Recommend a white noise machine for work

I just moved to a new “office” at work - it’s a pretty nice cubicle, with a window. However, a high level director sits on the other side of the cubicle wall and she likes to listen to music. I’ve gotten really good at cubicle life (tuning out phone calls, conversation, the sounds of people eating lunch) but this music is really driving me crazy.

Asking her to turn it down or wear headphones really isn’t an option, so can you please recommend an effective white noise machine? (I could wear headphones, but when I write, I don’t want to listen to any noise, not even my own music).

Thanks!!!

I use the Marpac Sound Screen to drown out my douchebag neighbors. Works great. One thing I really like about it is that it mechanically generates the noise, versus a digital recording where I can sometimes detect where it loops.