half-height partitions

I currently work in an environment with about 40 people -- managers, developers, "operations" people -- all in an "open plan" office with half-height partitions. The distractions are constant; my field of view is always busy, someone is always talking, I can hear every phone conversation in the area, and even the coffee machine is loud. The printer is in the middle of the area, so whenever someone prints, it becomes a squeaking, beeping distraction. If I check my bank account balance before going to lunch, everyone can see; even if I have head phones on over earplugs, people still interrupt me! My productivity has fallen by at least half, probably more.